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前言磷肥是水稻的主要营养元素之一,但是作为磷肥的过磷酸钙,对水稻的肥效各有不同的说法。根据我组1957年的试验以及一般农民反应,认为栽培水稻施用过磷酸钙的效果不大,施用磷矿粉,对水稻有无增产作用,也没有生产或试验证明。为了探讨过磷酸钙对水稻的增产作用,乃进行本项试验。本试验分两部分进行的。第一部分是在校内用同位素P~(32)进行盆体试验,第二部分是在香坊农锡进行田间磷肥施用量的试验。
Preface Phosphate fertilizer is one of the main nutrients of rice, but as a phosphate fertilizer, superphosphate, have different effects on the efficiency of rice. According to our group’s experiment in 1957 and the reaction of the general peasants, it is considered that the effect of applying superphosphate on cultivated rice is not great. Application of phosphate rock powder has no effect on rice yielding and no evidence of production or experiment. In order to investigate the effect of superphosphate on rice yield, this experiment was carried out. The experiment is divided into two parts. The first part is the experiment of isotope P ~ (32) in the school and the second part is the experiment of field phosphate fertilizer application in Xiangfangnong tin.