Improved wheat grain yield by a new method of root selection

Field trials at Beverley (19911, Salmon Gums (1991; 2 sites) and Merredin (1992; 2 sites), each with 5 rates of nitrogen (N) and 3 levels of weed control, were used to investigate the effect of weeds and N on wheat grain yield and protein concentration during 1991 and 1992. Weeds in the study were grasses (G) and broadleaf (BL). Weeds reduced both vegetative dry matter yield and grain yield of wheat at all sites except for dry matter at Merredin (BL). Nitrogen fertiliser increased wheat dry matter yield at all sites. Nitrogen increased wheat grain yield at Beverley and Merredin (BL), but decreased yield at both Salmon Gums sites in 1991. Nitrogen fertiliser increased grain protein concentration at all 5 sites-at all rates for 3 sites [Salmon Gums (G) and (BL) and Merredin (G)] and at rates of 69 kg N/ha or more at the other 2 sites [Beverley and Merredin (BL)]. However, the effect of weeds on grain protein varied across sites. At Merredin (G) protein concentration was higher where there was no weed control, possibly due to competition for soil moisture by the greater weed burden. At Salmon Gums (G), grain protein concentration was greater when weeds were controlled than in the presence of weeds, probably due to competition for N between crop and weeds. In the other 3 trials, there was no effect of weeds on grain protein. The effect of weeds on grain protein appears complex and depends on competition between crop and weeds for N and for water at the end of the season, and the interaction between the two.

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Comparisons of Two Hand-Held, Multispectral Field Radiometers and a Hyperspectral Airborne Imager in Terms of Predicting Spring Wheat Grain Yield and Quality by Means of Powered Partial Least Squares Regression

Journal of Near Infrared Spectroscopy ◽

10.1255/jnirs.892 ◽

2010 ◽

Vol 18 (4) ◽

pp. 247-261 ◽

Cited By ~ 18

Author(s):

Stein Ivar Øvergaard ◽

Tomas Isaksson ◽

Knut Kvaal ◽

Audun Korsaeth

Keyword(s):

Grain Yield ◽

Least Squares ◽

Partial Least Squares ◽

Spring Wheat ◽

Partial Least Squares Regression ◽

Least Squares Regression ◽

Wheat Grain ◽

Yield And Quality ◽

Grain Yield And Quality

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The traits affecting wheat grain yield and determining tolerant genotypes using drought indices

Cereal Research Communications ◽

10.1007/s42976-021-00225-2 ◽

2021 ◽

Author(s):

Davood Daei Alhag ◽

Varahram Rashidi ◽

Saeed Aharizad ◽

Farhad Farahvash ◽

Bahram Mirshekari

Keyword(s):

Grain Yield ◽

Drought Indices ◽

Wheat Grain

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CO2-Induced Changes in Wheat Grain Composition: Meta-Analysis and Response Functions

Agronomy ◽

10.3390/agronomy7020032 ◽

2017 ◽

Vol 7 (2) ◽

pp. 32 ◽

Cited By ~ 37

Author(s):

Malin Broberg ◽

Petra Högy ◽

Håkan Pleijel

Keyword(s):

Grain Yield ◽

Meta Analysis ◽

N Uptake ◽

Co2 Concentration ◽

Gradual Change ◽

Response Functions ◽

Wheat Grain ◽

Negative Effects ◽

Mineral Concentration ◽

Protein Nitrogen

Elevated carbon dioxide (eCO2) stimulates wheat grain yield, but simultaneously reduces protein/nitrogen (N) concentration. Also, other essential nutrients are subject to change. This study is a synthesis of wheat experiments with eCO2, estimating the effects on N, minerals (B, Ca, Cd, Fe, K, Mg, Mn, Na, P, S, Zn), and starch. The analysis was performed by (i) deriving response functions to assess the gradual change in element concentration with increasing CO2 concentration, (ii) meta-analysis to test the average magnitude and significance of observed effects, and (iii) relating CO2 effects on minerals to effects on N and grain yield. Responses ranged from zero to strong negative effects of eCO2 on mineral concentration, with the largest reductions for the nutritionally important elements of N, Fe, S, Zn, and Mg. Together with the positive but small and non-significant effect on starch concentration, the large variation in effects suggests that CO2-induced responses cannot be explained only by a simple dilution model. To explain the observed pattern, uptake and transport mechanisms may have to be considered, along with the link of different elements to N uptake. Our study shows that eCO2 has a significant effect on wheat grain stoichiometry, with implications for human nutrition in a world of rising CO2.

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Winter wheat grain yield in response to different production practices and soil fertility in northern China

Soil and Tillage Research ◽

10.1016/j.still.2017.10.001 ◽

2018 ◽

Vol 176 ◽

pp. 10-17 ◽

Cited By ~ 12

Author(s):

Lifang Wang ◽

Jutao Sun ◽

Zhengbin Zhang ◽

Ping Xu ◽

Zhouping Shangguan

Keyword(s):

Winter Wheat ◽

Soil Fertility ◽

Grain Yield ◽

Northern China ◽

Wheat Grain ◽

Production Practices

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Increasing of wheat grain yield by use of a liquid fertilizer

Advance in Biological Research ◽

10.26855/abr.2020008 ◽

2020 ◽

Vol 1 (1) ◽

pp. 45-49

Author(s):

Tsotne Samadashvili ◽

Gulnari Chkhutiashvili ◽

Mirian Chokheli ◽

Zoia Sikharulidze ◽

Qetevan Nacarishvili

Keyword(s):

Winter Wheat ◽

Grain Yield ◽

Stem Elongation ◽

Organic Fertilizer ◽

Wheat Yield ◽

Mineral Fertilizer ◽

Field Trials ◽

Early Spring ◽

Wheat Grain ◽

Liquid Fertilizer

Wheat is a vital crop in Georgia and in the world. Because of the increase in the rate of population growth, improving the grain yield is the way to meet food demand. Proper crop nutrition plays a vital role in maintaining the world’s food supply. Fertilizer is essential for accomplishing this.One of the most important means for increasing the wheat yield is fertilizer, especially, organic fertilizer. The present research was carried out to study the effects of different doses (150ml, 200ml and 300 ml on ha) of humic organic fertilizer “Ecorost” on yield of winter wheat cultivar “Tbilisuri 15”. The humic liquid fertilizer "Ecorost" is a peat-based organic-mineral fertilizer. The product is active and saturated due to the use of the latest technology and living bacteria found in peat. The field trials were conducted in 2017-2019 at the Experimental Site of Scientific Research Center of Agriculture in Dedopliskharo- arid region (Eastern Georgia).Liquid fertilizer was applied two times: in tillering stage in early spring and two weeks after - in stem elongation stage. Results indicated that the highest wheat grain yield (4t/ha) was achieved when the plants were fertilized with 300 ml on 1 ha ofEcorost. Applications of liquid fertilizer “Ecorost” increased grain yield of winter wheat by 16.2% in comparison with standard nitrogen fertilization. Thus, liquid fertilizer “Ecorost” had a significant effect on wheat grain yield compared to control standard nitrogen fertilizer.

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