宁夏引黄灌区春小麦氮磷钾需求及化肥减施潜力

王西娜,于金铭,谭军利,张佳群,魏照清,王朝辉

Requirement of Nitrogen, Phosphorus and Potassium and Potential of Reducing Fertilizer Application of Spring Wheat in Yellow River Irrigation Area of Ningxia

WANG XiNa,YU JinMing,TAN JunLi,ZHANG JiaQun,WEI ZhaoQing,WANG ZhaoHui

表2 宁夏引黄灌区春小麦氮、磷、钾施肥量分级标准

Table 2 Grading standard of N, P, and K fertilizer rates for spring wheat in the Yellow River Irrigation Region of Ningxia

养分 Nutrient 施肥等级Fertilization grade (kg·hm-2) 很低Very low 偏低Low 适中Middle 偏高High 很高Very high N <90 90-180 180-225 225-375 >375 P2O5 <60 60-120 120-180 180-200 >200 K2O <60 60-80 80-100 100-120 >120