黄土塬区玉米大豆带状复合种植产量与收益分析

Analysis of Yield and Benefits of Maize-soybean Strip Compound Panting System in the Loess Plateau Area

为了确定黄土塬区玉米大豆优势带型配置体系,采用单因素随机区组设计,研究了不同间作带型比对籽粒产量及经济效益的影响。结果表明:不同带型配置间作体系下土地当量比(LER)和相对拥挤系数(K)均高于单作处理。IC1模式群体籽粒产量为7979.0 kg·hm^(-2),显著高于IC2和IC3模式(P<0.05),侵占力(A)和竞争指数(CR)显示玉米相对大豆为竞争优势物种,且系统生产指数(SPI)和货币优势指数(MAI)表明带型配置为2∶2间作模式下最大,相比IC2处理分别增加了3.31%,41.95%,较IC3处理分别增加了3.33%,10.97%。综合分析,带型配置为2∶2间作体系下群体籽粒产量和经济效益均为最高,适宜旱农区机械化和集约化现代农业的发展和推广。

The purpose of this study is to select appropriate intercropping model for corn and soybean planting system in the Loess Plateau.A field experiment was single factor randomized block designed,and was used to study the effects of different intercropping patterns on grain yield and economic benefits.The results showed that the land equivalent ratio(LER)and the relative crowding coefficient(K)were higher than those in the intercropping systems.The seed yield of IC1 model was 7979.0 kg·hm^(-2),which was significantly higher than that of IC2 and IC3(P<0.05).The occupation force(A)and competition index(CR)showed that maize was the dominant species of soybean.The system production index(SPI)and monetary advantage index(MAI)showed that 2∶2 intercropping mode would maximum the system benefits,increased by 3.31%and 41.95%compared with IC2,increased by 3.33%and 10.97%compared with IC3,respectively.Therefore,the 2∶2 intercropping model had the highest grain yield and economic rewards,and it could be adopted and popularized by mechanization and modern agriculture of drought farming.