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3 不同播种量对小麦群体结构的影响

Table 3 Effects of plant density on wheat population structure

气候类型区 Climate type region 播种量 Plant density (kg/hm2) 基本苗 Basic seedling (×104/hm2) 总茎数 The total number of stem (×104/hm2) 分蘖成穗率 Tiller heading rate (%) 地上部生物量 Aboveground biomass (kg/hm2) 收获指数 Harvest index 低温半干旱区 Low-temperature semi-arid region 150.0 294e 517c 62.3a 9 319.8b 0.41a 187.5 361d 556b 40.3d 11 335.4b 0.41a 225.0 431c 578ab 46.2c 11 852.5ab 0.39b 262.5 503b 594a 53.1b 12 373.8a 0.39b 300.0 561a 603a 39.1d 12 683.7a 0.38b 变异系数 Variation coefficient (%) 24.9 6.0 20.0 11.6 3.5 最大差异率 Maximum difference rate (%) 77.5 16.5 59.4 36.1 6.3 半湿润易旱区 Semi-humid arid region 150.0 286e 603c 56.1a 13 442.0d 0.54a 187.5 366d 715b 47.4ab 16 653.0c 0.54a 225.0 436c 820a 42.2b 18 914.4b 0.56a 262.5 512b 854a 38.7b 22 323.2a 0.53a 300.0 573a 887a 31.5c 23 607.6a 0.53a 变异系数 Variation coefficient (%) 26.2 15.0 21.4 21.8 2.6 最大差异率 Maximum difference rate (%) 82.4 47.2 78.0 75.6 7.0 半干旱区 Semi-arid region 112.5 236e 498c 64.7a 12 226.6d 0.36a 150.0 315d 555bc 69.2a 15 340.5c 0.37a 187.5 385c 590ab 55.6b 17 055.5bc 0.47a 225.0 451b 624ab 50.0c 19 122.4b 0.43a 262.5 541a 649a 42.9d 22 192.3a 0.38a 变异系数 Variation coefficient (%) 29.5 10.2 19.0 21.9 11.6 最大差异率 Maximum difference rate (%) 116.5 30.2 61.5 81.5 31.1