scholarly journals Вплив строків сівби на продуктивність гречки

2018 ◽  
pp. 166-171
Author(s):  
М. С. Ульянченко
Keyword(s):  
Grain Size ◽  
Sowing Date ◽  
Fagopyrum Esculentum ◽  
Air Separation ◽  
Forest Steppe ◽  
Average Value ◽  
Sowing Dates ◽  
Fagopyrum Esculentum Moench ◽  
Exact Effect ◽  
Seed Yields

На фоні нестабільних погодних умов весняного періоду, що відмічаються останнім часом, встановлення оптимальних строків сівби районованих сортів гречки набуває актуального значення. У статті експериментальним шляхом вивчали шість сортів гречки (Fagopyrum esculentum Moench) вітчизняної селекції: Ярославна, Слобожанка, Руслана, Українка, Крупинка, СИН-3/02 залежно від строків сівби в умовах нестійкого зволоження центрального Лісостепу. Для проведення досліджень використовували загальноприйняті та спеціальні методики: продуктивність сортів гречки та аналіз зернового матеріалу за елементами продуктивності визначали після очищення зерна методом повітряної сепарації та перерахунку на стандартну 14 % вологість. Для умов 2015 року встановлено, що елементи продуктивності гречки (крупність та кількість зерен з рослини) мають суттєвий вплив на формування продуктивності культури. За масою 1000 зерен виокремилися сорт Крупинка за раннього строку сівби, суттєво менші значення отримали за цим показником у сортів Слобожанка та Українка, відповідно, за сівби в перший та другий строк. Усі інші сорти за крупністю зерна мали середнє значення. Строки сівби сорту СИН-3/02 не мали впливу на елементи продуктивності. В умовах 2016 року за крупністю зерна виокремилися сорти Ярославна, Руслана та Крупинка за раннього та середнього строків сівби. Всі сорти, що  вивчалися, забезпечили вищу крупність зерна за раннього строку сівби, за виключенням сортів Ярославна та Українка. За результатами дворічних досліджень визначено, що ранньостиглі сорти гречки Ярославна і Руслана доцільно висівати з середини першої декади травня. Сорти Слобожанка і Крупинка формують найбільшу продуктивність за сівби в перший та другий строк. Чіткого впливу терміну сівби на даний показник у сортів СИН-3/02 та Українка не виявлено. The set of optimal sowing dates of the buckwheat is to the actual value on the background of unstable weather of the springtime. In the article, six species of buckwheat (Fagopyrum esculentum Moench) of domestic breeding: Yaroslavna, Slobozhanka, Ruslana, Ukrainka, Krupynka, SIN-3/02 were studied experimentally, depending on the time of sowing in conditions of unstable moisture of the Central Forest-Steppe. For research, conventional methods and special methods were used: productivity of buckwheat varieties and analysis of grain material by the elements of productivity were determined after purification of the grain by air separation method and converted to a standard 14 % moisture content. For the 2015 conditions it has been established that the elements of the buckwheat productivity: the size and number of grains from the plant have a significant effect on the formation of the productivity of the crop. By weight of 1000 grains, Krupynka variety was distinguished at early term sowings; significant lower values ​​were obtained for this variety in Slobozhanka and Ukrainka, respectively for sowing in the first and second terms. All other varieties according to grain size had an average value. The lines of sowing of the variety SIN-3/02 did not influence the elements of productivity. In the conditions of 2016, the varieties Yaroslavna, Ruslana and Krupynka were distinguished by grain size for early and medium term sowing. All varieties put on the study ensured a higher grain size in early sowing, with the exception of Yaroslavna and Ukrainka varieties. According to the results of two-year studies, it has been determined that early varieties of buckwheat Yaroslavna and Ruslana should be sown from the middle of the first decade of May. Sloboda and Krupynka grades produce the highest seed yields in the first and second lines. The exact effect of the sowing date on this indicator in the varieties SIN-3/02 and Ukrainka was not detected.

