栽培密度对直立穗型籼稻NF11产量性状及生长的影响  

Effects of planting density on yield traits and growth of indica rice NF11, aerect panicle type

作　　者：李海青 王祺 袁池 缪鑫 刘静 LI Hai-qing;WANG Qi;YUAN Chi;MIAO Xin;LIU Jing(Neijiang Poverty Alleviation Work and Immigration Bureau,Neijiang 641000,China;Neijiang Academy of Agricultural Sciences,Neijiang 641000,China;Neijiang Seed Station,Neijiang 641000,China)

机构地区：[1]内江市扶贫和移民工作局,四川内江641000 [2]内江市农业科学院,四川内江641000 [3]内江市种子管理站,四川内江641000

出　　处：《广东农业科学》2018年第8期9-15,共7页Guangdong Agricultural Sciences

基　　金：四川省"十三五"水稻育种攻关项目(2016NYZ0028);四川省科技支撑计划项目(2015FZ0012)

摘　　要：为探究直立穗型籼稻产量、产量性状及生长在不同栽培密度条件下的表现差异,为生产上直立穗型籼稻材料以最高效率利用环境等资源提供理论依据,以弯曲穗籼稻N11为对照,直立穗籼稻NF11为试验材料,选择5个不同栽培密度(0.23 m×0.12 m、0.27 m×0.14 m、0.33 m×0.17 m、0.38 m×0.20 m、0.40 m×0.21 m)开展试验。结果表明:栽培密度对直立穗型籼稻产量及产量性状均有较大影响;在不同栽培密度条件下,不同穗型籼稻各产量性状对产量的贡献不尽相同,其中每穗粒数对弯曲穗型籼稻产量影响较大,千粒重对直立穗型籼稻产量影响较大;两个穗型材料在0.27 m×0.14 m密度下产量最高,随着密度的减小,弯曲穗型籼稻减产量大于直立穗;随栽培密度的变化,各农艺性状指标及纹枯病发病情况对弯曲穗型籼稻产量没有显著影响,而株高及纹枯病发病情况对直立穗型籼稻有显著影响。由此可见,虽然随着栽培密度的减小,两种穗型籼稻产量表现出的趋势相似,但各产量性状及生长相关指标的表现存在差异。试验表明直立穗籼稻材料能够通过调节自身株型来影响产量,使得其产量对密度变化的敏感度较弯曲穗籼稻材料更弱,故而选择栽培密度可结合实际应用生产环境进行考虑。In order to investigate the differences of yield and yield traits of indica rice in erect panicle type under different planting densities,and provide a theoretical basis for the production of indica rice in erect panicle type with the highest efficiency in the use of the environment and other resources,five cultivars with different planting densities(0.23 m×0.12 m,0.27 m×0.14 m,0.33 m×0.17 m,0.38 m×0.20 m,0.40 m×0.21 m)were selected with erect panicle indica rice(NF11),and curved panicle rice(N11)was taken as a control.The results indicated that different densities had effects on the yield and yield traits of indica rice in erect panicle type.The yield traits of different panicle type indica rice have different contribution to yield under different cultivation densities.The total grain number had a great influence on the yield of the curved panicle type indica rice,and the 1000-grain weight had a greater effect on the yield of erect panicle type indica rice.What’s more,the two materials produced the highest yield at the density of 0.27 m×0.14 m,and the yield of the curved panicle type indica rice was greater than that of the erect panicle as the density decreasing.With the change of planting densities,the agronomic traits and the incidence of sheath blight had no significant effect on the yield of curved panicle type indica rice,but plant height and sheath blight had significant effects on erect panicle type indica rice.It can be seen that,although the yield had similar trends of the two panicle type indica rice as the planting density decreasing,the performance of yield traits and growth related indicators differs.It was concluded that the erect panicle rice can influence yield by regulating its own plant type,and the sensitivity of the erect panicle rice to the change of density was weaker than that of the curved panicle indica rice.The selection of cultivation density should be considered in combination with the practical application of production environment.

关 键 词：籼稻 直立穗 栽培密度 产量性状 农艺性状 纹枯病 

分 类 号：S511.044[农业科学—作物学]