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
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刘朋召,师祖姣,宁芳,王瑞,王小利,李军
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Critical nitrogen dilution curves and nitrogen nutrition diagnosis of spring maize under different precipitation patterns in Weibei dryland
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Peng-Zhao LIU,Zu-Jiao SHI,Fang NING,Rui WANG,Xiao-Li WANG,Jun LI
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表1 不同施氮处理下旱地春玉米不同生育时期地上部生物量和籽粒产量
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Table 1 Aboveground biomass at the different growth stages and grain yield of dryland spring maize at the different N rates
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年份
Year | 品种
Varieties | 施氮量
N rates | 地上部生物量 Aboveground biomass (t hm-2) | 籽粒产量
Grain yield (t hm-2) | | V6 | VT | R3 | R6 | | 2016 | 郑单958 | N0 | 2.17 d | 4.78 e | 9.67 d | 18.22 d | 9.98 c | | ZD958 | N75 | 3.13 c | 5.68 d | 11.39 c | 20.13 c | 10.89 b | | | N150 | 3.39 b | 6.18 c | 13.36 b | 21.4 b | 11.87 a | | | N270 | 3.46 a | 7.02 b | 14.91 a | 21.93 a | 12.22 a | | | N360 | 3.31 b | 7.85 a | 15.25 a | 22.22 a | 11.89 a | | 陕单8806 | N0 | 2.07 c | 4.94 e | 10.47 e | 18.17 d | 9.77 b | | SD8806 | N75 | 2.41 b | 5.46 d | 12.39 d | 19.42 c | 10.14 b | | | N150 | 2.46 b | 6.11 c | 13.36 c | 20.58 b | 10.68 a | | | N270 | 2.67 a | 7.11 b | 14.61 b | 20.97 b | 10.97 a | | | N360 | 2.86 a | 7.55 a | 17.25 a | 22.64 a | 10.99 a | | 2017 | 郑单958 | N0 | 2.10 d | 3.78 d | 4.97 d | 10.22 d | 2.22 e | | ZD958 | N75 | 2.13 d | 4.68 c | 6.98 c | 12.13 c | 2.78 d | | | N150 | 2.39 c | 5.20 b | 8.96 b | 13.40 b | 4.47 a | | | N270 | 2.86 b | 6.35 a | 9.03 b | 14.93 a | 4.12 b | | | N360 | 3.31 a | 6.78 a | 9.24 a | 15.22 a | 3.43 c | | 陕单8806 | N0 | 2.23 c | 3.78 d | 4.87 d | 9.17 e | 2.31 e | | SD8806 | N75 | 2.31 c | 4.68 c | 5.98 c | 10.42 d | 3.02 d | | | N150 | 2.49 b | 5.13 b | 8.98 b | 12.59 c | 4.17 b | | | N270 | 2.43 b | 6.35 a | 9.01 b | 13.97 b | 4.29 a | | | N360 | 3.08 a | 6.71 a | 9.14 a | 14.64 a | 3.80 c | | 2018 | 郑单958 | N0 | 2.23 d | 5.11 d | 9.97 e | 13.45 d | 6.72 d | | ZD958 | N90 | 2.81 c | 6.16 c | 12.39 d | 17.42 c | 9.68 bc | | | N180 | 3.09 c | 6.90 b | 13.36 c | 22.29 b | 9.82 ab | | | N270 | 3.33 b | 7.22 a | 14.61 b | 23.03 a | 10.12 a | | | N360 | 3.48 a | 7.65 a | 15.25 a | 23.14 a | 9.42 c | | 陕单8806 | N0 | 1.91 c | 4.62 d | 8.93 d | 15.06 d | 5.67 d | | SD8806 | N90 | 2.69 b | 5.11 c | 12.72 d | 18.02 c | 7.64 c | | | N180 | 3.11 a | 6.86 b | 13.51 c | 20.80 b | 9.75 b | | | N270 | 3.22 a | 7.10 a | 15.99 b | 21.90 a | 10.26 a | | | N360 | 3.24 a | 7.22 a | 16.29 a | 21.3 a | 9.83 ab | | 2019 | 郑单958 | N0 | 2.08 d | 3.78 e | 4.57 d | 9.87 d | 3.21 d | | ZD958 | N90 | 2.41 c | 4.68 d | 5.98 c | 10.02 c | 3.85 c | | | N180 | 2.85 b | 5.83 c | 9.76 a | 13.98 a | 5.05 a | | | N270 | 2.86 b | 7.35 a | 9.62 a | 13.97 a | 4.61 b | | | N360 | 2.96 a | 6.80 b | 9.24 b | 13.64 b | 4.44 b | | 陕单8806 | N0 | 2.01 c | 3.48 d | 4.97 d | 9.87 e | 2.85 d | | SD8806 | N90 | 2.69 b | 4.58 c | 6.98 c | 10.42 d | 3.75 c | | | N180 | 2.81 a | 6.23 b | 8.76 b | 12.58 c | 4.32 b | | | N270 | 2.91 a | 6.35 b | 8.83 b | 14.07 a | 4.91 a | | | N360 | 2.84 a | 6.61 a | 9.03 a | 13.84 b | 4.03 bc |
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