scholarly journals Biomass as a factor contributing to winter wheat yield increase

2019 ◽  
Vol 24 ◽  
pp. 265-270
Author(s):  
V. V. Morgun ◽  
G. A. Priadkina ◽  
O. O. Stasik ◽  
O. V. Zborіvskaіa

Aim. The search of factors influencing grain productivity, based on the comparison of the mass of dry matter in the aboveground parts of modern winter wheat varieties at the early stages of ontogenesis. Methods. Morphometric determination of biomass of the above-ground plant parts. Results. The varieties and lines of winter wheat with higher yields exceeded the less productive ones by the number of shoots per 1 m2 of soil on 8–12 % and by the dry matter weight of the above-ground plant parts on 23–34 % at the early stages of spring vegetation. According to two-year experiments, it was established a linear positive correlation (r = 0.85–0.86) of the dry matter weight of the above-ground plant parts per 1 m2 of soil during the period of stem elongation (BBCH 31-49) with the yield. Conclusions. The close relationship between yield and dry matter weight of the above-ground plant parts at the early stages of spring vegetation makes it possible to rank winter wheat varieties by potential yield. Keywords: Triticum aestivum L., grain productivity, biomass, early stages of ontogenesis.

2019 ◽  
Vol 10 (2) ◽  
pp. 239-244
Author(s):  
V. V. Morgun ◽  
G. A. Priadkina ◽  
O. V. Zborivska

Adaptation of high-yielding winter wheat crops to changes in climatic conditions has great importance for food security of countries. The remobilization of stem assimilates for grain filling is one of the possible ways of increasing wheat yield in unfavourable environmental conditions. Field experiments in natural conditions with three old and three modern varieties of winter wheat were performed to compare depositing abilities of their stems. The objective of this study was a comparative analysis of the parameters of depositing capacity of stems of the main shoots for identification of the criteria for assessing grain productivity of winter wheat. The parameters of depositing capacity of the stem of the main shoots of three old winter wheat varieties (1997, 2003, and 2008) and three modern ones (2013, 2014 and 2016) were studied in field conditions with natural conditions of water supply (Kyiv Oblast, Ukraine). During the period of formation of reproductive organs (April and May), the amount of precipitation, respectively, was only 17% and 68% of long-term values and average monthly air temperature was 3–4 ºС higher than the climatic norm. We analyzed the variability of the parameters of depositing capacity of the stem of the main shoot and grain productivity of the ear of six wheat winter varieties which differed by time of selection. In unfavourable conditions during the period of formation of reproductive organs the modern winter wheat varieties had an 11% higher yield on average compared to the older ones. It was determined that the highest mass of grain from the ear of the main shoots (1.9–2.1 g) belonged to Odeska 267 variety, a drought-tolerant variety from earlier selection, and three modern varieties – Raihorodka, Prydniprovska and Darunok Podillia. It is demonstrated that these varieties also exceeded two old varieties (Podolianka and Yednist) by stem dry matter weight of main shoot at anthesis by 0.3–0.6 g. The highest content of non-structural carbohydrates at this phase was observed in Odeska 267, Raihorodka and Darunok Podillia varieties (273–307 mg/stem). Correlation analysis revealed the significant correlation between mass of grain from ear and dry matter of stem at anthesis and full ripeness, as well mass of grain from ear and the amount of non-structural carbohydrates at anthesis. Therefore, modern varieties of winter wheat and the drought-tolerant variety have higher yield, weight of dry matter of stem of the main shoot at anthesis and grain productivity of the ear, compared to old varieties. The results of this study indicate that the mass of dry matter of the stem of the main shoot at anthesis can be used as a marker of the grain productivity of winter wheat.


2015 ◽  
Vol 28 (2) ◽  
pp. 155-175
Author(s):  
Witold Drezner

The correlation between the net assimilation rate and the degree of plant tillering are investigated for several varieties of simple winter wheat. The net assimilation rate (E, NAR, An) of the studied varieties for different degrees of tillering, individual shoots and individual plants is described according to the units mg/cm<sup>2</sup> • 24 h. Index of efficiency of assimilation surface (F, LAR, I<sub>S</sub>) is determined in units cm<sup>2</sup>/mg. The tillering ability of vegetative shoots in plaints is a very important factor which increases the total assimilate stirfaice value and the assimilation effectivity of the plant's biomass.


