稻茬过晚播小麦高产密度和氮肥调控效应分析

张明伟, 丁锦峰, 朱新开, 郭文善

Analysis of High-Yielding Planting Density and Nitrogen Application in Super-Late Sowing Wheat Following Rice

Zhang Mingwei, Ding Jinfeng, Zhu Xinkai, Guo Wenshan

表2 密度和氮肥处理对过晚播小麦产量及其构成因素的影响（2016-2017）

Table 2 Effects of density and nitrogen fertilizer on yield and its components of super-late sowing wheat (2016-2017)

种植密度 Planting density (×104/hm2) 施氮量 N amount （kg/hm2） 氮肥运筹 N ratio 穗数 Spike number (×104/hm2) 穗粒数 Grain number per spike 千粒重 1000-grain weight (g) 产量 Yield (kg/hm2) 270 180 4:2:1:3 427.50f 36.88abcd 40.68abc 6225.61g 5:1:2:2 504.00abcde 37.09abcd 39.97abcdef 6396.70fg 6:0:2:2 502.50abcde 36.95abcd 39.45def 6353.93fg 225 4:2:1:3 509.50abcde 37.78abc 40.19abcdef 6372.93fg 5:1:2:2 509.00abcde 37.18abcd 40.38abcde 6482.24efg 6:0:2:2 521.00abc 37.47abcd 40.08abcdef 6486.99efg 270 4:2:1:3 499.50abcdef 37.60abc 40.93a 6577.29defg 5:1:2:2 507.30abcde 37.96ab 40.87ab 6586.79defg 6:0:2:2 503.00abcde 38.26a 40.40abcd 6601.05cdefg 330 180 4:2:1:3 448.24cdef 36.16abcd 39.31def 6491.74efg 5:1:2:2 451.62bcdef 36.52abcd 39.23def 6629.56bcdefg 6:0:2:2 440.52ef 36.48abcd 39.19ef 6928.96abcdefg 225 4:2:1:3 457.89bcdef 36.71abcd 39.42def 7176.09abcde 5:1:2:2 453.55bcdef 37.17abcd 39.33def 7342.42ab 6:0:2:2 446.80def 36.81abcd 39.03f 7398.46a 270 4:2:1:3 450.66bcdef 36.37abcd 39.69bcdef 6985.99abcdef 5:1:2:2 458.38bcdef 37.08abcd 40.12abcdef 7326.18abc 6:0:2:2 477.50abcdef 36.87abcd 39.95abcdef 7347.17ab 390 180 4:2:1:3 485.50abcdef 35.71cd 39.50cdef 6762.63abcdefg 5:1:2:2 509.50abcde 35.90bcd 39.47def 6881.44abcdefg 6:0:2:2 522.50ab 36.14abcd 39.16f 6938.47abcdefg 225 4:2:1:3 536.00a 36.11abcd 39.69bcdef 7195.10abcde 5:1:2:2 509.00abcde 36.65abcd 39.44def 7204.60abcde 6:0:2:2 509.50abcde 35.36d 40.09abcdef 7247.37abcd 270 4:2:1:3 517.50abcd 36.75abcd 39.81abcdef 7033.52abcdef 5:1:2:2 485.50abcdef 37.03abcd 39.35def 7223.61abcd 6:0:2:2 493.50abcdef 36.93abcd 39.47def 7047.77abcdef F 密度Density 55.06** 16.58** 41.658** 64.51** 施氮量N amount 5.45** 7.04** 12.669** 22.03** 氮肥运筹N ratio 3.14ns 0.90ns 3.34* 4.25* 密度×施氮量Density×N amount 0.75ns 1.06ns 3.44* 3.15* 密度×氮肥运筹Density×N ratio 0.22ns 0.45ns 2.21ns 0.95ns 施氮量×氮肥运筹N amount×N ratio 0.23ns 0.67ns 1.20ns 0.35ns 密度×施氮量×氮肥运筹Density×N amount×N ratio 0.11ns 0.41ns 1.15ns 0.26ns