INTERACTION OFCULTIVAR, SOWING DATE AND SOWING RATE ON LODGING, YIELD AND SEED WEIGHT OF BUCKWHEAT

1977 ◽  
Vol 57 (2) ◽  
pp. 317-321 ◽  
Author(s):  
G. H. GUBBELS
Keyword(s):  
Seed Weight ◽  
Sowing Date ◽  
Fagopyrum Esculentum ◽  
The Third ◽  
Sowing Dates ◽  
Fagopyrum Esculentum Moench

Two buckwheat (Fagopyrum esculentum Moench.) cultivars, Tokyo and Tempest, were grown in 1971, 1972 and 1973 at 8.5, 17, 34 and 68 kg/ha sowing rates and at early, mid- and late June sowing dates. Tempest lodged more than Tokyo, particularly in 1971. Yield generally declined with each delay in sowing. In 1971, yield increased with each increase in sowing rate, while in 1972 there was no difference due to rate. In 1973, yield increased to the third rate and levelled out to the fourth. Therefore, a sowing rate of over 34 kg/ha may be required to assure good yields each year. Seed weight tended to decrease with delay in sowing but was not affected by sowing rate.

Variation in branch length in Fagopyrum esculentum in response to density and emergence date: No evidence for true plasticity

Botany ◽  
2009 ◽  
Vol 87 (9) ◽  
pp. 888-892 ◽  
Author(s):  
Wisdom Japhet ◽  
Daowei Zhou ◽  
Ping Wang
Keyword(s):  
Branch Length ◽  
Sowing Date ◽  
Fagopyrum Esculentum ◽  
Planting Density ◽  
Total Biomass ◽  
Heterogeneous Environments ◽  
Sowing Dates ◽  
Allometric Analysis ◽  
Fagopyrum Esculentum Moench ◽  
Emergence Date

Plasticity is an important attribute that enables plants to maintain fitness in heterogeneous environments. The objective of this study was to investigate plasticity in branch length in Fagopyrum esculentum Moench. Seeds of the species were sown under two contrasting conditions through the manipulation of planting density (inter-planting distances at 20, 15, 10, and 5 cm) and sowing date (25 July, 1 August, 5 August, and 15 August). Allometric analysis of the relationships between branch length and total biomass showed a significant (p < 0.05) departure from isometry. This indicates that branch length increased linearly as a function of size. However, branch length was smaller in the group of plants sown at higher densities and at late sowing dates. True plasticity, which would have been indicated by significant differences in allometric exponents within treatments, was not observed in this study. Our results suggest that the differences observed in branch length were due to the direct effect of size rather than as a result of true plastic investment in branches.

scholarly journals Estimation of buckwheat leaf area by leaf dimensions

2021 ◽  
Vol 42 (3Supl1) ◽  
pp. 1529-1548
Author(s):  
Alberto Cargnelutti Filho ◽  
◽  
Rafael Vieira Pezzini ◽  
Ismael Mario Márcio Neu ◽  
Gabriel Elias Dumke ◽  
...  
Keyword(s):  
Leaf Area ◽  
Linear Model ◽  
Leaf Blade ◽  
Sowing Date ◽  
Quadratic Model ◽  
Digital Photo ◽  
Sowing Dates ◽  
Leaf Dimensions ◽  
Fagopyrum Esculentum Moench ◽  
Uniformity Trials

The objective of this work was to model and identify the best models for estimating the leaf area, determined by digital photos, of buckwheat (Fagopyrum esculentum Moench) of the cultivars IPR91-Baili and IPR92-Altar, as a function of length (L), width (W) or length x width product (LW) of the leaf blade. Ten uniformity trials (blank experiments) were carried out, five with IPR91-Baili cultivar and five with IPR92-Altar cultivar. The trials were performed on five sowing dates. In each trial and cultivar, expanded leaves were collected at random from the lower, middle and upper segments of the plants, totaling 1,815 leaves. In these 1,815 leaves, L and W were measured and the LW of the leaf blade was calculated, which were used as independent variables in the model. The leaf area of each leaf was determined using the digital photo method (Y), which was used as a dependent variable of the model. For each sowing date, cultivar and thirds of the plant, 80% of the leaves (1,452 leaves) were randomly separated for the generation of the models and 20% of the leaves (363 leaves) for the validation of the models of leaf area estimation as a function of linear dimensions. For buckwheat, IPR91-Baili and IPR92-Altar cultivars, the quadratic model (Ŷ = 0.5217 + 0.6581LW + 0.0004LW2, R2 = 0.9590), power model (Ŷ = 0.6809LW1.0037, R2 = 0.9587), linear model (Ŷ = 0.0653 + 0.6892LW, R2 = 0.9587) and linear model without intercept (Ŷ = 0.6907LW, R2 = 0.9587) are indicated for the estimation of leaf area determined by digital photos (Y) based on the LW of the leaf blade (x), and, preferably, the linear model without intercept can be used, due to its greater simplicity.

