减氮增硅与移栽密度对水稻生育及产量的影响  

Effects of Reducing Nitrogen and Increasing Silicon and Transplanting Density on Rice Growth and Yield

作　　者：付雪蛟 吕小红[1] 杜萌 黄河[1] 史鸿儒 付立东[1] 隋鑫[1] FU Xuejiao;LYU Xiaohong;DU Meng;HUANG He;SHI Hongru;FU Lidong;SUI Xin(Liaoning Institute of Saline-Alkaline Land Utilization,Panjin 124010;Liaoning Agricultural Development Ser-vice Center,Shenyang 110034,China)

机构地区：[1]辽宁省盐碱地利用研究所,辽宁盘锦124010 [2]辽宁省农业发展服务中心,沈阳110034

出　　处：《东北农业科学》2021年第1期6-9,共4页Journal of Northeast Agricultural Sciences

基　　金：国家重点研发计划项目(2018YFD0300300);辽宁省科学事业公益研究基金项目(20170034)。

摘　　要：以盐丰47为材料,采用小区对比方法,探讨了减氮增硅与移栽密度对水稻生育及产量的影响。结果表明,适当减氮增硅增加移栽密度可有效提高单位面积收获穗数、成穗率、千粒重及结实率,可促进齐穗后干物质积累量的增加,并可增强植株抗病性、降低水稻后期的倒伏风险。试验结果以氮肥施入量较常规用量减少10%的N2-18处理产量较高,为11.74 t/hm^(2),比N1-18、N1-21、N2-16、N3-16、N3-18处理分别增产2.18%、1.47%、6.24%、8.20%和9.01%。如继续减少氮肥施入量,则产量降低。Taking Yanfeng 47 as the material,the effects of reducing nitrogen and increasing silicon and transplanting density on rice growth and yield were studied by plot comparison method.The results showed that increasing transplanting density by appropriately reducing nitrogen and increasing silicon could effectively improve the number of harvested panicles per unit area,the rate of panicle,1000 grain weight and seed setting rate,promote the increase of dry matter accumulation after full panicle,enhance plant disease resistance and reduce the risk of lodging at later stage of rice.The results showed that the yield of N2-18 was 11.74 t/ha,which was higher than that of N1-18,N1-21,N2-16,N3-16 and N3-18 by 2.18%,1.47%,6.24%,8.20%and 9.01%,respectively.If the amount of nitrogen fertilizer is reduced,the yield will decrease.

关 键 词：机插水稻 氮肥施入量 移栽密度 硅肥 产量 

分 类 号：S511[农业科学—作物学]