耕作、施氮和密度及其互作对旱地春玉米土壤水分及产量形成的影响

李敖,张元红,温鹏飞,王瑞,董朝阳,宁芳,李军

Effects of Tillage, Nitrogen Application, Planting Density and Their Interaction on Soil Moisture and Yield Formation of Spring Maize in Dryland

LI Ao,ZHANG YuanHong,WEN PengFei,WANG Rui,DONG ZhaoYang,NING Fang,LI Jun

表2 耕作、密度、施氮对春玉米田土壤蓄水量、水分利用效率、叶面积、干物质积累及产量构成因素的方差分析

Table 2 Analysis of variance of soil moisture dynamics, WUE, LAI, dry matter accumulation and yield components in spring maize field under tillage, density, and nitrogen application

指标 Indicator 耕作 Tillage (T) 密度 Density (D) 施氮 Fertilization (F) 耕作×密度 T×D 耕作×施氮 T×F 密度×施氮 D×F 耕作×密度×施氮 T×D×F 土壤蓄水量及水分利用效率 Soil water content and WUE 播种期蓄水量 Soil water storage at sowing <0.001 0.870 0.913 0.010 0.170 0.148 0.006 成熟期蓄水量 Soil water storage at maturity 0.714 <0.001 <0.001 <0.001 <0.001 0.005 <0.001 水分利用效率 Water use efficiency <0.001 <0.001 <0.001 0.012 0.014 <0.001 0.005 叶面积指数 Leaf area index 拔节期叶面积指数 LAI at jointing stage 0.002 0.001 0.005 0.007 0.007 0.048 0.294 抽雄期叶面积指数 LAI at tasseling stage 0.045 <0.001 <0.001 0.010 0.748 0.380 0.660 灌浆中期叶面积指数 LAI at mid-filling stage 0.612 0.005 0.003 0.317 0.838 0.003 0.996 干物质积累 Dry matter accumulation 抽雄期干物质积累 Biomass at tasseling stage 0.012 <0.001 <0.001 0.152 0.020 <0.001 0.287 成熟期干物质积累 Total biomass at maturity stage <0.001 <0.001 <0.001 0.002 <0.001 0.060 0.007 产量及构成因素 Yield and components 穗数Ear number <0.001 <0.001 <0.001 0.034 0.704 0.002 0.015 穗粒数Grains per ear <0.001 <0.001 <0.001 0.034 0.002 0.704 0.415 百粒重100-kernel weight 0.16 0.001 <0.001 0.512 0.017 0.764 0.028 产量Yield 0.001 <0.001 <0.001 0.016 0.011 0.018 0.028 收获指数HI <0.001 <0.001 <0.001 0.034 0.002 0.704 0.415