不同种植密度对套作大豆茎叶形态及产量的影响  

Effect of the Planting Density on Stem and Leaf Morphological Characteristics and Yield of Relay-cropping Soybean

作　　者：王竹[1,2] 杨文钰[2] 

机构地区：[1]成都农业科技职业学院,成都温江611137 [2]四川农业大学农学院,四川雅安625014

出　　处：《安徽农业科学》2009年第5期1957-1960,共4页Journal of Anhui Agricultural Sciences

基　　金：农业部公益性行业(农业)科研专项项目(nyhyzx07-004-10);四川省重大科技攻关资助项目(01NG016-01)

摘　　要：[目的]进一步完善小麦－玉米－大豆套作模式的技术要点。[方法]在小麦－玉米－大豆套作模式下研究不同种植密度对不同品种大豆茎叶形态及产量的影响。[结果]大豆茎粗和茎干重随密度的增加而减小；株高随密度的变化存在品种差异，贡选1号随密度的增加而增高，乐豆1号随密度的增加而降低；比叶重在整个生育期呈升－降－升的趋势，且随着密度的增加而降低；叶面积指数在不同生育时期呈抛物线型变化，且随着密度的增加而增加。贡选1号在套作条件下产量高于乐豆1号，但耐密性较差，最适密度为16．5万株／hm^2，高密度下减产严重；乐豆1号的耐密性较强，最适密度为16．5万～21．0万株／hm^2。[结论]为小麦－玉米－大豆套作模式的生产应用提供了科学依据。[Objective] The key technical point of the relay-planting model of wheat-com-soybean growth was sounded. [Method] The effects of planting density on stem and leaf morphological characteristics and yield of relay-cropping soybean were studied. [Results] The results showed that the diameter and dry matter accumulation of stem were decreased with the increasing of planting density. The changes of plant height between two varieties were different, the plant height of Gongxuan No. 1 was increased with the increasing of planting density and the plant height of Ledou No. 1 was decreased with the increasing of planting density. The SLW was increased firstly; then decreased and finally increased during the whole growth period, and the SLW was decreased with the increasing of planting density. The variation of LAI appeared ＂a parabola curve＂, and The LAI was increased with the increasing of planting density. Under relay-cropping system, the yield of Gongxuan No. 1 was higher than that of Ledou No. 1, the best planting density of Gongxuan No. 1 was 0.165 million plants per hm^2, in high planting density, its yield was decreased seriously. The suitable planting density of Ledou No. 1 was 0.165 - 0.21 million plants per hm^2. [Conclusion] The scientific basis for the relay-planting model of wheat-corn-soybean growth was provide.

关 键 词：套作大豆 密度 茎叶形态 产量 

分 类 号：S565.1[农业科学—作物学]