scholarly journals The influence of weather conditions during an autumn period on the development of basic wreckers and diseases of agrocenosis of winter wheat in Forest-Steppe zone

2019 ◽  
pp. 10-14
Author(s):  
L. Parminska ◽  
N. Havryliuk
Keyword(s):  
Climate Change ◽  
Winter Wheat ◽  
Air Temperature ◽  
Field Research ◽  
Weather Conditions ◽  
Steppe Zone ◽  
Laboratory Research ◽  
Quantitative Composition ◽  
Forest Steppe ◽  
Autumn Period

Goal. To investigate the influence of weather conditions, to specify the terms of sowing in an autumn period and their influence on the phytosanitary condition of winter wheat’s agrocenosis in the Forest-steppe zone. In conditions of climate change, specify the quantitative composition of the entomological and on phytopathogenic complexes in winter wheat chrops and the peculiarities of their manifestation. Methods. Field research, laboratory research, and analytical research. The field researches have been conducted in the conditions of monitoring inspections. The results of the experimental data are counted and collected using modern standard computer programs (Word, Excel). Results. Influence of weather conditions was investigated in the autumn period (air temperature, amount of precipitation) for 2006—2016 and the long-term seasonal dynamics of the number of basic wreckers on winter wheat sowing and detected features during climate change. Many years of weather conditions during winter wheat sowing have been analyzed. Conclusions. Global warming and drought caused by it in the autumn period prolonged the term of the autumn vegetation of winter wheat. Through droughty conditions, or over wetting optimal terms of sowing were displaced for later. It was researched that optimal terms of winter wheat sowing are considered in the zone of the North Forest-steppe from 15—25 September, which is allowed until 30 September. The increase in air temperature and a sufficient amount of precipitation in the autumn period leads to dissemination of sowing the most widespread wreckers and affection of plants by diseases. With the approach of ETL, there may be a need for protective measures in the conditions of early sowing and prolonged warm autumn, especially after colony precursors. Autumn spraying crops with fungicidal agents prevents plant infections by pathogens in the early phases of plant development.

scholarly journals The Typicality of Hydrothermal Conditions of the Forest Steppe and Their Influence on the Productivity of Crops

2020 ◽  
Vol 76 (3) ◽  
pp. 84-95
Author(s):  
Andrii Butenko ◽  
Dmytrо Litvinov ◽  
Natalia Borys ◽  
Olena Litvinova ◽  
Ihor Masyk ◽  
...  
Keyword(s):  
Air Temperature ◽  
Spring Barley ◽  
Weather Conditions ◽  
Maize Yield ◽  
Vegetation Period ◽  
Steppe Zone ◽  
Forest Steppe ◽  
Hydrothermal Conditions ◽  
The Impact

Analysis of changes in hydrothermal conditions of growing crops in the forest steppe zone of Ukraine over a period of 2004–2016 showed that by the average monthly air temperature more than a half of the years under study and by rainfall nearly a third of the researched period differed significantly from the average long-term value and were close to extreme weather. Statistical analysis of long-term indicators of the air temperature regime is evidence of a steady trend towards an increase in average annual air temperature with significant fluctuations in indices in separate periods from 7.9 ± 2.9 to 10.0 ± 2.5oС and a decrease in the amount and instability of natural moisture entry. The influence of weather conditions on the formation of productivity of spiked cereals (winter and spring wheat, spring barley) and maize was assessed at the current agrometeorological risks in the forest steppe of Ukraine. Based on the correlation-regression analysis, mathematical models were created that reproduce the dependence of grain yields upon the complex weather conditions of the growing season, the impact of which reached 60–70%. The conditions of eight years (2006–2008, 2011–2014 and 2016), when the hydrothermal index for the vegetation period was 1.13–1.76, turned out to be optimal by hydrothermal indicators to harvest maize yield at 5.83–9.47 t/ha. However, the years of 2005, 2009–2010 and 2015 were unfavorable as they received precipitation by 120 mm lower than a norm or 36% of the norm. The rainfall by 37–61% lower than a norm in June–July and grain yield 3.12–6.51 t/ha were also characteristic of the years mentioned above.

scholarly journals Climate change and economic efficiency of agricultural production in the Steppe zone