2011 ◽  
Vol 59 (1) ◽  
pp. 35-45
Author(s):  
E. Sugár ◽  
Z. Berzsenyi

The effect of nitrogen (N) fertilisation on the growth of winter wheat varieties was examined in three diverse years using the functional method of growth analysis. The main plot in the two-factorial, split-plot experiment was the N treatment and the subplot the variety. The wheat varieties Mv Toborzó (extra-early), Mv Palotás (early) and Mv Verbunkos (mid-early) were treated with N rates of 0, 80, 160 and 240 kg N ha−1 (N0, N80, N160, N240). The Hunt-Parsons (HP) program fitted a third-degree exponential function to the dry matter and leaf area data. In 2007 and 2008 dry matter accumulation continued up to the N240 rate and in 2009 to the N160 rate. In all three years the highest value was recorded for Mv Verbunkos (4.62 g plant−1 in 2007, 4.63 g in 2008 and 4.51 g in 2009). The highest value of maximum leaf area (237.5 cm2) was found for Mv Verbunkos in the N240 treatment. The maximum values of leaf area in each N treatment, averaged over years and varieties (cm2 plant−1), were as follows: N0: 86.2; N80: 141.0; N160: 164.0; N240: 173.1. The parameter AGRmean exhibited the highest value (8.04 g day−1 102) in the N160 treatment, while among the varieties Mv Verbunkos had the highest mean value (7.18 g day−1 102). The highest value of RGRmean was achieved by Mv Toborzó in the N160 treatment in 2009 (3.94 g g−1 day−1 102). The value of NARmean increased up to fertiliser rates of N160 and N240, with mean values (g m−1 day−1) of N0: 2.35, N80: 2.44, N160: 2.53 and N240: 2.47. The highest value of NAR (3.29 g m−1 day−1) was obtained for Mv Palotás in the N160 treatment in 2008. On average the greatest value of LARmax was recorded in the N160 treatment (172.8 cm2 g−1), while the highest absolute value (213.6 cm2 g−1) was achieved by Mv Toborzó in 2008. The unfavourable effect of the drought in 2007 was clearly reflected in the values of the growth parameters.


1922 ◽  
Vol 12 (1) ◽  
pp. 1-19 ◽  
Author(s):  
Robert Newton

1. A number of varieties of winter wheat, known to vary considerably in degree of winter hardiness, were compared in the hardened condition with reference to the physical constants of the cell sap, and the content of dry matter, nitrogen, sugars and starch.2. No constant relation was found between depression of the freezing point, specific conductivity, or hydrogen-ion concentration of the cell sap and relative frost hardiness.3. Sugars accounted for 34 to 38 per cent, of the total osmotic pressure of the sap.


2018 ◽  
Vol 23 ◽  
pp. 291-296
Author(s):  
O. V. Zborivska ◽  
G. O. Priadkina ◽  
O. G. Sokolovska-Sergienko ◽  
N. M. Makharinska

Aim. Estimation of the mass of dry matter of the stem of the main shoots of different varieties of winter wheat in the phases of flowering and full ripeness as a criterion for the grain productivity of its ear in years with different meteorological conditions. Methods. Field, morphometric, mathematical and statistical. Results. The mass of dry matter of the stem of the main shoots of winter wheat varieties was studied in years that differed significantly in weather conditions in the flowering phase and at full grain maturity. It was established that the mass of dry matter of the stem of the main shoot at the flowering and the full grain maturity varied significantly, respectively 0.6–1.2 g and 0.5–1.0 g in 2014, and 1.0–2.0 g and 0.8–1.5 g in 2016 depending on the variety, and under different growing conditions. Limits of variation of grain yield of the ear in 2014, ranged from 0.9 to 2.2 g and from 1.5 to 2.5 g in 2016. It was established that at the flowering, the correlation between the mass of grain from the head and the mass of the dry substance of the stem was significant at 99 % probability under growing conditions (r = 0.8–0.9). Conclusions. It is shown that grain productivity of main shoot in winter wheat is related to the ability of its stem to store assimilates during the vegetative period. It was established that the mass of the dry matter of the stem of the main shoots in the flowering phase can serve as a criterion for assessing its grain productivity. Keywords: Triticum aestivum L., mass of stem, grain yield.


