水稻专用配方肥的肥效研究

采用“大配方,小调整”策略,采用区域总量控制、分期调控技术,根据磷钾肥衡量监控技术原理,通过不同农户田间小区试验,比较了大配方、小调整和农户习惯处理对水稻产量、氮肥利用率和经济效益的影响.结果表明,与农民习惯施肥处理比较,大配方和小调整处理提高了水稻产量和氮肥偏生产力,平均产量分别增加了4.67％和11.85％,平均氮肥偏生产力分别增加33.45％和42.62％.大配方和小调整处理可以使水稻达到增产、节本、增效的目的,而小调整处理效果优于大配方处理.

Effects of rice special compound fertilizer on rice

In this paper, based on the datum of soil testing and fertilizer project, field plot experiments were conducted to compare treatments of gross formula, minor adjustment and farmers practice on rice yield, partial factor productivity of applied nitrogen and economic benefit. The results showed that, compared with the farmers practice, rice yield and partial factor productivity of applied nitrogen was increased with treatments of gross formula and minor adjustment, which was 4.67% and 11.85%, 33.45% and 42.62%,respectively. Treatments of gross formula and minor adjustment could not only realize the objective of increasing rice yield and saving the cost, but also in prove partial factor productivity of applied nitrogen, of which the treatment of minor adjustment was better than gross formula.