2020 ◽  
pp. 56-69
Author(s):  
Yu. O. Tararico ◽  
Yu. V. Soroka ◽  
R. V. Saidak
Keyword(s):  
Climate Change ◽  
Water Supply ◽  
Agricultural Production ◽  
Cropping System ◽  
Weather Conditions ◽  
Steppe Zone ◽  
Annual Rainfall ◽  
Winter Rape ◽  
Average Value ◽  
Dry Steppe

Relevance of research. Due to ongoing climate change, almost the entire territory of the Steppe of Ukraine by annual humidity factor belongs to the dry and very dry zones, the relative area of ​​which has increased by 13.2% of the total area of ​​the country compared to the 1960-1990s. At the same time, for today in Ukraine only about 500 thousand hectares are actually irrigated, that is 19% of the potential area. Purpose of research. To determine the patterns and trends of climate change in the western part of the dry Steppe of Ukraine and analyze the economic indicators of production activity in the region as to the variable weather conditions. Research methodology. Climate change was estimated on the basis of Climate Water Balance (CWB) and Hydrothermal Coefficient (HTC) values. The analysis of the economic efficiency of agricultural production was carried out by analyzing the statistical data for Odessa region and for the chosen agricultural enterprise. Research results and conclusions. The use of significant heat supply in the dry Steppe zone is limited by insufficient water supply conditions. In the years of 1991-2016  the average annual rainfall was 480 mm and since the early 2000s there has been a slight increase in that. However, even having 500-550 mm of average annual rainfall that has been observed over the past five years, it is not enough for providing high-yield agricultural production. High thermal regime couses high evaporation that in turn, leads to water supply deficit, which at the end of the growing season amounts to 336-436 mm. According to the HTC index in the region 80% of cases show severe and moderately arid vegetation conditions. At the same time, irrigation area in the region has decreased to a minimum, which has led to the domination of winter cereals and sunflower in the cropping system. Under variable weather conditions, winter wheat yields ranged from 19.4 to 38.5 c/ ha (31.4 c/ha on average) and sunflower - from 12.2 to 21.4 c/ha (17.4 c/ha on average), winter rape - from 13.1 to 20.9 c/ha (18.2 c/ha). It was proved a close direct relationship between the sale price of products of all studied crops and their cost price, as well as the inverse relationship of these indicators with the crop yield. The profitability of winter wheat from 2011 till 2016 ranged from 17 to 153 USD/ha with an average value of 86 USD/ha, winter rape - from 39 to 273 USD/ha with an average value of 166 USD  ha and sunflower - from 116 to 315 USD/ha with an average value of 192 USD/ha. Corn and soybeans have proven to be unprofitable in some years, which obviously explains rather small areas under these crops in the region. Above mentioned demonstrates the high economic instability of agricultural production in changing weather conditions, which is accompanied by significant risks for producers, especially when attracting credits. This situation, in turn, leads to a limited use of intensification means, in particular mineral fertilizers, which promotes agrochemical soil degradation. Under unstable water supply, the magnitude of net profit variation per hectare of arable land in Odessa region is 33-188 USD/ha (111 USD/ha on average). It is possible to increase these indicators by increasing the share of winter rape in the cropping system. With the optimization of the water and air soil regimes as well as crop rotation factor, the profitability of agricultural production in the region can be increased up to 580-600 USD/ha. Similar results were obtained after analyzing the statistical data from the southern regions within the dry steppe zone.

scholarly journals Influence of the growth regulator “Regoplant” and microfertilizer “Ultramag Kombi” on photosynthetic activity of potatoes in the forest-steppe zone Republic of North Ossetia-Alania

2021 ◽  
Vol 210 (07) ◽  
pp. 55-65
Author(s):  
Larisa Ikoeva ◽  
Oksana Haeva
Keyword(s):  
Growth Regulator ◽  
Field Experiments ◽  
Photosynthetic Activity ◽  
Low Cost ◽  
Weather Conditions ◽  
Steppe Zone ◽  
Practical Significance ◽  
Forest Steppe ◽  
Photosynthetic Productivity ◽  
North Ossetia