scholarly journals The Major Chemical Constituents of Teosinte Grown as Mono and Mixed Cropping with Legumes in different Sowing Date

2021 ◽  
Vol 7 ◽  
pp. 44-53
Author(s):  
Birendra Khanal ◽  
Naba Raj Devkota ◽  
Megh Raj Tiwari ◽  
Neena Amatya Gorkhali
Keyword(s):  
Chemical Constituents ◽  
Sowing Date ◽  
Neutral Detergent Fiber ◽  
Mixed Cropping ◽  
Mean Values ◽  
Average Value ◽  
Sowing Dates ◽  
Main Plot ◽  
Major Chemical

Teosinte (Euchlaena mexicana) is one of the most popular summer growing cereal fodder, yet with comparatively low level of chemical constituents. The quality of this fodder can be improved through better by cultivation management including sowing dates and mixed cropping with legume. The main objective of this study was to determine the forage quality as reflected by major chemical constituents of pure stands of teosinte and binary mixtures of teosinte with commonly available legumes under different dates of sowing. Four fodder combinations; teosinte mono crop, teosinte+ cowpea, tesosinte+ rice bean, and teosinte+ lablab bean was arranged to cultivate in three different date of sowing in the field in a Split Plot Design with 5 replications. Main plot treatments were different sowing dates and sub-plot treatments were combinations of fodder species. Dry herbage mass production, crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), acid detergent lignin (ADL) and Ash were determined. The results showed that the significantly the highest Dry herbage and CP were obtained from fodder combination teosinte+ cowpea if sown at 18th April, whereas the significantly highest mean values of ADF and NDF were obtained for teosinte mono fodder crop. However, the lowest average value of ADF and NDF was obtained for fodder combination teosinte with cowpea. The average value of Ash and ADL of both harvest for fodder combination and date of sowing was statistically similar (p>0.05). The effect of treatments interaction/combination on cumulative dry herbage was statistically high (p<0.05) when teosinte+ cowpea was sown at 18th April. However, effect of treatments interaction/combination on average value of CP, NDF, ADF, ADL and Ash of both harvests (g/kg DM) was statistically similar (p>0.05). The results showed that mixture of teosinte with cowpea sown at 18th April could be the best combination in terms of quantity as well as for major chemical constituents that could reflect better quality of fodder harvest.

scholarly journals Variability in 1000 kernel weight of winter bread wheat (Triticum aestivum L.) genotypes depending on ecological and agrotechnical factors

2021 ◽  
Author(s):  
O. Demydov ◽  
I. Pravdziva ◽  
V. Hudzenko ◽  
O. Demyanyuk ◽  
N. Vasylenko
Keyword(s):  
Winter Wheat ◽  
Green Manure ◽  
Growing Season ◽  
Sowing Date ◽  
Triticum Aestivum L ◽  
Kernel Weight ◽  
Forest Steppe ◽  
General Tendency ◽  
Preceding Crop ◽  
Sowing Dates

In the ecological conditions of the central part of the Ukrainian Forest-Steppe (The V. M. Remeslo Myronivka Institute of Wheat, NAAS of Ukraine) the influence of growing season conditions (2016-17–2018-19), sowing dates (September 26, October 5, October 16) and different preceding crops (green manure, mustard, soybean, sunflower, corn) on variability of 1000 kernel weight of seventeen modern genotypes of winter wheat was investigated. Under environments of the central part of the Ukrainian Forest-Steppe, significant variability in the trait depending on the factors under study was revealed. Part of sum square for the growing season conditions in the variation of 1000 kernel weight of winter wheat was the most (63.2%). Part of sum square for genotype was 7.0%, for preceding crop it was 4.8%, for sowing dates it was 0.4%. In terms of growing season, the variation in part of sum square was 23.5–30.1% for genotype, 12.7–39.8% for preceding crop, 0.8–6.1% for sowing date, and 2.0–26.5% for interactions between them. During the period of the study, on average for all genotypes, the maximum 1000 kernel weight was obtained after green manure (42.6 g), the least one was after soybean (39.0 g). When changing the sowing dates from September 26 to October 16, it was revealed a general tendency of decrease 1000 kernel weight after the preceding crops mustard, sunflower, corn, and soybean. Significant differences in the response of genotypes under study on the sowing dates after different preceding crops were revealed. The most influence on 1000 kernel weight was established for preceding crops in the variety MIP Darunok and for sowing dates in the variety MIP Vidznaka. There were distinguished the varieties Trudivnytsia myronivska, Balada myronivska, MIP Dniprianka, Avrora myronivska, MIP Darunok which significantly exceeded the standard by 1000 kernel weight on average through the growing season conditions, sowing dates, and preceding crops.

