大豆种植密度对玉米/大豆间作系统产量形成的竞争效应分析

任媛媛, 张莉, 郁耀闯, 张彦军, 张岁岐

Competitive effect of soybean density on yield formation in maize/soybean intercropping systems

REN Yuan-Yuan, ZHANG Li, YU Yao-Chuang, ZHANG Yan-Jun, ZHANG Sui-Qi

表2 不同间作方式对大豆产量构成的影响

Table 2 Effects of different planting pattern on yield and yield components in soybean

种植比例 Row proportion 密度 Density 单株粒重 Grain weight per plant (g) 单株荚数 Pods per plant 单株总粒数 Grain number per plant 单株有效粒数 Effective grain number per plant 结荚长度 Length of podding (cm) 主茎节间长度 Internode length (cm) 主茎节数 Nodes on main stem (No.) 百粒重 Hundred grain weight (g) 单作 Single crop S1 23.5 aA 53.3 aA 105 aA 101 aA 51.0 aB 58.4 bB 16.7 aA 23.7 aA S2 15.9 bA 36.1 bA 70.0 bA 68.4 bA 54.5 aA 66.9 aA 16.7 aA 24.1 aA S3 10.8 cA 25.3 cA 47.2 cA 46.1 cA 53.8 aA 66.8 aA 15.3 bA 24.1 aA MS1 20.2 aA 43.0 aB 85.1 aB 82.2 aB 55.5 aA 63.9 bA 15.2 aB 23.9 aA 2:2 MS2 12.3 bC 28.1 bB 56.2 bB 54.0 bB 54.7 aA 68.9 aA 15.1 aB 24.1 aA MS3 11.5 bA 25.0 bA 49.8 bA 47.9 bA 54.7 aA 72.1 aA 14.4 bB 24.3 aA MS1 21.6 aA 48.4 aAB 94.2 aAB 89.4 aAB 51.9 aB 61.7 bAB 15.8 aB 24.0 aA 2:4 MS2 14.0 bB 31.0 bB 60.1 bB 58.5 bB 52.4 aA 66.4 aA 15.5 aB 24.2 aA MS3 11.2 cA 24.9 cA 48.3 cA 46.3 cA 51.4 aA 68.4 aA 14.6 bB 24.4 aA