Abstract. The purpose of the work is to study the influence of the growth regulator “Regoplant” and microfertilizer “Ultramag Kombi” on the photosynthetic productivity of the potatoes of the Barna variety based on the results of field experiments in the forest-steppe zone Republic of North Ossetia-Alania. Methods. Studies on the tasks were carried out in 2018–2020. at the experimental site of the NCRIMFA branch of the VSC of RAS in the conditions of the forest-steppe zone Republic of North Ossetia-Alania according to generally accepted methods. The soil of the experimental plot is medium-power heavy loamy leached chernozem, lined with pebbles. Results. It is established, that biological products under identical soil and weather conditions assisted different progress of plants and approach of phases of vegetation. For all variants of the experiment, the number of stems increased by 0,3–0,7 pcs., the height of the stems of potato plants – by 3,8–4,9 cm in comparison with the control. An intense increase in the mass of tops occurred when using a tank mixture (growth regulator “Regoplant” (25 ml/ha) + microfertilizer “Ultramag Combi” (0,75 l/ha)) – by 74 g/bush, or 15.5 % compared with the control variant. During the growing season, the sum of the photosynthetic potential (FP) was 1,070 thousand m2 •days/ha in the control, and on average 1198–1406 thousand m2•days/ha in the experimental variants. The greatest accumulation of dry matter was noted when using a tank mixture – 917 g/m2. The maximum pure photosynthetic productivity was observed in experimental variant IV – 6,52 g/m2•day compared to the control option. Scientific novelty. For the first time in the forest-steppe zone Republic of North Ossetia-Alania the effect of the growth regulator “Regoplant” and microfertilizer “Ultramag Kombi” on photosynthetic activity of potatoes was studied. Practical significance. The studies carried out make it possible to recommend in potato production the use of a tank mixture of an effective growth regulator “Regoplant” at a dose of 25 ml/ha and microfertilizer “Ultramag Combi” at a dose of 0,75 l/ha, as an ecologically safe and low-cost agricultural method when processing vegetative plants, providing an increase in yield and quality of tubers.

scholarly journals Effects of Climate Change on Epidemics of Powdery Mildew in Winter Wheat in China

Plant Disease ◽  
2017 ◽  
Vol 101 (10) ◽  
pp. 1753-1760 ◽  
Author(s):  
Xiuli Tang ◽  
Xueren Cao ◽  
Xiangming Xu ◽  
Yuying Jiang ◽  
Yong Luo ◽  
...  
Keyword(s):  
Climate Change ◽  
Relative Humidity ◽  
Powdery Mildew ◽  
Winter Wheat ◽  
Weather Conditions ◽  
Early Spring ◽  
Long Term Effects ◽  
Temperature Changes ◽  
Disease Epidemics

Powdery mildew is a highly destructive winter wheat pathogen in China. Since the causative agent is sensitive to changing weather conditions, we analyzed climatic records from regions with previous wheat powdery mildew epidemics (1970 to 2012) and investigated the long-term effects of climate change on the percent acreage (PA) of the disease. Then, using PA and the pathogen’s temperature requirements, we constructed a multiregression model to predict changes in epidemics during the 2020s, 2050s, and 2080s under representative concentration pathways RCP2.6, RCP4.5, and RCP8.5. Mean monthly air temperature increased from 1970 to 2012, whereas hours of sunshine and relative humidity decreased (P < 0.001). Year-to-year temperature changes were negatively associated with those of PA during oversummering and late spring periods of disease epidemics, whereas positive relationships were noted for other periods, and year-to-year changes in relative humidity were correlated with PA changes in the early spring period of disease epidemics (P < 0.001). Our models also predicted that PA would increase less under RCP2.6 (14.43%) than under RCP4.5 (14.51%) by the 2020s but would be higher by the 2050s and 2080s and would increase least under RCP8.5 (14.37% by the 2020s). Powdery mildew will, thus, pose an even greater threat to China’s winter wheat production in the future.

scholarly journals SPECIFICS OF LANDSCAPE RESEARCH OF SILVICULTURAL LANDSCAPE

2021 ◽  
pp. 52-62
Author(s):  
Denysyk H.I. ◽  
Kanskyi V.S. ◽  
Hryshko S.V. ◽  
Stefankov L.I.
Keyword(s):  
Field Research ◽  
Steppe Zone ◽  
Planting Density ◽  
Forest Steppe ◽  
Anthropogenic Landscapes ◽  
Trunk Diameter ◽  
The Rich ◽  
The Right ◽  
Landscape Ecological ◽  
North Western

