不同耐低氮性玉米品种的花后碳氮积累与转运特征

吴雅薇, 蒲玮, 赵波, 魏桂, 孔凡磊, 袁继超

Characteristics of post-anthesis carbon and nitrogen accumulation and translocation in maize cultivars with different low nitrogen tolerance

WU Ya-Wei, PU Wei, ZHAO Bo, WEI Gui, KONG Fan-Lei, YUAN Ji-Chao

表3 氮肥水平对不同耐低氮性玉米品种吐丝后干物质转运的影响

Table 3 Effects of N level on dry matter translocation of maize with different low N tolerance after silking stage

年份 Year 品种 Cultivar 氮肥处理 N treatment (kg hm-2) 花前干物质 转运量 DRA (×106 kg hm-2) 花前干物质 转运率 DRR (%) 花后干物质 积累量 DAA (×106 kg hm-2) 花前干物质转运对 籽粒重的贡献率 CDRA (%) 收获指数 HI 2017 ZH311 0 0.93 a 17.12 a 5.47 e 14.54 a 0.52 ab 150 0.94 a 14.61 ab 6.69 c 12.34 ab 0.52 ab 300 0.53 cd 6.92 c 8.53 a 5.86 c 0.50 bc 450 0.46 d 5.77 c 8.37 a 5.19 c 0.49 c XY508 0 0.69 bc 17.09 a 4.39 f 13.69 a 0.52 ab 150 0.76 ab 14.19 ab 5.40 e 12.31 ab 0.51 ab 300 0.74 b 12.36 b 6.20 d 10.67 b 0.53 a 450 0.47 d 7.46 c 7.07 b 6.25 c 0.49 c 2018 ZH311 0 1.35 a 15.43 ab 6.97 c 16.23 a 0.47 ab 150 1.33 a 14.44 b 7.21 c 15.59 a 0.46 b 300 0.99 b 9.96 c 7.87 b 11.14 b 0.45 b 450 0.00 e 0.00 e 9.21 a 0.00 e 0.46 b XY508 0 0.95 b 18.32 a 5.04 e 15.23 a 0.51 ab 150 0.52 c 9.76 c 6.11 d 7.87 bc 0.46 b 300 0.31 cd 5.62 d 6.95 c 4.25 cd 0.48 ab 450 0.25 d 4.06 d 7.43 bc 3.15 de 0.53 a 2019 ZH311 0 1.03 a 22.07 b 3.59 e 22.39 a 0.49 c 150 0.41 c 7.09 d 6.36 c 6.00 b 0.49 c 300 0.00 d 0.00 e 9.23 a 0.00 c 0.46 d 450 0.00 d 0.00 e 8.00 b 0.00 c 0.46 d XY508 0 0.92 ab 28.26 a 3.66 e 21.64 a 0.56 b 150 1.03 a 22.69 b 7.38 b 16.76 a 0.58 ab 300 0.74 b 13.14 c 8.12 b 9.39 b 0.56 b 450 0.35 c 6.42 d 7.25 b 4.17 bc 0.58 a