节水减氮对夏玉米干物质和氮素积累转运及产量的调控效应

王旭敏,雒文鹤,刘朋召,张琦,王瑞,李军

Regulation Effects of Water Saving and Nitrogen Reduction on Dry Matter and Nitrogen Accumulation, Transportation and Yield of Summer Maize

WANG XuMin,LUO WenHe,LIU PengZhao,ZHANG Qi,WANG Rui,LI Jun

表2 灌溉、施氮对夏玉米生理指标、干物质（氮素）转运、产量及构成因素的方差分析

Table 2 Analysis of variance of irrigation and nitrogen application on physiological indexes, dry matter (nitrogen) transport, yield and components of summer maize

指标 Indicator 灌溉 Irrigation (I) 施氮 Nitrogen (N) 灌溉×施氮 I×N 叶面积指数LAI 抽雄期VT 208.16*** 1054.94*** 12.60** 成熟期R6 401.31*** 408.48*** 6.97** 净光合速率Pn 抽雄期VT 51668.07*** 64135.53*** 4885.87** 成熟期R6 12623.77*** 61563.93*** 5228.69** 干物质积累 Dry matter accumulation 抽雄期VT 155.34*** 172.16*** 24.82** 成熟期R6 646.58 *** 318.62*** 13.42** 干物质转运 Dry matter remobilization 花前转运量DMR 35.00*** 16.57*** 10.33** 花前转运率DMRE 12.38*** 6.32** 3.84*** 花前转运贡献率DMRCG 11.87*** 9.27** 5.38*** 花后转运量DMA 79.46*** 67.64*** 5.83*** 花后转运贡献率DMAC 11.87*** 9.27*** 5.38*** 氮素转运 Nitrogen remobilization 花前转运量NR 314.82* 503.62*** 64.96*** 花前转运率NRE 76.54* 80.36*** 20.22** 花前转运贡献率NRCG 32.91** 33.74*** 25.18** 花后转运量NA 110.53*** 380.39*** 18.61*** 花后转运贡献率NAC 30.91** 33.74*** 25.18*** 产量及构成因素 Yield and components 产量Yield 237.86*** 201.22*** 2.67*** 穗数Ear number 35.73*** 8.87*** 9.93*** 穗粒数Grains per ear 170.74*** 16.55*** 5.41*** 百粒重100-kernel weight 28.21*** 38.18*** 3.08***