Specific approaches, principles and methods of cognition of modern silvicultural landscapes are considered; it is stated that due to the fact that the difference between natural and anthropogenic silvicultural landscapes is only in their genesis, in the process of studying silvicultural landscapes, both classical and specific approaches, principles and methods can be used. Among the specific approaches, the historical-cartographic one with the inherent principles of historicism and methods of historical-genetic series of maps, historical-archaeological method is considered in more detail; system-adaptive with the principle of combination and methods of comparison of natural analogues and analysis of final results; landscape-biocoenotic and landscape-ecological with the methods of the leading factor, comparison of disturbed and control biogeocenoses and arealographic, as well as geoinformation approach in the knowledge of silvicultural landscapes. It is shown that all approaches, principles and methods of knowledge of forest anthropogenic landscapes should be applied depending on the available conditions and needs of practice. However, in the process of field research, landscape-biocoenotic and landscape-ecological approaches with their own principles and methods of cognition of forest anthropogenic landscapes were more often used. It is shown that in its implementation landscape scientists not only have the right, but also the obligation to use the rich experience of foresters. It is advisable to characterize the stand in the following order: dominant species by tiers (in tree, shrub and grass), quality, age, height of trees – in meters, trunk diameter – in cm, planting density. In abbreviated form, information about the forest tract is presented in the form of a kind of formula. These approaches, principles and methods were applied in the process of studying the forest anthropogenic landscapes of two regions of Ukraine – Podillia (Forest-Steppe Zone) and North-Western Pryazovia (Steppe Zone). The expediency and necessity of their application are substantiated in the process of dissertation research and confirmed by practice.Key words: Podillia, North-Western Pryazovia, research, silvicultural landscapes, approaches, principles, methods, significance, use. Розглянуто специфічні підходи, принципи і методи пізнання сучасних лісокультурних ланд-шафтів. Зазначено, що у зв’язку з тим, що між натуральними й антропогенними лісовими ландшафтами різниця лише у їх ґенезі, отже, у процесі дослідження лісокультурних ландшафтів можна застосовувати як класичні, так і специфічні підходи, принципи та методи. Серед специфічних під-ходів детальніше розглянуто історико-картографічний з притаманними йому принципами істо-ризму та методами історико-генетичних рядів карт, історико-археологічним методом; системно-адаптивний з принципом сумісництва та методами порівняння натуральних аналогів і аналізу кінцевих результатів; ландшафтно-біоценотичний та ландшафтно-екологічний з методами провідного чинника, порівняння порушених і контрольних біогеоценозів та ареалографічного, а також геоінформаційний підхід у пізнанні лісокультурних ландшафтів. Показано, що всі підходи, принципи і методи пізнання лісових антропогенних ландшафтів необхідно застосовувати залежно від наявних умов та потреб практики. Однак у процесі польових досліджень частіше використовували ландшафтно-біоценотичний і ландшафтно-екологічний підходи з належними їм принципами і методами пізнання лісових антропогенних ландшафтів. У цих підходах у разі картографування лісокультурних урочищ, крім характеристики рельєфу й властивостей ґрунтів, вагоме значення має аналіз деревостану. Показано, шо у його здійсненні ландшафтознавці не лише мають право, але й зобов’язані використовувати багатий досвід лісознавців. Характеристику деревостану доцільно проводити у такому порядку: домінуючі види за ярусами (в деревному, кущовому та трав’яному), бонітет, вік, висота дерев – у метрах, діаметр стовбура – у см, щільність насадження. У скороченому вигляді інформація про лісокультурне урочище представлена у вигляді своєрідної формули. Ці підходи, принципи і методи застосовано у процесі дослідження лісових антропогенних ландшафтів двох регіонів України – Поділля (Лісостепова зона) і Північно- Західного Приазов’я (Степова зона). Доцільність та необхідність їх застосування обґрунтовано у процесі дисертаційних досліджень та підтверджено практикою.Ключові слова: Поділля, Північно-Західне Приазов’я, дослідження, лісокультурні ландшафти, підходи, принципи, методи, значимість, використання.