scholarly journals Sowing dates and node emission in buckwheat cultivars

2021 ◽  
Vol 42 (1) ◽  
pp. 105-122
Author(s):  
Alberto Cargnelutti Filho ◽  
◽  
Ismael Mario Márcio Neu ◽  
Rafael Vieira Pezzini ◽  
Gabriel Elias Dumke ◽  
...  
Keyword(s):  
Linear Regression ◽  
Fagopyrum Esculentum ◽  
Main Stem ◽  
Vegetative Development ◽  
Final Number ◽  
Sowing Dates ◽  
Fagopyrum Esculentum Moench

The aim of this study was to determine the rate of node appearance (RNA), the final number of nodes (FNN) and the period of node emission (PNE) in two buckwheat cultivars (Fagopyrum esculentum Moench) for different sowing dates, and to check variability in the RNA, FNN and PNE between the cultivars and sowing dates. The IPR91-Baili and IPR92-Altar cultivars were evaluated for 29 and 31 sowing dates from October to May in the 2017/2018 and 2018/2019 agricultural years respectively. In each experiment, a completely randomised design with five replications was used. The number of nodes (NN) on the main stem was counted twice a week in each plant (replication), from emission of the first node until the end of the cycle. The linear regression (y = a + bx) of the number of nodes (NN, y) was adjusted for each plant based on the number of days after emergence (DAE, x). The rate of node appearance (RNA), in days node-1, was determined from the inverse of the slope of the linear regression between NN and DAE (RNA = 1/b). The RNA was calculated for the period of node emission (PNE, in days), i.e. from emergence to emission of the last node. The final number of nodes (FNN) was counted at the end of node emission. Variability was found in the rate of node appearance (RNA), the final number of nodes (FNN) and the period of node emission (PNE) between the cultivars and sowing dates. The rate of node appearance ranges between 2.20 and 8.23 days node-1, the final number of nodes between 2.20 and 17.20, and the period of node emission between 16.60 and 49.20 days. Plants of the IPR91-Baili and IPR92-Altar cultivars show better vegetative development (lower RNA, higher FNN and greater PNE) when sown in November, December, January and February, compared to those sown in October, March, April and May.

scholarly journals Formation and variability of test weight in winter bread wheat genotypes (Triticum aestivum L.) depending on the growing season conditions, preceding crops and sowing dates

2021 ◽  
Author(s):  
O. A. Demydov ◽  
◽  
V. М. Hudzenko ◽  
І. V. Pravdziva ◽  
N. V. Vasylenko ◽  
...  
Keyword(s):  
Bread Wheat ◽  
Green Manure ◽  
Growing Season ◽  
Sowing Date ◽  
Test Weight ◽  
Forest Steppe ◽  
General Tendency ◽  
Wheat Genotypes ◽  
Winter Bread Wheat ◽  
Sowing Dates

The study aimed to identifying peculiarities of formation and variability of grain test weight in winter bread wheat genotypes depending on the growing season conditions, sowing dates and different preceding crops. The studies were conducted at The V.M. Remeslo Myronivka Institute of Wheat of the NAAS of Ukraine during 2016-17–2018-19 growing seasons. There were estimated 17 winter bread wheat genotypes that were sown in three sowing dates after five preceding crops. Test weight was evaluated according to the State Standard 10840–64. Statistical processing was performed with using programs Statistica 8.0, Excel 2013. It was revealed the significant effect of growing season conditions on grain test weight in winter bread wheat varieties in environments of Ukrainian Forest-Steppe. Significant differences in responses of the genotypes under study on sowing date after different preceding crops were revealed. The most effect of sowing dates on test weight was established in the variety MIP Vidznaka, while the most effect of preceding crops was established in the varieties MIP Yuvileina, Podolianka, MIP Lada, and MIP Darunok. In general, maximal test weight was formed after green manure and the minimal one was after soybeans as preceding crop. The general tendency of decrease in grain test weight with shift in sowing dates from September 26 to October 16 after preceding crops green manure, mustard, sunflower, soybeans was revealed. The sowing date October 05 was optimal for the varieties MIP Valensiia, Estafeta myronivska, MIP Lada after green manure, for the varieties Podolianka, Trudivnytsia myronivska, Hratsiia myronivska, MIP Dniprianka, MIP Lada after mustard, for the varieties Podolianka, Trudivnytsia myronivska, Balada myronivska, Hratsiia myronivska, MIP Assol after sunflower, for the varieties Trudivnytsia myronivska, Estafeta myronivska after maize, for the varieties Podolianka, Trudivnytsia myronivska after soybeans. The varieties MIP Vyshyvanka, Trudivnytsia myronivska, Balada myronivska, Estafeta myronivska, MIP Dniprianka, MIP Vidznaka, and MIP Yuvileina were identified which exceeded significantly the standard variety Podolianka in test weight on average by years of the research, sowing dates, and preceding crops.

