The experiment for optimum design of N,P and K fertilization model was conducted to study the influence of different fertilization rate to pumpkin dry matter quality and Vc content.The results showed that N had significant effect on Vc content of pumpkin,and P had significant effect on the content of dry matter,while the influence of N and P,N and K correlation to pumpkin dry matter and Vc content was remarkable.The optimum amount of N,P,and K fertilization was nitrogen N 90~95 kg/hm2,phosphorous P2O5 75~80...
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