2010•Unpublished venueRequires access
Effect of sowing date and density on grain yield and nutrition quality and physiological index of wheat.
Guixia Yang, Zhao GuangCai, Ke Xu, Chang XuHong, Yushuang Yang, Shaokang Ma, Feng Ming, Fengjiao Xu
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Abstract
To study the effects of sowing date and density on grain yield and nutrition quality and physiological index of winter wheat,a field experiment using medium-gluten wheat cultivar Zhongren 1 with three sowing dates and four densities was conducted in Beijing experiment site of the Institute of Crop Sciences,Chinese Academy of Agricultural Sciences in 2008-2009 growth seasons.The result showed that the chlorophyll contents of early sowing(September 29) and proper sowing(October 7) were higher than that of late sowing(October 30) after flag leaf spreading from 0 to 28 days,however,the chlorophyll content of late sowing(October 30) was higher than that of early sowing(September 29)and proper sowing(October 7) during late growth stage,density treatments had no significant(P0.05) effect on the chlorophyll content.The average N content of flag leaf with late sowing was higher than that of the early sowing and proper sowing by 7%and 4%,respectively.However,there was no significant difference(P0.05) in density treatments.Sowing date had significant influence(P0.05) on grain yield and its components,moreover,grain yield and protein yield of proper sowing were markablely higher than that of early sowing and late sowing.There were no significant differences(P0.05) in the grain yield and its components in density treatments except numbers of grains per spike.Sowing date had significant effect on albumin,gliadin and crude protein,however,sowing date had no significant influence on globulin and glutenin,in addition,crude protein of A2 treatment was the highest.Protein content and its components contents were no significant differences(P0.05) in different densities except globulin.In summerize,the A2B2 treatment was the best concerning protein yield and grain yield,A2B1 treatment was the best for nutrition quality.Significant positive correlations were found between the chlorophyll content with Albumin and Globulin at 21 days after flag leaf spreading(r=0.73** r=0.57*).