Two factors including nitrogen and soil moisture before planting were selected to deci- sion ,use of optimum design and computer technique. Analysing the effects of nitrogen and soil moisture before planting on accurmulation of photosynthates and matter translocation later stage growth and some mathematical function of these pramenters.The results showed that grain yield of wheat mainly produced from capactity of accurmulation of photosynthate after heading,As the increasing of these accurmulations, it will...
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