种植密度和施氮量对小麦-玉米轮作体系下周年产量及氮肥利用率的影响

刘佳敏, 汪洋, 褚旭, 齐欣, 王慢慢, 赵亚南, 叶优良, 黄玉芳

Effects of Planting Density and Nitrogen Application Rate on Annual Yield and Nitrogen Use Efficiency of Wheat-Maize Rotation System

Liu Jiamin, Wang Yang, Chu Xu, Qi Xin, Wang Manman, Zhao Ya'nan, Ye Youliang, Huang Yufang

表1 种植密度对不同施氮量下不同品种小麦和玉米产量构成因子的影响

Table 1 Effects of planting density and nitrogen application rate on yield components of different wheat and maize varieties

品种 Variety 种植密度 Planting density 氮水平 Nitrogen level 穗数 Spike number (×104/hm2) 穗粒数 Kernels per ear 千粒重 1000-grain weight (g) 小麦Wheat 矮抗58 187.5kg/hm2 N0 29.28c 35.78a 47.41a Aikang 58 N180 42.78a 39.63a 43.74b N360 37.78b 36.13a 42.03bc 112.5kg/hm2 N0 21.56d 38.43a 47.69a N180 34.72b 37.10a 42.90bc N360 37.06b 40.40a 41.87c 百农207 187.5kg/hm2 N0 28.78c 39.50b 49.35ab Bainong 207 N180 32.28b 34.13c 48.50ab N360 31.89b 40.60ab 46.80ab 112.5kg/hm2 N0 24.61d 39.60b 51.23a N180 35.22a 38.90b 46.80ab N360 30.94bc 44.57a 45.65b 玉米Maize 北青340 52 500株/hm2 N0 0.35 554.27a 307.20b Beiqing 340 N180 0.35 592.60a 344.57a N360 0.35 598.73a 326.83ab 75 000株/hm2 N0 0.50 550.07a 311.77b N180 0.50 564.53a 312.23b N360 0.50 539.80a 302.07b 登海605 52 500株/hm2 N0 0.35 580.73a 301.27ab Denghai 605 N180 0.35 601.07a 299.60ab N360 0.35 600.33a 267.27c 75 000株/hm2 N0 0.50 494.33b 291.00abc N180 0.50 521.60b 306.13a N360 0.50 496.73b 273.07bc