黄土高原地区南瓜优质施肥模式研究

安塞试验站2005~2006连续两年采用N、P、K三因素最优设计,田试不同施肥量对南瓜Vc和干物质两项营养品质的影响,探讨南瓜优质的N、P、K肥效反应模式。结果表明,N肥对南瓜Vc含量的影响最大,K肥对干物质含量的影响最大,N与P交互作用和N与K交互作用对南瓜Vc、干物质含量影响显著。筛选出南瓜优质的较佳施肥量为:施氮90~95 kg/hm2,施磷75~80 kg/hm2,施钾25~30 kg/hm2。N∶P2O5∶K2O=1.00∶0.83∶0.28

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...