机械插秧密度和氮肥运筹对两优1528群体动态和产量的影响  

Effects of Planting Density and Nitrogen Fertilizer Management on Population For mation and Yield of Liangyou 1528 under Mechanized Transplanting Conditions

作　　者：程建平[1] 张再君[1] 赵锋[1] 汪光友 杨如辉 李家普 王启均 

机构地区：[1]湖北省农业科学院粮食作物研究所,湖北武汉430064 [2]南漳县农业局,湖北南漳441500 [3]湖北省农业机械管理局,湖北武汉430070 [4]南漳县农业机械管理局,湖北南漳441500 [5]贵州省烟草公司遵义市公司,贵州遵义563000

出　　处：《杂交水稻》2011年第6期69-73,共5页Hybrid Rice

基　　金：国家重大科技专项资助项目(2011BAD16B02);国家农业科技成果转化资金项目(2009GB2D100235)

摘　　要：研究了机插条件下不同的栽植密度、氮肥使用量和氮肥中基、蘖、穗肥不同的用量比例对两系杂交水稻两优1528群体动态、产量构成以及生育进程。结果表明,两优1528分别在机插密度为24.0万穴/hm2、氮肥用量247.5 kg/hm2以及基、蘖、穗肥比例为5∶3∶2时产量最高。栽植密度过大,无效分蘖增多,每穗总粒数减少,密度过小则群体总量较小,有效穗不足;氮肥用量达247.5 kg/hm2时虽然产量最高,但氮肥偏生产力(PPN)较低,而氮肥用量202.5 kg/hm2可获得较高的产量和氮肥偏生产力。Under the mechanized transplanting conditions, the effects of planting density, amounts of nitrogen fertilizer application and ratios of basal, tillering and panicle nitrogen fertilizer were studied on the population structure, yield and growth stages of Liangyou 1528, a two-line hybrid rice variety. The results showed that Liangyou 1528 yielded highest when the planting density was at 240 000 hills/hm2, the rate of nitrogen fertilization at 247.5 kg/hm2and the ratio of basal, tillering and panicle nitrogen fertilizer at 5： 3： 2. When the planting density was too dense, the number of ineffective tillers increased and the number of spikelets per panicle decreased. When the planting density was too sparse, the population was small with an insufficient number of effective panicles. Although the treatment with a rate of nitrogen application at 247.5 kg/hm2 had the highest yield, it had a lower partial factor productivity from applied N （ PFPN ）. The treatment with a rate of nitrogen application at 202.5 kg/hm2 had both a relatively high yield and a relatively high PFPN.

关 键 词：两系杂交水稻 两优1528 机械插秧 栽植密度 氮肥运筹 群体动态 产量 

分 类 号：S511.48[农业科学—作物学] S114