氮肥和密度对高粱产量及氮肥利用率的影响

张瑞栋,曹雄,岳忠孝,梁晓红,刘静,黄敏佳

Effects of Nitrogen and Density Interaction on Grain Yield and Nitrogen Use Efficiency of Sorghum

Ruidong Zhang,Xiong Cao,Zhongxiao Yue,Xiaohong Liang,Jing Liu,Minjia Huang

表2 不同密度和氮水平下高粱农艺性状及产量的多重比较

Table 2 The multiple comparison of yield and agronomic characters under different density and nitrogen levels

处理 Treatment 单位面积穗数 Panicles per hm2 穗粒数 Seeds per panicle 千粒重(g) 1000-seed weight SPAD LAI 单株生物量(g) Weight per plant HI 产量(kg/hm2) Yield 密度水平Level of density D1 66 072.12c 3 168.24a 31.39a 51.20a 4.79c 299.12a 0.35a 6 768.65c D2 84 691.82b 3 042.87b 31.15b 50.53ab 5.54b 293.61a 0.34b 8 282.46a D3 96 281.65a 2 672.10c 30.26c 49.40b 6.39a 262.13b 0.32c 7 985.94b CV(%) 18.51 8.71 1.92 1.81 14.36 7.00 4.54 10.45 氮水平Level of nitrogen N1 76 776.84e 2 724.92e 30.19c 47.00d 5.35e 272.28c 0.31c 6 449.11d N2 80 662.40d 2 877.54d 30.74b 49.56c 5.46d 277.12c 0.33b 7 194.56c N3 84 140.04c 3 029.28c 31.19a 51.22b 5.59c 287.74b 0.34a 8 094.06b N4 84 812.78b 3 097.80a 31.30a 51.44b 5.70b 293.59a 0.35a 8 345.64a N5 85 350.59a 3 075.83b 31.24a 52.67a 5.77a 294.06a 0.34a 8 311.71a CV(%) 4.39 5.32 1.52 4.35 3.08 3.45 4.54 10.83