Relationship between the physiological properties and yield of winter wheat varieties on chernozem soil

The relationship between the yield, chlorophyll content and leaf area index of five winter wheat genotypes was investigated in two different growing seasons on chernozem soil. The results suggest that the genotype and the nutrient supply had a considerable influence on both the yield and the physiological traits, while the growing season modified the parameters in a significant manner. The results proved that the chlorophyll content and leaf area index had a direct influence on the yield; varieties developing larger leaf area and leaf chlorophyll content had higher yields even in different seasons, but the yield was significantly influenced by the decline in the chlorophyll content after flowering. It could be concluded that studying the chlorophyll content and leaf area values simultaneously during the more important phenological phases (especially from flowering to the early period of grain-filling) makes it possible to predict the yield from the trends.

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Warming and straw application increased soil respiration during the different growing seasons by changing crop biomass and leaf area index in a winter wheat-soybean rotation cropland

Geoderma ◽

10.1016/j.geoderma.2021.114985 ◽

2021 ◽

Vol 391 ◽

pp. 114985

Author(s):

Shutao Chen ◽

Jun Wang ◽

Tingting Zhang ◽

Zhenghua Hu ◽

Guoyi Zhou

Keyword(s):

Soil Respiration ◽

Winter Wheat ◽

Leaf Area Index ◽

Leaf Area ◽

Area Index ◽

Growing Seasons ◽

Crop Biomass ◽

Straw Application

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Elaboration of a nitrogen nutrition indicator for winter wheat based on leaf area index and chlorophyll content for making nitrogen recommendations

European Journal of Agronomy ◽

10.1016/j.eja.2006.10.001 ◽

2007 ◽

Vol 27 (1) ◽

pp. 1-11 ◽

Cited By ~ 77

Author(s):

Vianney Houlès ◽

Martine Guérif ◽

Bruno Mary

Keyword(s):

Winter Wheat ◽

Leaf Area Index ◽

Leaf Area ◽

Chlorophyll Content ◽

Nitrogen Nutrition ◽

Area Index

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The effect of arid conditions on productivity and elements of photosynthetic activity of winter soft wheat

Agrarian science ◽

10.32634/0869-8155-2021-345-2-74-77 ◽

2021 ◽

pp. 74-77

Author(s):

I. A. Lobunskaya ◽

E. V. Ionova ◽

V. A. Likhovidova

Keyword(s):

Leaf Area Index ◽

Leaf Area ◽

Chlorophyll Content ◽

Vegetation Period ◽

Wheat Varieties ◽

Area Index ◽

Arid Conditions ◽

Chlorophyll Pigment ◽

Study Results ◽

Moisture Supply

The current paper has presented the estimating results of the effect of vegetation conditions on a leaf area index, preservation of chlorophyll pigment and productivity of the winter common wheat samples developed by the ARC “Donskoy”. The study was conducted in the laboratory of plant physiology in 2017-2020. There has been used the following methodology: the leaf areas were determined by the Nichiporovich's method (1955), the leaf area index during the periods of ear formation and flowering was estimated according to S.A. Tarasenko (2015). The chlorophyll content in the leaves of winter wheat varieties was assessed by the Shmatko's method (1976). The study results have identified that the leaf area indices and the chlorophyll content in leaves during the vegetation period changed according to the drought resistance degree of plants and depended mainly on the root moisture supply and on the studied genotype. In the conditions of insufficient moisture supply the varieties Krasa Dona, Asket, Etyud and Volny Don formed the maximum values of a leaf area index and preservation of chlorophyll pigment.

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Representing winter wheat in the Community Land Model (version 4.5)

Geoscientific Model Development ◽

10.5194/gmd-10-1873-2017 ◽

2017 ◽

Vol 10 (5) ◽

pp. 1873-1888 ◽

Cited By ~ 9

Author(s):

Yaqiong Lu ◽

Ian N. Williams ◽

Justin E. Bagley ◽

Margaret S. Torn ◽

Lara M. Kueppers

Keyword(s):

Heat Flux ◽

Winter Wheat ◽

Leaf Area Index ◽

Leaf Area ◽

Latent Heat Flux ◽

Carbon Allocation ◽

Net Ecosystem Exchange ◽

Area Index ◽

Community Land Model ◽

The Us

Abstract. Winter wheat is a staple crop for global food security, and is the dominant vegetation cover for a significant fraction of Earth's croplands. As such, it plays an important role in carbon cycling and land–atmosphere interactions in these key regions. Accurate simulation of winter wheat growth is not only crucial for future yield prediction under a changing climate, but also for accurately predicting the energy and water cycles for winter wheat dominated regions. We modified the winter wheat model in the Community Land Model (CLM) to better simulate winter wheat leaf area index, latent heat flux, net ecosystem exchange of CO2, and grain yield. These included schemes to represent vernalization as well as frost tolerance and damage. We calibrated three key parameters (minimum planting temperature, maximum crop growth days, and initial value of leaf carbon allocation coefficient) and modified the grain carbon allocation algorithm for simulations at the US Southern Great Plains ARM site (US-ARM), and validated the model performance at eight additional sites across North America. We found that the new winter wheat model improved the prediction of monthly variation in leaf area index, reduced latent heat flux, and net ecosystem exchange root mean square error (RMSE) by 41 and 35 % during the spring growing season. The model accurately simulated the interannual variation in yield at the US-ARM site, but underestimated yield at sites and in regions (northwestern and southeastern US) with historically greater yields by 35 %.