2020 ◽  
Vol 10 (4) ◽  
pp. 102-108
Author(s):  
M. Nazarenko ◽  
S. Mykolenko ◽  
P. Okhmat

We have been studying the grain productivity and quality of 22 new winter wheat varieties during three years under North Ukrainian Steppe conditions. These 22 winter wheat varieties and control (national standard by grain productivity variety Podolyanka) were investigated regarding their interactions with environmental conditions by agronomic-value traits like as general grain productivity, components of one, protein and gluten content, developing relations between once (correlation relations), which determining wheat quality and yield in a complex. Two high-adaptive varieties Divo and Matrix, which provides us higher than standard grain yield in complex with higher or proper protein and gluten content were developed. Two factors permanently influenced on grain productivity (conditions of the year and genotype), while only one (genotype) determined the protein content of grains. We used the weight of thousand grains as an integrative parameter of the yield structure for all productive varieties, with no regards to yield formation.


2013 ◽  
Vol 53 (3) ◽  
pp. 203-209
Author(s):  
Beata Feledyn-Szewczyk ◽  
Krzysztof Jończyk ◽  
Adam Berbeć

Abstract The aim of the study was to determine the relationship between morphological features and canopy parameters of winter wheat varieties and weed infestation. The 2-year-long field experiments were conducted at 3 locations, on 13 varieties of winter wheat cultivated on organic farms. The response of the tested cultivars to weed infestation was similar regardless of the location. The number of weeds did not differ significantly between the wheat varieties and was similar in all locations and years of the study (109-122 plants/m2). The weed dry matter was significantly lower in Chomentowo (38 g/m2) compared to Osiny and Chwałowice (66 and 85 g/ m2). Nateja and Legenda wheat varieties showed the biggest competitiveness against weeds in both years and locations, whereas Alcazar, Boomer and Jenga were characterized as having the least competitive ability. Natula, Kohelia, Batuta and Ostroga wheat varieties showed a different response to weed infestation over the years. The analysis of correlation and cluster analysis showed that wheat dry matter, plant density, and wheat height had the greatest impact on the number and dry matter of weeds. There was no significant correlation between number of tillers per plant and weed infestation parameters measured in the dough stage


