旱作种植条件下基础地力贡献率演变特征及影响因素分析

李官沫,张文菊,曲潇琳,乔磊,黄亚萍,徐虎,徐明岗

Evolution Characteristics and Influencing Factors on Inherent Soil Productivity Across Dryland

LI GuanMo,ZHANG WenJu,QU XiaoLin,QIAO Lei,HUANG YaPing,XU Hu,XU MingGang

表2 土壤养分因素及pH分组标准

Table 2 Grouping standard of soil nutrient factors and pH

土壤性状等级 Soil property level 有机质 Soil organic matter (g·kg-1) 全氮 Total nitrogen (g·kg-1) 有效磷 Available phosphorus (mg·kg-1) 速效钾 Available potassium (mg·kg-1) pH Ⅰ >25 >1.5 >40 >200 >8.5 Ⅱ 20-25 1.25-1.5 30-40 150-200 7.5-8.5 Ⅲ 15-20 1-1.25 20-30 100-150 6.5-7.5 Ⅳ 10-15 0.75-1 10-20 50-100 5.5-6.5 Ⅴ ≤10 ≤0.75 ≤10 ≤50 ≤5.5