种植密度对甘肃不同生态区小麦产量形成的影响

柴芳梅, 高甜甜, 柴守玺, 程宏波, 宋亚丽, 鲁清林

Effects of Planting Density on Wheat Yield Formation in Different Ecological Regions of Gansu Province

Fangmei Chai, Tiantian Gao, Shouxi Chai, Hongbo Cheng, Yali Song, Qinglin Lu

表2 播种量对产量及产量结构因素的影响

Table 2 Effects of plant density on yield and yield structure factors

气候类型区 Climate type region 播种量 Plant density (kg/hm2) 产量 Yield (kg/hm2) 穗数 Spike number (×104/hm2) 穗粒数 Grain number per spike 千粒重 1000-grain weight (g) 低温半干旱区 Low-temperature semi-arid region 150.0 5 054.5c 501.6c 25.4b 43.4a 187.5 5 472.0a 484.6d 27.9a 44.1a 225.0 5 379.5ab 546.4ab 23.9b 44.0a 262.5 5 226.5b 586.1a 24.3b 42.6a 300.0 5 252.0b 550.8ab 24.5b 42.7a 变异系数 Variation coefficient (%) 3.0 7.6 6.5 1.6 最大差异率 Maximum difference rate( %) 8.3 21.0 17.2 3.5 半湿润易旱区 Semi-humid arid region 150.0 5 280.0c 523.2c 29.2a 45.1b 187.5 5 490.0b 586.8ab 25.4c 46.7a 225.0 5 730.0a 606.0a 26.9b 46.9a 262.5 5 565.0ab 581.2ab 25.4c 45.0b 300.0 5 535.0ab 552.8b 28.8a 45.8a 变异系数 Variation coefficient (%) 2.9 5.7 6.6 2.0 最大差异率 Maximum difference rate (%) 8.5 15.8 15.0 4.2 半干旱区 Semi-arid region 112.5 6 821.6c 484.2c 34.4a 45.0a 150.0 7 006.5b 547.0b 31.6ab 44.2a 187.5 7 106.4b 538.9b 32.1ab 45.1a 225.0 7 271.4a 635.5a 28.3b 44.1a 262.5 7 146.4ab 610.5a 28.7b 44.6a 变异系数 Variation coefficient (%) 2.4 10.7 8.2 1.0 最大差异率 Maximum difference rate (%) 6.6 31.2 21.9 2.2