scholarly journals Trends of weather-related impacts on Austrian crop production under changing climate

2021 ◽  
Author(s):  
Sabina Thaler ◽  
Josef Eitzinger ◽  
Gerhard Kubu
Keyword(s):  
Climate Change ◽  
Winter Wheat ◽  
Crop Production ◽  
Crop Yields ◽  
Weather Conditions ◽  
Crop Growth ◽  
Risk Indicators ◽  
Climate Scenarios ◽  
Crop Water

&lt;p&gt;Weather-related risks can affect crop growth and yield potentials directly (e.g. heat, frost, drought) and indirectly (e.g. through biotic factors such as pests). Due to climate change, severe shifts of cropping risks may occur, where farmers need to adapt effectively and in time to increase the resilience of existing cropping systems. For example, since the early 21st century, Europe has experienced a series of exceptionally dry and warmer than usual weather conditions (2003, 2012, 2013, 2015, 2018) which led to severe droughts with devastating impacts in agriculture on crop yields and pasture productivity.&lt;/p&gt;&lt;p&gt;Austria has experienced above-average warming in the period since 1880. While the global average surface temperature has increased by almost 1&amp;#176;C, the warming in Austria during this period was nearly 2&amp;#176;C. Higher temperatures, changing precipitation patterns and more severe and frequent extreme weather events will significantly affect weather-sensitive sectors, especially agriculture. Therefore, the development of sound adaptation and mitigation strategies towards a &quot;climate-intelligent agriculture&quot; is crucial to improve the resilience of agricultural systems to climate change and increased climate variability. Within the project AGROFORECAST a set of weather-related risk indicators and tailored recommendations for optimizing crop management options are developed and tested for various forecast or prediction lead times (short term management: 10 days - 6 months; long term strategic planning: climate scenarios) to better inform farmers of upcoming weather and climate challenges.&lt;/p&gt;&lt;p&gt;Here we present trends of various types of long-term weather-related impacts on Austrian crop production under past (1980-2020) and future periods (2035-2065). For that purpose, agro-climatic risk indicators and crop production indicators are determined in selected case study regions with the help of models. We use for the past period Austrian gridded weather data set (INCA) as well as different regionalized climate scenarios of the Austrian Climate Change Projections &amp;#214;KS15. The calculation of the agro-climatic indicators is carried out by the existing AGRICLIM model and the GIS-based ARIS software, which was developed for estimating the impact of adverse weather conditions on crops. The crop growth model AQUACROP is used for analysing soil-crop water balance parameters, crop yields and future crop water demand.&lt;/p&gt;&lt;p&gt;Depending on the climatic region, a more or less clear shift in the various agro-climatic indices can be expected towards 2050, e.g. the number of &quot;heat-stress-days&quot; for winter wheat increases significantly in eastern Austria. Furthermore, a decreasing trend in maize yield is simulated, whereas a mean increase in yield of spring barley and winter wheat can be expected under selected scenarios. Other agro-climatic risk indicators analysed include pest algorithms, risks from frost occurrence, overwintering conditions, climatic crop growing conditions, field workability and others, which can add additional impacts on crop yield variability, not considered by crop models.&lt;/p&gt;

scholarly journals Economic and bioenergetic evaluation of seed cultivation of winter wheat triticale varieties in western Forest-Steppe zone

2018 ◽  
pp. 55-64
Author(s):  
Valentyna Hlyva ◽  
◽  
Ihor Voloshchuk ◽  
Halyna Hereshko ◽  
Oksana Kovalchuk ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Steppe Zone ◽  
Forest Steppe

scholarly journals Spectral assessments of winter wheat varieties and breeding lines in the autumn period

2021 ◽  
Vol 12 (2) ◽  
pp. 29-36
Author(s):  
R.I. Topko ◽  
◽  
G.V. Vologdina ◽  
A.V. Gumenyk ◽  
H.M. Kovalyshyna ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Weather Conditions ◽  
Analysis Data ◽  
Wheat Varieties ◽  
Breeding Lines ◽  
Autumn Period ◽  
Biochemical Processes ◽  
Index Value ◽  
Favorable Weather ◽  
Sowing Period

