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为了探索磷肥在水稻生产中当造的效果及其后效的持续时间,提供施用磷肥的依据,从1983年早造起,连续三年六造在青山乡大树厂屯时行田间定位试验。现将试验结果分述于后。
In order to explore the effect of phosphate fertilizer in rice production and the duration of its aftereffect, the basis for the application of phosphate fertilizer was provided. From the beginning of 1983, three field tests were conducted in Dashu Village, Qingshan Township for three consecutive years. Now the test results are described later.