基于土壤有机质含量推荐的旱地冬小麦施氮量研究

蒋龙刚,黄明,宋庆赟,苑爱静,李嘉华,邱炜红,王朝辉

Research on Nitrogen Fertilizer Application Recommended Method Based on Soil Organic Matter in Dryland Wheat Production

JIANG LongGang,HUANG Ming,SONG QingYun,YUAN AiJing,LI JiaHua,QIU WeiHong,WANG ZhaoHui

表2 土壤有机质丰缺指标及其优化施氮系数

Table 2 Soil organic matter supply capacity indexes and their recommended N fertilization coefficients

土壤有机质指标 Soil organic matter index 0—20 cm土层有机质含量 Organic matter content in 0-20 cm soil layer (g·kg-1) 施氮系数 N fertilization coefficient, Nf 极低Very low <8 1.2 低Low 8—12 1.1 中等Middle 12—16 1.0 高High 16—20 0.9 极高Very high >20 0.8