The introduction of modern methods for field assessment of winter wheat genotypes is an integral part of improving the quality of the breeding process. The creation, adaptation and use of innovative screening technologies in breeding is becoming increasingly popular and allows the breeder to more widely and objectively evaluate the original forms and newly created material. Important for winter is the autumn period, when under favorable weather conditions (gradual decrease in temperature) there is a slowdown in the growth rate of winter wheat, changing physiological and biochemical processes in the plant, which contribute to its transition to hibernation. The state of winter wheat crops (morpho-biometric indicators of plants) in the autumn is largely decisive in the formation of a sufficient level of winter hardiness, and thus affects the further productivity of the crop. According to the results of analysis of morpho-biological and spectral analysis data, it was established that before overwintering the best condition for the first sowing period was winter wheat plants: MIP Lada (NDVI = 0.48), erythrospermum line 55023 (NDVI = 0.46), Lutesens 60049 (NDVI = 0.46), varieties MIP Distinction (NDVI = 0.46) MIP Jubilee (NDVI = 0.46), MIP Dnipryanka (NDVI = 0.46) and line Lutesens 55198 (MIP Gift) (NDVI = 0, 47). In the standard variety Podolyanka, the index value was at the level of 0.45. During the second sowing period, the following varieties were identified: MIP Assol (NDVI = 0.32), Ballad Myronivska (NDVI = 0.32), Erythrospermum 55023 (NDVI = 0.33), MIP Lada (NDVI = 0.33), MIP Jubilejna ( NDVI = 0.32) and Lutesens 55198 (MIP Gift) (NDVI = 0.32) and Lutesens 60107 (NDVI = 0.32). NDVI index of Podolyanka variety was at the level of 0.32.

scholarly journals Breeding evaluation of chinese bread winter wheat varieties recent in the northeastern Forest-Steppe of Ukraine

2019 ◽  
pp. 3-11
Author(s):  
O.M. Bakumenko ◽  
V.A. Vlasenko ◽  
O.M. Osmachko ◽  
Fanhua Meng ◽  
Qian Zhou
Keyword(s):  
Winter Wheat ◽  
Weather Conditions ◽  
Forest Steppe ◽  
Wheat Varieties ◽  
Experimental Field ◽  
North East ◽  
Winter Conditions ◽  
Early Ripening ◽  
Winter Wheat Varieties

