播期和密度对超短季抗虫棉546系单株成铃动态及产量的影响  

Effects of Sowing Date and Density on Boll Development Dynamics and Yield of 546 Cotton Line with Super-short Season and Insect Resistance

作　　者：李金才[1] 唐光雷[1] 李存东[1] 

机构地区：[1]河北农业大学棉花栽培生理研究室,河北保定071001

出　　处：《贵州农业科学》2011年第7期91-94,共4页Guizhou Agricultural Sciences

基　　金：河北省自然科学基金项目(C2007000444);教育部高等学校博士学科点专项科研基金项目(20050086003);河北省科技支撑计划项目(10220208)

摘　　要：为探索超早熟短季棉麦后直播的可行性,为麦棉两熟高产优质的种植制度提供科学的理论依据,探讨了短季抗虫棉546系不同播期和密度处理对其个体成铃动态及产量的影响。结果表明:适当早播可以通过增加单株承载的果枝台数,维持较高的棉蕾、花及幼铃数量和较长的持续期,以及较高水平的成铃数量,从而实现高产。密度处理对各项指标的影响不明显,但在晚播条件下,高密度对维持后期花及幼龄、成铃较高的水平具有一定的补偿作用。The 546 cotton line with super-short season and insect resistance was tested under the condition of different sowing date and density to study effects of different sowing date and density on its boll development per plant and yield,and to provide the theoretical basis for high yield and quality cultivation system of wheat and cotton.The results showed that proper early sowing could improve its yield by increasing fruit branches per plant and maintaining higher number and duration of buds,flowers,young bolls and effective bolls,the density had no obvious effect on agronomic characters but the higher density had the certain compensation to maintain higher number of flowers,young bolls and effective bolls during its later growth period under the late sowing condition.

关 键 词：超短季抗虫棉 546系 播期 密度 单株成铃动态 

分 类 号：S562[农业科学—作物学] S352