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超级杂交晚稻缓释氮肥最佳用量研究
Study on the rate of slow- release nitrogen fertilizer for super hybrid late rice
【摘要】 采用集成栽培模式和农民习惯栽培模式,在5个施氮量的处理下,研究了缓释氮肥不同用量对超级杂交晚稻生长发育和产量的影响,并建立了产量与纯氮施用量的数学模型。结果表明:超级杂交晚稻的最佳施纯氮量和较经济的施纯氮量均为180 kg/hm2,此时2种栽培模式的产量均最高,分别为8.76和7.59 t/hm2。
【Abstract】 The effects of 5 different slow-release nitrogen fertilizer rates on the growth and grain yield of late rice are studied under 2 cultivation modes both of the conventional and the compositive cultivation,and the relationship of N rate and grain yield is deduced.The results show that the optimal N rate of 180 kg / hm2 is more economical,with the yield of compositive cultivation mode of 8.76 t / hm2 and yield of conventional cultivation mode of 7.95 t / hm2.
【关键词】 超级杂交晚稻;
缓释氮肥;
最佳施氮量;
【Key words】 super hybrid late rice; slow release nitrogen fertilizer; optimal N rate;
【Key words】 super hybrid late rice; slow release nitrogen fertilizer; optimal N rate;
【基金】 湖南省“十一五”农业重大专项(2006NK1001)
- 【文献出处】 磷肥与复肥 ,Phosphate & Compound Fertilizer , 编辑部邮箱 ,2009年01期
- 【分类号】S511.33
- 【被引频次】4
- 【下载频次】66