Experimental researches had been carried out during 2012–2016 in the crop rotation of Sumy National Agrarian University (SNAU) of the Ministry of Education and Science of Ukraine. Soils on the experimental field of SNAU – black soil typical deep, non-humusful medium-loam with high and medium provision with elements of mineral nutrition. The humus content about 3.9 %. The reaction of the soil solution is close to neutral (5.8). The analysis of the weather conditions of 2012–2016 researches was conducted on the basis of annual data provided by the meteorological station of the Institute of Agriculture of the North-East of the NAAS, located five kilometers from the experimental field of SNAU. The SNAU soils are classified in the second agro-climatic region of the Sumy region, which according to a long-term data is characterized by temperate continental climate with warm summers and not very cold winters with thaws. Average daily (average annual) air temperature during 2012–2016 fluctuated from +7.9 to +9.5 ºС, and the legth of the frost-free period was close to 230 days. Long-term indicator, precipitation falls within 597–600 mm, with most of it – in the warm period (April-October). In general, the weather conditions during the winter wheat vegetation periods differed from the average annual parameters of the temperature regime, the amount of precipitation and their monthly distribution. It should be noted the excess of temperature to the average long-term index, as well as a slight precipitation increasing. In general, it facilitated to a comprehensive evaluation of the studied Chinese varieties as for an adaptive ability under condition of Ukraine. The samples of Chinese winter wheat varieties which originated from the expeditionary gatherings conducted by V. A. Vlasenko in Gansu and Hebei provinces in (2000–2012) were the material for conducting researches. The cultivar Podolianka (the standard) was used in the study for comparison. The research was carried out using field, laboratory and mathematical-statistical methods. Phenological observations and records, evaluation and harvesting were conducted in accordance with generally accepted methods. The results of research as for adaptive potential of Chinese bread winter wheat varieties are presented. 50 new cultivars of Chinese origin were analyzed under the conditions of left-bank side of North-East Forest-Steppe of Ukraine: super-early varieties – 10 %; early ripening varieties – 54 %; middle-early varieties – 12 %; mid-ripening varieties – 24 %. As for the level of tolerance for winter conditions, all groups of alien crops were inferior to the standard (cultivar Podolyanka) though they had a great level of index (6.4–7.9 points). In general, Chinese cultivars under the conditions of the research were characterized by relatively satisfactory tolerance for winter conditions; 52 % of analyzed patterns wintered at the level of standard with 8 points. Among them: super-early varieties – 2 %; early ripening varieties – 20 %; middle-early varieties – 8 %; mid-ripening varieties – 22 %. As for the height of the plants we identified – from medium-sized (81‒110 cm) forms to dwarf (30-50 cm). The analyzed genotypes divided into medium-sized forms – 22 %, dwarf forms – 14 % and semidwarf forms – 64 %. There was a direct relation between: a plant height → group of ripeness (r = 0.96) → group of ripeness (r = 0.92) → resistance to overwintering (r = 0.78). Among the analyzed patterns high resistance against a group of diseases had the varieties: middle-early genotypes – Longzhong 10, Zhong mai 19, Shijra zhuang 8; mid-ripening genotypes – Longzhong 1, Longzhong 3, Longzhong 2, Longzhong 4, Longzhong 12, Longzhong 7; early ripening genotypes – DF529, Lankao 906, DF581, СА0175, Zhongmai 9, Shi 4185, Jimai 22, Shixin 733, Shimai 12. As for the crop better than the standard: early ripening varieties –Jimai 19, DF529; middle-early varieties – Shijiazhuang 8, Longzhong 10, Jingdong 8; middle-early varieties – NSA 97-2082, Longzhong 2, Longzhong 4, Longzhong 7, Longzhong 5, Longzhong 8, Longzhong 12, Longzhong 11, Longzhong 3. 16 % of analyzed cultivars distinguished by the totality of researched characteristics – DF529, Shijiazhuang 8, Longzhong 3, Longzhong 10, Longzhong 4, Longzhong 7, Longzhong 12, Longzhong 2.

scholarly journals Comparative evaluation of autumn and spring application herbicides in winter wheat crops in the conditions of the forest-steppe zone of Ukraine

2019 ◽  
pp. 175-190
Author(s):  
I. Storchous
Keyword(s):  
Winter Wheat ◽  
Technical Efficiency ◽  
Growth Parameters ◽  
Steppe Zone ◽  
Cultural Development ◽  
Optimal Time ◽  
Optimal Timing ◽  
Forest Steppe ◽  
Effective Period ◽  
Negative Impacts

Goal. Justification for autumn and spring application of herbicides in crops of winter wheat in conditions of Forest-Steppe zone of Ukraine. Methods. Observation, analysis and synthesis in conjunction with special methods. Special methods: field — for evaluation of the properties of weeds to reproduce and regenerate, the study of ontogenesis and morphogenesis, depending on various factors; quantity and weight — to determine the level of contamination of sowing, growth parameters and development of plants, productivity and elements of structure; mathematically-statistical — to determine the reliability of the results. Results. The level of technical efficiency of herbicides and derivatives aromatic amines and sulfonylureas. Improved control segetal vegetation and identifies the effective period for the application of herbicides in crops of winter wheat with the aim of ensuring high crop yield. Studies have confirmed that the timely and maximum destruction of weeds in crops of winter wheat contributed to better growth and development of plants in culture, which showed its competitiveness to counter the negative impacts segetal vegetation throughout the growing season. Conclusions. The optimal timing for herbicide application in the autumn in crops of winter wheat is the phenological phase of development of the culture of the 1—2 leaf, the rate of consumption of sulfonylureas: Marafon KC — 4.0 l/ha was Grodil Maxi OD, and.d. — 0,11 l/ha, Granstar gold 75, v.g. — 0,035 kg/ha, Starane Premium 330 EC, k.e. — 0.5 l/ha. During the autumn application of technical efficiency of 100% had the variant with the application of herbicide Granstar gold 75, VG with a dose rate of 0.035 kg/ha. With the herbicide in the spring, the optimal time was the phenological phase of cultural development — tillering. Technical efficiency of the medicines when spring application in all variants amounted to 90—100%.

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