摘要
[目的]为当地杂交水稻栽培寻求适合的技术。[方法]采用裂区设计,以施氮量(3个水平)为主区,栽插密度(3个水平)为副区,研究不同施氮量和栽插密度对杂交稻C两优9号产量及其产量构成因素的影响。[结果]施氮量、栽插密度对C两优9号的产量均有显著影响。在施氮量与栽插密度的9个处理中,以施用纯N 180 kg/hm^2、栽插30.0万穴/hm^2产量最高,且与其他处理差异达极显著水平。施氮量及栽插密度对杂交水稻产量及其构成因素有不同的影响:低施氮量随着密度增加产量逐渐升高,高施氮量随着密度增加产量逐渐降低;分蘖力随着施氮量的增加及栽插密度的减小而增强;成穗率随着施氮量的增加及栽插密度的加大而减小;单位面积穗数随着栽插密度的增加而增多;施氮量和栽插密度对穗粒数影响不大;结实率随着施氮量的增加而减小;千粒重随着施氮量的增加而减小,栽插密度对其影响不大。[结论]C两优9号是分蘖力极强的杂交水稻,合理密植,精准施肥,可以充分发挥其产量潜力。
[Objective] To seek technical support for the cultivation of local hybrid rice. [Method]With N application rate as primary area and planting density as secondary area,the effect of different nitrogen fertilizer and planting densities on yield and its factors of hybrid rice C Liangyou9 was studied using split plot design.[Result] Both nitrogen application and planting densities had significant effect on the yield of C Liangyou9. Among the 9 treatments,the one with fertilization of pure N 180 kg / hm^2 and planting density 300 000 / hm^2 had the highest yield and its difference reached extremely significant level. The N application and planting density varied in the effect on hybrid rice yield and its factors： the yield increased following the increasing planting density in the condition of low N application,conversely,the yield decreased. The tilling ability became stronger with N fertilizer added and planting densities reduced; the spike rate decreased with N fertilizer added and planting densities increased;panical per unit area increased with planting densities increased; both N fertilizer and planting densities had little or no effect on grains per spike;seed setting rate increased with N fertilizer added; 1 000-grain weight decreased with N fertilizer added,planting densities produced little influence. [Conclusions] C Liangyou 9 is a hybrid rice with strong tilling ability,proper planting densities plus accurate fertilization can bring its full yield pontecial.
出处
《安徽农业科学》
CAS
2015年第36期66-68,共3页
Journal of Anhui Agricultural Sciences
关键词
施氮量
栽插密度
产量
产量构成
Fertilizer rate
Planting densities
Yield
Yield factor
