间作大豆的竞争性分析

通过多因素和单因素试验资料的相关和回归分析,证明玉米和大豆对光照和肥料的竞争明显,但水分与间作大豆产量无显著相关。玉米通过株型、叶面积等影响大豆冠层光照度,光照度与大豆产量呈正相关。N肥降低间作大豆产量,NPK复合肥增加大豆产量。本文还提出了提高间作大豆产量的栽培主攻方向。

THE. ANALYSES OF COMPETITION CHARACTERISTICS OF INTERCROPPING SOYBEAN

With linear regression and multiple regression methods. Some important quantity characters in maize(Zea Mays. L. ) soybean(Glycule nuit (L) merr ) intercropping were studied. The resuits indicated that maize could reduce soybean growth and yield by competition for light and nu trients, and the competition for light was the main factor causing yield difference in soybean in tercropping with maize. Competition for water did not occur in the experiment, becase the amount of precipitation could meet the need of both maize and soybean.Theoretical analysed had suggested a soybean maize intercropping plants rato. Maximua LAI. and plant height of maize might strongly influence soybean Comptition ability. The light intensity at soybean canopy closely related to the yield of intercropped soybean. Soybean yield in-cresed as soybean population plants and NPK compound fertilizer increased but N could reduce soybean yield and increase maize yield.The result of multi regression of yield components of intercropping soybean under different population construtions were analysed. The No. pods per plant. No. seed per planc and 100-Seed weight were the biggest component of yield. Using the BASIC procedure, the multi regression models of high yield of intercropping soybean had been build.Beased on the results of the experiment the main directions of cultivation in maize--soybean cropping (mixing)systems of the different population structural were indicated.