不同降水状况下旱地玉米生长与产量对施氮量的响应

宁芳,张元红,温鹏飞,王瑞,王倩,董朝阳,贾广灿,李军

Responses of maize growth and yield to nitrogen application in dryland under different precipitation conditions

Fang NING,Yuan-Hong ZHANG,Peng-Fei WEN,Rui WANG,Qian WANG,Zhao-Yang DONG,Guang-Can JIA,Jun LI

图6 籽粒产量与播期蓄水量及不同阶段降雨量的关系 A为籽粒产量与不同阶段降雨量的关系, 其中 FP0为休闲期降水; FP1为休闲至拔节期降水; FP2为休闲至抽雄期降水; FP3为休闲至灌浆期降水。B为籽粒产量与播前土壤蓄水量与不同阶段降雨量之和的关系, 其中SP0为播前土壤蓄水量; SP1为播前土壤蓄水量+播种至拔节期降水; SP2为播前土壤蓄水量+播种至抽雄期降水; SP3为播前土壤蓄水量+播种至灌浆期降水。**表示0.01显著水平。

Fig. 6 Relationship between maize grain yield and soil water storage before sowing and precipitation in different growth periods A shows the relationship between grain yield and precipitation at different stages, among which FP0: precipitation during fallow; FP1: precipitation from fallow to jointing; FP2: precipitation from fallow to tasseling; FP3: precipitation from fallow to filling. B shows the relationship between grain yield and soil water storage before sowing and the sum of precipitation at different stages. SP0: soil water storage before sowing; SP1: soil water storage before sowing + precipitation from sowing to jointing; SP2: soil water storage before sowing + precipitation from sowing to tasseling; SP3: soil water storage before sowing + precipitation from sowing to filling. ** indicates significant at the 0.01 probability level.