超级杂交中稻Y两优1号最佳缓释氮肥用量与密度配置研究  

Studies on the Optimized Allocation of Controlled-release Nitrogen Fertilizer Application and Planting Density for Medium Super Hybrid Rice Combination Y Liangyou 1

作　　者：马国辉[1] 龙继锐[1,2,3] 戴清明[4] 周静[1,2] 

机构地区：[1]湖南杂交水稻研究中心,湖南长沙410125 [2]湖南农业大学农学院,湖南长沙410128 [3]澧县农业局,湖南澧县415500 [4]汉寿县农业局,湖南汉寿415505

出　　处：《杂交水稻》2008年第6期73-77,共5页Hybrid Rice

基　　金：国家科技支撑计划(2006BAD02A13);湖南省“十一五”农业重大专项(2006NK1001)

摘　　要：采用二因素裂区设计,研究了缓释氮肥用量、移栽密度对超级杂交中稻新组合Y两优1号生长发育和产量的影响,并建立了产量与施氮量和密度的数学模型。结果表明:施氮量、移栽密度以及两者交互作用均显著地影响水稻产量;氮肥用量和密度分别为189.5 kg/hm2(折纯N)和20.8万穴/hm2时产量最高(10.608 t/hm2),最佳经济施氮量和最佳密度分别为189.0 kg/hm2和20.7万穴/hm2,此时最佳经济产量为10.069 t/hm2。The field experiment was conducted by split-plot design of two factors to study the effects of applying amount of controlled-release nitrogen fertilizer （SCU） and transplanting density on the growth and development and yield of the medium super hybrid rice combination Y Liangyou 1, and the mathematical model of yield to nitrogen rates and transplanting densities was set up. The results indicated that the yield was significantly affected by the nitrogen rate, transplanting density and their interaction. The highest rice yield （ 10. 608 t/hm2 ） was obtained with the combination of N 189.5 kg/hm2 （purified） and Density 2.08 × 10^5 hills/hm2. The most economical amount of N application and optimized transplanting density were 189.0 kg/hm2 （purified） and 2.07 × 10^5 hills/hm2, respectively, and the most economical yield was 10.069 t/hm2.

关 键 词：超级杂交稻 Y两优1号 缓释氮肥 移栽密度 产量 

分 类 号：S511.06[农业科学—作物学] S143.1