不同密肥条件对超级稻珞优8号的影响  

Influence of different planting density and N application rates on growth and yield components of super rice variety Luoyou 8

作　　者：叶万余 陈勤平 何永祥 董丽兰 余永国 韦汉文 黎耀军 

机构地区：[1]贺州市农业科学研究所,广西贺州542813

出　　处：《南方农业学报》2011年第2期173-176,共4页Journal of Southern Agriculture

基　　金：国家现代农业产业技术体系广西创新团队(水稻)项目专项基金资助

摘　　要：【目的】研究不同密肥生态条件下超级稻珞优8号的生长及高产群体的结构特征,为超级稻的栽培调控和群体控制提供理论依据。【方法】2010年早季,以超级稻珞优8号为材料,进行4个抛栽密度48万株/h(aA)1、60万株/h(aA)2、72万株/ha(A3)、84万株/ha(A)4和2个施氮水平150kg/ha(B)1、225kg/ha(B)2试验,生长期内调查超级稻茎蘖动态,并进行干物质测定及成熟期穗粒结构调查等。【结果】超级稻珞优8号在不同施肥量及不同种植密度条件下,表现出一定的产量差异,以抛栽密度48万株/ha(A)1、施氮水平150kg/ha(B)1组合的综合效益最佳。【结论】生产中,通过适宜抛栽密度、合理施用氮肥和采用"好气灌溉"调节水分是超级稻获得高产的重要调控途径。[Objective]The influence of different planting densities and nitrogen fertilizer application on growth and yield characteristics of super rice variety Luoyou 8 has been studied in order to provide a high-yield cultivation technique. [Method] The treatments have been designed with the combinations of four planting densities @ 4.8×10^5 （A 1）, 6.0×10^5 （A2）, 7.2×10^5 （A3） and 8.4×10^5 plants/ha （A4）, and two nitrogen application levels @ 150 （B1） and 225 kg/ha （B2） to investigate the tillering characters at growing stage, and dry matter production and partitioning and panicle characters and yield components at maturity stage during early season of 2010. [Result]Significant differences have been observed in yield components in plants treated with different nitrogen fertilizer rates and planting densities. The combination of 4.8×10^5 plants/ha and 150 kg/ha nitrogen showed the best results. [Conclusion]The high yields of super rice variety can be achieved by practicing its cultivation with suitable planting density and reasonable nitrogen applications.

关 键 词：超级稻 抛栽密度 氮肥水平 生育特性 群体结构 

分 类 号：S511.062[农业科学—作物学]