滴灌玉米临界氮稀释曲线与氮素营养诊断研究

付江鹏,贺正,贾彪,刘慧芳,李振洲,刘志

Critical nitrogen dilution curve and nitrogen nutrition diagnosis of maize with drip irrigation

Jiang-Peng FU,Zheng HE,Biao JIA,Hui-Fang LIU,Zhen-Zhou LI,Zhi LIU

表2 滴灌玉米地上部干物质积累量动态变化

Table 2 Dynamic changes of dry matter accumulation in aboveground parts of drip irrigation maize

年份 Year 生育时期 Growing period 地上部生物量Aboveground biomass (t hm-2) N0 N90 N180 N270 N360 N450 2017 V10 1.24±0.24 c 1.31±0.18 bc 1.52±0.76 bc 1.75±0.56 abc 2.19±0.11 ab 2.53±0.57 a V13 3.05±0.80 d 3.56±0.39 cd 3.64±0.32 cd 3.96±0.09 bc 4.59±0.17 ab 4.77±0.21 a R1 4.43±0.89 c 4.9±0.30 bc 5.04±0.43 bc 6.21±1.11 ab 7.34±1.19 a 7.66±0.88 a R3 6.43±0.47 c 6.58±0.36 c 7.40±0.67 c 8.95±0.64 b 10.44±0.50 a 11.02±0.84 a R5 8.99±0.61 c 9.75±0.12 c 11.80±0.12 b 12.08±0.93 b 13.40±0.43 a 13.12±0.55 a R6 10.88±0.74 d 12.93±0.32 c 14.04±0.76 b 15.11±0.09 a 15.42±0.86 a 15.14±0.14 a 2018 V10 1.35±0.21 b 1.50±0.29 b 1.51±0.06 b 1.57±0.17 b 1.73±0.93 a 1.74±0.32 a V13 1.89±0.29 c 2.48±0.44 b 2.53±0.10 b 2.86±0.19 b 3.26±0.06 a 3.48±0.08 a R1 4.95±0.40 d 5.79±0.65 cd 6.25±0.61 bc 6.62±0.48 ab 7.78±0.92 ab 8.76±0.89 a R3 6.27±0.61 d 7.16±0.59 c 8.80±0.17 b 8.92±0.12 b 10.91±0.46 a 10.79±0.42 a R5 8.92±0.91 c 9.91±0.51 bc 10.44±1.11 bc 11.21±0.89 b 13.26±1.08 a 12.91±0.76 a R6 10.03±0.52 e 11.06±0.29 d 12.55±0.73 c 13.47±0.13 b 16.08±0.47 a 14.82±0.45 a