小麦氮磷化肥效应与经济施肥研究

STUDIES ON THE RESPONSE TO FERTILIZER OF N,P_2O_5 AND ITS ECONOMIC APPLICATION IN WHEAT

对山东省棕壤、褐土、潮土、砂姜黑土等主要土类的麦田经济施用氮磷化肥进行试验研究。经综合分析,各土类低肥力麦田平均施 N 7.4kg、P_2O_55.0kg、氮磷比1∶0.67最经济;中肥力麦田平均亩施 N8.2kg、P_2O_54.4kg,氮磷比1∶0.53最经济;高肥力麦田平均亩施N9.1kg、P_2O_54.1kg、氮磷比1∶0.45最经济。不同土类上,氮、磷化肥肥效总的趋势是:棕壤>褐土>潮土>砂姜黑土。

Research was taken in 4 years at 141 spots among 20 counties in Shandong Province about the utilization of N,P fertilizers in the main sorts of soil such as brown soil,drab soil ,damp soil and sand ginger black soil etc.The results showed that in the low,medium and high fertilized wheat field of all sorts of soil,the most economic application of pure N, P_2O_5and N:P_2O_5 were that 7.4 kg,5.0kg and 1..0.67;8.2kg,4.4kg and 1:0.53;9kg,4.1kg and 1.0.45 respectively.The response to N,P fertilizer was that brown soil,drab soil >damp soil>sand ginger soil.