磷酸镁铵缓释肥在旱稻上的减肥增效试验研究

Study on the Effects of Fertilizer Reduction with Efficiency Increase by Appling Struvite on Upland Rice

针对旱稻生产中化肥的施用利用率不高的现象,本文应用具有改善根际生物多样性功能的生物质小分子磷酸钙镁缓释肥,在不减少和减少肥料施用量两种情况下探讨其对旱稻减肥增效的作用。结果表明,不减肥施用磷酸钙镁缓释肥和减肥施用磷酸钙镁缓释肥,均能提高水稻根系活力和叶绿素含量,增加有效穗数;磷酸钙镁缓释肥不减肥处理比常规用肥处理增产7.8%,磷酸钙镁缓释肥减肥处理与常规用肥处理产量相当,可避免化学肥料的浪费和减缓农业面源污染。

In view of the phenomenon of excessive fertilizer application with low efficacy in upland rice production,we conducted a trial of appling upland rice with Struvite,which is a citrate soluble natural crystal fertilizer and can improving rhizosphere biodiversity,in reducing chemical fertilizer amounts and increasing fertilizers efficiency.The results showed that applying Struvite and reduced Struvite can obtain equivalent upland rice yield compared with the conventional fertilization,but it can avoid the waste of chemical fertilizer and slow down the agricultural non-point source pollution.Applying Struvite in both cases can improve upland rice root activity and increase chlorophyll content and effective panicles.