不同降雨状况下渭北旱地春玉米临界氮稀释曲线与氮素营养诊断
刘朋召,师祖姣,宁芳,王瑞,王小利,李军

Critical nitrogen dilution curves and nitrogen nutrition diagnosis of spring maize under different precipitation patterns in Weibei dryland
Peng-Zhao LIU,Zu-Jiao SHI,Fang NING,Rui WANG,Xiao-Li WANG,Jun LI
表2 旱地玉米不同生育时期地上部生物量、植株含氮量和籽粒产量的方差分析
Table 2 Variance analysis of aboveground biomass, nitrogen uptake, and grain yield at different stages of dryland maize
因子
Factors
V6 VT R3 R6 籽粒产量
Grain yield (t hm-2)
DM Na DM Na DM Na DM Na
郑单958 ZD958 2.82 23.50 6.11 18.49 10.43 15.56 16.53 12.49 7.04
陕单8806 SD8806 2.71 23.78 5.78 18.05 10.52 15.67 16.02 11.98 6.66
2016 2.79 23.43 6.27 16.87 13.27 12.67 20.57 10.16 10.94
2017 2.53 23.56 7.72 20.11 7.72 18.45 12.67 16.81 3.46
2018 2.91 23.63 6.41 17.27 13.31 12.07 19.64 10.36 8.89
2019 2.64 23.48 6.57 20.51 7.78 18.85 12.23 16.41 4.10
N0 2.10 20.11 4.28 15.43 7.30 12.55 13.01 9.59 5.34
N1 2.57 22.13 5.13 17.04 9.35 14.05 14.75 10.73 6.47
N2 2.82 23.19 6.06 18.57 11.26 16.02 17.20 12.94 7.52
N3 2.97 25.63 6.86 20.35 12.08 17.12 18.11 14.02 7.69
N4 3.14 26.45 7.15 21.06 12.59 18.05 18.33 15.15 7.23
F-value
年份Year(Y) 6.10** 0.22NS 164*** 219*** 4938*** 831*** 5133*** 885*** 11735***
品种Variety(V) 0.59NS 0.85NS 1.11NS 0.96NS 1.31NS 0.37NS 0.72 NS 0.38 NS 143***
施氮量Nitrogen(N) 33*** 1675*** 714*** 278*** 1947*** 335*** 1110*** 414*** 654***
年份×品种Y×V 0.29NS 0.28NS 0.71NS 0.32NS 0.45NS 0.12NS 0.81NS 0.13NS 34***
年份×施氮量Y×N 1.74NS 35*** 9.31** 4.61* 35*** 14*** 58*** 11.21** 44***
品种×施氮量V×N 0.08NS 2.39NS 3.32* 1.03NS 13.72** 0.04NS 11.21** 0.11NS 8.92**
年份×品种×施氮量Y×V×N 0.05NS 1.13NS 3.71* 0.34NS 15.21** 0.01NS 8.91** 0.04NS 17.12**