Variation of carbohydrate and nitrogen compounds in summer soybean plants and their effects on seed yield
1987
Zheng Piyao | Cao Jiaxi | Wang Ruifang (Beijing Agricultural Univ. (China). Dept. of Agronomy)
The total available carbohydrate in leaves of summer sown soyabean plants varied with developmental stages. Pod number was significantly correlated to total N accumulation in the leaves, which was decreasing with the seed development. There was a marked correlation between seed yield and N accumulation in the leaves at flowering-filling (r=0.674-0.813). N application at the beginning of flowering had a significant increasing effect on the total N and carbohydrate accumulation which consequently resulted in a higher yield. Early reduction of total N in the leaves suggested that N was a crucial factor respons1165ible for the seed yi
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