连续施用土壤改良剂对沙质潮土肥力及活性有机碳组分的影响

周吉祥,张贺,杨静,李桂花,张建峰

Effects of Continuous Application of Soil Amendments on Fluvo- Aquic Soil Fertility and Active Organic Carbon Components

ZHOU JiXiang,ZHANG He,YANG Jing,LI GuiHua,ZHANG JianFeng

表3 土壤各属性分级标准值

Table 3 The grading standards of soil properties

分级 Grade pH (H2O) 有机质 Organic matter (g·kg-1) 全氮 Total N (g·kg-1) 速效磷 Avail. P (mg·kg-1) 速效钾 Avail. K (mg·kg-1) Xa 4.5 20 1.0 10 100 Xc 6.5 30 1.5 20 150 Xp 8.5 40 2.0 40 200