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

表1 供试土壤试验前化学基本性质

Table 1 Soil basic chemical properties before experiment

土层深度 Soil depth (cm) 有机质 Organic matter (g kg-1) 全氮 Total N content (g kg-1) 全磷 Total P content (g kg-1) 全钾 Total K content (g kg-1) 碱解氮 Alkali-hydro nitrogen (mg kg-1) 速效磷 Available P content (mg kg-1) 速效钾 Available K content (mg kg-1) 0-20 11.38 0.98 0.79 11.15 56.02 28.39 277.36 20-40 8.53 0.81 0.65 10.41 38.20 24.89 283.09 40-60 8.02 0.63 0.71 11.53 25.74 21.78 233.95