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Spring top-dressings of ‘Nitro-Chalk’ and late sprays of a liquid N-fertilizer and a broad spectrum fungicide for consecutive crops of winter wheat at Saxmundham, Suffolk

The Journal of Agricultural Science ◽

10.1017/s0021859600056021 ◽

1978 ◽

Vol 90 (3) ◽

pp. 509-516 ◽

Cited By ~ 14

Author(s):

A. Penny ◽

F. V. Widdowson ◽

J. F. Jenkyn

Keyword(s):

Calcium Carbonate ◽

Winter Wheat ◽

Leaf Area Index ◽

Ammonium Nitrate ◽

Leaf Area ◽

Broad Spectrum ◽

N Fertilizer ◽

N Content ◽

Area Index ◽

Liquid Fertilizer

SummaryAn experiment at Saxmundham, Suffolk, during 1974–6, tested late sprays of a liquid N-fertilizer (ammonium nitrate/urea) supplying 50 kg N/ha, and a broad spectrum fungicide (benomyl and maneb with mancozeb) on winter wheat given, 0, 50, 100 or 150 kg N/ha as ‘Nitro-Chalk’ (ammonium nitrate/calcium carbonate) in springMildew (Erysiphe graminisf. sp. tritici) was most severe in 1974. It was increased by N and decreased by the fungicide in both 1974 and 1975, but was negligible in 1976. Septoria (S. nodorum) was very slight in 1974 and none was observed in 1976. It was much more severe in 1975, but was unaffected by the fungicide perhaps because this was applied too late.Yield and N content, number of ears and leaf area index were determined during summer on samples taken from all plots given 100 or 150 kg N/ha in spring; each was larger with 150 than with 100 kg N/ha. The effects of the liquid N-fertilizer on yield and N content varied, but leaf area index was consistently increased. None was affected consistently by the fungicide.Yields, percentages of N in, and amounts of N removed by grain and straw were greatly and consistently increased by each increment of ‘Nitro-Chalk’. Yields of grain were increased (average, 9%) by the liquid fertilizer in 1974 and 1975, and most where most ‘Nitro-Chalk’ had been given, but not in 1976 when the wheat ripened in July; however, both the percentage of N in and the amount of N removed by the grain were increased by the liquid fertilizer each year. The fungicide increased the response to the liquid N-fertilizer in 1974, but not in 1975 when Septoria was not controlled, nor in 1976 when leaf diseases were virtually absent.The weight of 1000 grains was increased by each increment of ‘Nitro-Chalk’ in 1975 but only by the first one (50 kg N/ha) in 1974 and 1976; it was very slightly increased by the liquid fertilizer and by fungicide each year.

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Growth and yield of wheat at different dates of sowing under chrland ecosystem of Bangladesh

Journal of the Bangladesh Agricultural University ◽

10.3329/jbau.v14i2.32688 ◽

2017 ◽

Vol 14 (2) ◽

pp. 147-154 ◽

Cited By ~ 1

Author(s):

MM Kamrozzaman ◽

MAH Khan ◽

S Ahmed ◽

N Sultana

Keyword(s):

Growth Rate ◽

Leaf Area Index ◽

Leaf Area ◽

Dry Matter ◽

Block Design ◽

Grain Filling ◽

Crop Growth ◽

Growth And Yield ◽

Area Index ◽

Crop Growth Rate

An experiment was conducted at Sadipur charland under Farming System Research and Development Site, Hatgobindapur, Faridpur, during rabi season of 2012-13 and 2013-14 to study the growth and yield performance of cv. BARI Gom-24 as affected by different dates of sowing under Agro-ecological Zone-12 (AEZ-12) of Bangladesh. The experiment was laid out in randomized complete block design with six replications, comprising five different dates of sowing viz. November 5, November 15, November 25, December 5 and December 15. Results reveal that the tallest plant, leaf area index, total dry matter, and crop growth rate were observed in November 25 sown crop and leaf area index, total dry matter and crop growth rate were higher at booting, grain filling, and tillering stages of the crop. Maximum effective tillers hill-1 (3.49), spikes m-2, (311), number of grains spike-1 (42.20) and 1000-grain weight (52.10 g) were produced by November 25 sown crop exhibited the highest grain (4.30 t ha-1) and straw yield (4.94 t ha-1) as well as harvest index (46.88%) of the crop. Lowest performance was observed both in early (November 5) and late sown crop (December 15). The overall results indicated that November 25 sown crop showed better performance in respect of growth and yield of wheat under charland ecosystem of Bangladesh.J. Bangladesh Agril. Univ. 14(2): 147-154, December 2016

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