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1 密度与氮肥互作对高粱农艺性状及产量的影响差异分析

Table 1 The variance analysis of yield and agronomic traits by N fertilization and plant density

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 D1 N1 65 089.54e 2 797.26g 30.89ef 54.33a 4.55k 274.84cd 0.36a 5 806.94k N2 65 447.48e 3 110.83e 31.14de 52.33b 4.64j 292.59b 0.36a 6 433.72j N3 66 518.00e 3 261.49bc 31.61ab 51.67bc 4.82i 306.25a 0.35ab 7 081.06i N4 66 622.95e 3 323.61ab 31.61ab 51.67bc 4.92h 309.53a 0.35abc 7 217.40gh N5 66 682.61e 3 348.03a 31.67a 51.67bc 5.00h 312.41a 0.35abc 7 304.12fg D2 N1 82 426.64d 2 753.65gh 30.39h 51.33bc 5.26g 271.05cde 0.34bcd 7 102.54hi N2 83 352.63d 2 891.77f 31.05e 51.33bc 5.39f 280.60c 0.34cd 7 780.91e N3 84 787.83cd 3 171.53de 31.39bcd 51.00bc 5.50e 303.25a 0.33de 8 713.25c N4 86 022.16c 3 220.28cd 31.58abc 50.67bc 5.71d 307.28a 0.33de 8 953.46a N5 86 869.81c 3 177.12de 31.33cd 50.00cd 5.85c 305.86a 0.33de 8 862.16ab D3 N1 82 814.32d 2 623.85i 29.29j 50.00cd 6.25b 270.93de 0.33ef 6 437.84j N2 93 187.07b 2 630.02i 30.04i 48.67de 6.34b 258.18fg 0.33ef 7 369.07f N3 101 114.29a 2 654.81i 30.58gh 48.67de 6.44a 253.70g 0.32f 8 487.88d N4 101 793.23a 2 749.50gh 30.70fg 47.00ef 6.47a 263.95ef 0.32f 8 866.05ab N5 102 499.33a 2 702.34hi 30.70fg 45.33f 6.46a 263.90ef 0.30g 8 768.85bc CV(%) 16.62 9.27 2.17 4.43 12.56 7.40 4.88 13.52 显著性检验（P值）Significance test（P value） D 0.0001 0.0001 0.0001 0.0401 0.0001 0.0002 0.0027 0.0001 N 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 D×N 0.0001 0.0001 0.0334 0.2348 0.0001 0.0001 0.7808 0.0001