2010•Shanghai nongye xuebaoRequires access
Study on the fertilizer rates in high yield culture of direct-seed rape with double low content in rapeseed.
Jiang QiGen, Fei QuanFeng, Li XiuLing, Qian YiFang
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Abstract
By using general quadratic rotational combination design,field experiments of fertilizer rates influencing the direct-seed rape yield were carried out,and mathematical models of fertilizer rates used for high yield culture of direct-seed rape with double low content in rapeseed were set up. The study showed that in order for the rapeseed yield to be over 2 100 kg/hm~2,the application rates of nitrogen,calcium superphosphate and potassium chloride should be 243.30～256.50 kg/hm~2,554.55～628.95 kg/hm~2 and 159.00～191.40 kg/hm~2,respectively.The descending order of fertilizer factors was NPK in effect on rapeseed yield.