节水减氮对土壤硝态氮分布和冬小麦水氮利用效率的影响

雒文鹤,师祖姣,王旭敏,李军,王瑞

Effects of water saving and nitrogen reduction on soil nitrate nitrogen distribution, water and nitrogen use efficiencies of winter wheat

Wen-He LUO,Zu-Jiao SHI,Xu-Min WANG,Jun LI,Rui WANG

表4 不同水氮处理对小麦水氮利用效率的影响

Table 4 Effect of different treatments on water and nitrogen use efficiencies of wheat

处理 Treatment 2017?2018 2018?2019 氮肥农学 效率 NAE (kg kg-1) 氮素利用效率 NUE (kg kg-1) 水分利用效率 WUE (kg hm-2 mm-1) 氮肥农学效率 NAE (kg kg-1) 氮素利用效率 NUE (kg kg-1) 水分利用效率 WUE (g hm-2 mm-1) W0N0 — 59.20 a 18.67 cd — 15.98 f 4.91 h W0N75 2.89 ef 48.62 b 20.11 bc 7.97 fg 18.28 f 6.04 gh W0N150 0.99 f 40.43 de 22.65 a 5.36 gh 17.03 f 7.58 fg W0N225 -1.76 g 35.69 fg 18.66 cd 5.31 gh 17.59 f 9.02 f W0N300 -0.85 g 33.31 gh 20.41 bc 3.92 gh 15.90 f 8.02 f W1N0 — 46.93 b 18.11 d — 63.65 a 18.03 cd W1N75 15.45 a 45.82 bc 20.13 bc 13.65 cd 56.87 b 18.33 cd W1N150 14.29 a 44.91 bc 21.16 ab 11.44 de 49.52 c 20.01 bc W1N225 8.42 c 40.53 de 20.38 bc 10.78 e 45.09 c 22.35 a W1N300 5.66 d 36.50 efg 21.07 ab 6.93 fg 37.42 d 21.89 a W2N0 — 41.90 cd 16.85 d — 27.95 e 14.06 e W2N75 12.32 b 40.73 de 17.59 d 22.36 a 30.82 e 17.04 d W2N150 10.19 c 39.22 def 21.15 ab 17.98 b 32.98 de 19.89 bc W2N225 3.47 e 32.54 gh 18.47 cd 14.72 c 32.85 de 21.21 ab W2N300 1.67 ef 29.90 h 17.82 d 9.65 ef 28.83 e 19.88 bc F-value N 121.95*** 63.92*** 16.07*** 38.48*** 9.94*** 35.38*** W 310.08*** 33.89*** 14.42 *** 135.53*** 408.77*** 657.46*** N×W 8.83*** 8.07*** 1.90NS 4.81** 10.83*** 1.84NS