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在肥料结构调查中发现,磷肥盲目施用也时有所见。占调查总数10％左右的农户施磷量为作物需要量的3—5倍以上,有的一季水稻每亩施了12公斤磷(P_2O_5)的过磷酸钙。Pedro(1980)对于旱地大用量(每公顷施P500—1000公斤)施磷的优越性作过评述;对于水稻超量施磷的作用还少见报导,为此作了本研究。
Found in the fertilizer structure survey, blind application of phosphate fertilizer is also seen from time to time. About 10% of the total surveyed peasants applied more than 3-5 times of crop demand, and some of them used 12 kg of phosphorus (P2O5) superphosphate per acre. Pedro (1980) reviewed the advantages of high phosphorus (500-1000 kg per hectare) applied phosphorus in paddy fields. The effect of excess phosphorus application on rice was seldom reported, and this study was made for this purpose.