Author(s):  
В. В. Гамаюнова ◽  
А. В. Панфілова

Метою роботи було удосконалення елементів технології вирощування сортів пшениці озимої в умовах Південного Степу України на засадах ресурсозберігаючого живлення рослин шляхом оброблення посіву рослин рістрегулюючими речовинами в основні періоди вегетації по фону основного внесення невисоких доз мінеральних добрив. Методика дослідження. Експериментальні дослідження проводили впродовж 2011 – 2016 рр. на дослідному полі Миколаївського національного аграрного університету. Об’єктом досліджень була пшениця озима – сорти Кольчуга та Заможність. У дослідженнях застосовували загальноприйняті для зони методики досліджень. Урожайність визначали методом суцільного скошування з кожної облікової ділянки. Результати дослідження. У результаті виконаної роботи встановлено, що у роки досліджень урожайність пшениці озимої сорту Кольчуга коливалася в межах 2,89–4,48 т/га, а сорту Заможність – 3,05–4,99 т/га залежно від варіанту живлення. Найбільш оптимальним фон живлення складався за поєднання внесення помірної дози мінерального добрива і підживлення в період вегетації препаратами Органік Д2 та Ескорт – біо. Окупність приростом урожайності зерна в зазначених варіантах живлення пшениці озимої сорту Кольчуга склала 25,50–26,50 кг, а сорту Заможність – 31,83‒32,33 кг. Елементи наукової новизни. Набули подальшого розвитку питання ресурсозберігаючого живлення рослин пшениці озимої, у зв’язку з появою нових сортів, препаратів й зміною кліматичних і ґрунтових умов. Практична значущість одержаних результатів полягає в розробці, удосконаленні й впровадженні у виробництво елементів технології вирощування пшениці озимої на чорноземі південному, яка забезпечує приріст урожайності зерна на рівні 1,59–1,94 т/га залежно від сорту. The purpose of the work was improving the elements of the cultivation technology of winter wheat varieties in the conditions of the Southern Steppe of Ukraine on the basis of resource-saving plant nutrition by treating the plants with the growth-regulating preparations during the main vegetation periods on the background of the main applying low doses of mineral fertilizers. Methods of research. Experimental studies were conducted during 2011–2016 in the experimental field of Mykolaiv NAU. The objects of the research were such winter wheat varieties as Kolchuha and Zamozhnist.  Generally accepted methods for the given research area were used in the experiments. The yield was determined by the method of overall mowing from each accounting area. The research results. The studies have shown that, over the years of the research, the winter wheat yield of Kolchuha variety was 2.89–4.48 t/ha, and the yield of  Zamozhnist variety was 3.05–4.99 t/ha, depending on the variant of nutrition. The most effective variant of crop nutrition, over the years of research, was the application of a moderate dose of mineral fertilizers and additional fertilization during the vegetation period with the preparations “Organic D2” and “Escort-bio”. Thus, using these nutrition variants has resulted in yield increasing of Kolchuha winter wheat variety to 25.50–26.50 kg, and of Zamozhnist variety – to 31.83–32.33 kg. The elements of scientific novelty. The questions of the resource-saving nutrition of winter wheat plants, in connection with the appearance of new varieties, preparations and changes of climatic and soil conditions have been considered. The practical significance of the obtained results is the development, improvement and introduction into production of the elements of winter wheat cultivation technology in the Southern black soil, as this crop provides grain yield growth at the level of 1.59–1.94 tons/ha depending on the variety.


2019 ◽  
Vol 10 (1) ◽  
pp. 16-25 ◽  
Author(s):  
V. V. Morgun ◽  
O. O. Stasik ◽  
D. A. Kiriziy ◽  
O. G. Sokolovska-Sergiienko

The response of modern winter wheat varieties to soil drought was studied with aim of phenotyping their drought tolerance characteristics and identification of the most informative indices that may be suitable for use in breeding programs. Plants of winter bread wheat (Triticum aestivum L.) varieties Podolyanka, Khurtovyna, Vinnychanka and Prydniprovska were grown in a pot experiment. The soil moisture for control plants was maintained at a level of 70% of field capacity (FC) throughout the vegetative stage. At the flowering, watering of the treated plants was stopped to reduce the soil moisture to a level of 30% FC and then this soil moisture level was maintained for 10 days. After that, the irrigation of the treated plants was restored to the level of control. It was found that in the flag leaf under drought condition, the chlorophyll content, net CO2 assimilation rate, and transpiration rate decreased, while the leaf water deficit, the ratio of photorespiration to CO2 assimilation, and the activity of chloroplasts antioxidant enzymes (superoxide dismutase and ascorbate peroxidase) increased. The ten-day drought significantly reduced the grain yield from the plant. Calculations of the relative changes in the physiological parameters of treated plants as compared to the control were the most informative for the differentiation of varieties for drought tolerance. Relative changes in the content of chlorophyll in the flag leaf under drought and reduction in the total biomass of the plant closely correlated with a decrease in grain productivity (r = 0.92 and r = 0.96 respectively). There was also a significant correlation of grain productivity with a decrease in the NAR measured in the period of drought (r = 0.68). Therefore, the maintenance of the photosynthetic function of plants under conditions of insufficient water supply plays a determinant role in reducing the grain productivity losses. The relative changes in the chlorophyll content and CO2 assimilation rate in plants subjected to drought as compared to control may be used as markers of drought tolerance of genotypes for genetic improvement of wheat by conventional breeding and biotechnological methods.


Sign in / Sign up

Export Citation Format

Share Document