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1 不同间作方式对玉米产量构成的影响

Table 1 Effects of different planting pattern on yield and yield components in maize

种植比例 Row proportion 密度 Density 穗重 Ear weight (g) 穗长 Ear length (cm) 秃尖长 Barren tip length (cm) 穗粗 Ear diameter (cm) 行数 Ear row number (No.) 行粒数 Row kernel number (No.) 穗粒重 Grain weight per ear (g) 轴粗 Cob diameter (cm) 轴重 Cob weight (g) 千粒重 Thousand- grain weight (g) 单作 Single crop M 215 b 15.6 c 0.40 a 4.68 b 15.3 b 36.8 c 161 c 2.82 c 149 c 306 b MS1 252 a 16.7 ab 0.49 a 4.87 a 15.5 ab 37.4 bc 184 b 2.92 ab 183 b 328 a 2:2 MS2 252 a 16.5 b 0.41 a 4.85 a 15.6 ab 38.0 ab 186 ab 2.90 b 191 ab 329 a MS3 256 a 16.8 ab 0.41 a 4.84 a 15.4 ab 37.7 abc 186 ab 2.94 ab 202 a 329 a MS1 267 a 17.2 a 0.49 a 4.93 a 15.9 a 39.3 a 197 a 2.93 ab 200 a 336 a 2:4 MS2 256 a 16.9 ab 0.48 a 4.96 a 15.7 ab 37.9 abc 187 ab 2.97 a 192 ab 332 a MS3 256 a 16.6 b 0.43 a 4.82 a 15.8 ab 37.5 bc 189 ab 2.88 bc 199 ab 333 a