移栽行距和密度对新稻36号叶面积指数及干物质积累与分配的影响

Effect of Transplanting Row-spacing and Density on LAI,Accumulation and Distribution of Dry Matter of Xindao 36

[目的]为新疆水稻品种高产栽培提供理论依据和技术支持。[方法]选用新疆自育的水稻品种新稻36号为试验材料,研究不同移栽行距与种植密度对其叶面积指数及干物质积累分配的影响。[结果]不同移栽行距和密度处理下,新稻36号全生育期LAI呈单峰曲线,干物质积累量呈上升趋势,且干物质积累量与干物质分配比率因不同移栽行距、密度处理表现出一定的差异。在适宜的行距下,光合有效辐射强,叶面积指数达最高值,干物质积累量大。[结论]在生产上,要获得新稻36号高产,必须适宜密植。

[Objective] The research aimed to provide theoretical basis and technical support for the high-yield cultivation of Xinjiang rice varieties.[Method] Selecting Xinjiang self-bred rice varieties Xindao36 as test materials,the effects of different transplanting row-spacing and planting density on their LAI and accumulation and distribution of dry matter in Xindao 36 were studied.[Result] In the treatments of different transplanting row-spacing and density,LAI of Xindao36 showed a single-peak curve in whole growth period,and the accumulation of dry matter showed an increasing trend.The accumulation amount of dry matter and distribution rate of dry matter showed some differences with different transplanting row-spacing and density.Under the proper transplanting spacing,photosynthetically active radiation was intensive; LAI and dry matter accumulation were the highest.[Conclusion] In the production,dense planting was suitable for obtaining high yield of Xindao 36.