缓释型配方肥在晚稻套播油菜上的应用效果

Application Effect of Slow-released Formula Fertilizer onInterplanting Oilseed Rape ( Brassica napus ) in Late Rice

2016~2018年在长江中游三熟制区(江西进贤)开展田间试验,初步探究了缓释型配方肥(N∶P2O5∶K2O=25∶7∶8,及5%其他中微量元素)在晚稻套播油菜上的施用效果,从而为套播油菜轻简化施肥提供参考。结果表明:在油稻稻三熟制秸秆还田下,相比不施肥处理,分次施常规肥和一次性基施配方肥处理均显著增加了套播油菜产量和收入;缓释型配方肥在减少肥料养分投入且一次性基施的情况下,仍能达到甚至优于常规肥分次施用的效果。对于晚稻套播油菜,缓释型配方肥是一种较为理想的肥料,建议因地制宜地推广应用。

To provide reference for simplified fertilization of interplanting rapeseed,the field experiments was conducted to explore application effect and quantity of slow-released formula fertilizer(N∶P2O5∶K2O=25∶7∶8,and other mid-nutrient and min-nutrient 5%)on rapeseed under sowing late rice in triple-cropping areas(Jinxian of Jiangxi)in the middle reaches of the Yangtze River during 2016~2018.The results showed that both the application of formula fertilizer and conventional fertilizer on interplanting rapeseed in late rice with residues retention could significantly increase the yield and economic benefits.Compared with conventional fertilizer application,one-off base fertilization application of formula fertilizer technology could ensure stable or increase seed yield and improve farmers’income,while reduce the total amount of nutrients significantly.In summary,the slow-released formula fertilizer is a suitable fertilizer for interplanting rapeseed.Therefore,it should be suggested to promote the application according to local condition.