scholarly journals Efect of sowing dates and seed rates of flax intercropped with sugar beet on productivity of both crops and competitive relationships

2021 ◽  
Vol 26 (6) ◽  
pp. 3074-3089
Author(s):  
ASEM M. K. ABD-RABBOH ◽  
YASER MAZROU ◽  
AMAL M. A. EL-BORHAMY ◽  
WILLIAM K. L. ABDELMASIEH ◽  
YASER HAFEZ ◽  
...  
Keyword(s):  
Sugar Beet ◽  
Maximum Yield ◽  
Sowing Date ◽  
Economic Return ◽  
Zone Length ◽  
Yield And Quality ◽  
Sowing Dates ◽  
Yield Quality ◽  
Seed Yields ◽  
Flax Straw

The aim of intercropping flax on sugar beet is to increase the cultivated area with flax due to widely cultivated area of sugar beet. So, a field experiment was carried out to study the effect of various sowing dates and seed rates of flax intercropped with sugar beet on yield, quality and economic evaluation. The main-plots were assigned to three sowing dates of flax intercropped with sugar beet and the sub-plots were allocated to four seed rates of flax. The results show that sowing date of flax after 35 days from sowing (DFS) sugar beet resulted in the highest values of sugar beet yields and quality. Maximum values of flax straw and seed yields resulted from sowing flax after 21 DFS sugar beet. Intercropping sugar beet with flax at 12.5% from recommended seed rate on top sugar beet terraces attained the most elevated values of sugar beet yield and quality. Sowing flax at 50% from recommended rate resulted in the best values of flax technical and fruiting zone length, also straw and seed yield/hectare. The maximum yield and economic return of both crops were obtained from sowing flax at 12.5% from recommended rate after (21 or 35) DFS sugar beet.

Comparison of the effects of autumn and spring sowing date on growth and yield of combining peas (Pisum sativutn L.)

1985 ◽  
Vol 104 (1) ◽  
pp. 35-46 ◽  
Author(s):  
S. N. Silim ◽  
P. D. Hebblethwaite ◽  
M. C. Heath
Keyword(s):  
Seed Yield ◽  
Dry Matter ◽  
Sowing Date ◽  
Winter Survival ◽  
Growth And Yield ◽  
Yield Data ◽  
Matter Production ◽  
Sowing Dates ◽  
Seed Yields ◽  
Spring Sowing

SummaryExperiments were conducted between 1978 and 1981 to investigate the effect of autumn and spring sowing on emergence, winter survival, growth and yield of combining peas (varieties ‘Frimas’, ‘Filby’ and ‘Vedette’). Effects of growth regulator PP 333 (Paclobutrazol, ICI pic) application and defoliation on winter survival of Filby were also investigated. Field emergence of autumn-sown Frimas (winter hardy) was less than Vedette or Filby but percentage winter survival was greater. PP 333 application, but not defoliation, increased percentage winter survival of Filby sown in September. Total dry-matter production and photosynthetic area of autumn- compared with spring-sown crops varied considerably between seasons. Yield data indicated that autumn-sown crops produce similar seed yields to spring sowings when winter survival is adequate. November sowings matured 2–4 weeks before March-sown crops, depending on variety and season. Optimum sowing dates were mid-November and early March. Large seed-yield reductions occurred when sowing was delayed until mid-April.

Sign in / Sign up

Export Citation Format

Share Document