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为探讨连续施用磷肥对水稻生产的经济效益,本站于1982、1983年早、晚稻连续地进行了过磷酸钙不同施用量的肥效效应试验。(一)试验设计和方法在同一地段设固定试验小区。试前土壤混合样分析,pH 值(水提)6.38,速效磷(P_2O_5)12ppm。试验小区面积4厘,3次重复。设5种处理:(1)不施磷(对照);(2)早、晚造各亩施过磷酸钙30斤;(3)早、晚造各亩施过磷酸
In order to explore the economic benefits of continuous application of P fertilizer on rice production, we studied the effects of different application rates of SSP on the late rice in 1982 and 1983 respectively. (A) Test design and method In the same area set up a fixed test plot. Mixed soil samples before the test, pH (water) 6.38, available phosphorus (P_2O_5) 12ppm. Experimental area of 4%, 3 times repeated. There are five kinds of treatments: (1) Phosphate is not applied (control); (2) 30 kg of calcium phosphate is used for morning and evening; (3)