退化红壤肥力恢复性能与土壤性质的关系

Fertility Resilience of Degraded Red Soils in Relation to Soil Properties

研究了自然封禁条件下亚热带地区因水土流失导致的退化红壤肥力恢复性能与土壤性质的关系。结果表明 ,影响退化红壤肥力恢复主要有水分因素和养分因素 ,其中水分因素决定了土壤肥力能否自然恢复 ,对于土层浅薄、砂化严重的土壤 ,由于蓄水能力极低 ,季节性干旱使植被和土壤肥力难以自然恢复。土壤肥力的恢复还与土壤本身的养分状况存在着一定的联系 ,养分较高的土壤 ,较易恢复植被 。

Fertility resilience of degraded red soils in natural condition as affected by soil properties was evaluated. The results showed that fertility resilience of degraded red soil was strongly affected by moisture condition and soil nutrients. Moisture capacity, which was significantly correlated with clay content and depth of soil, determined probability of natural resilience of soil fertility, the red soils with thin layer and low clay content, because of low moisture capacity, were difficulty to restore soil fertility in natural condition. Resilience of soil fertility was also related with soil nutrients, the soils with high level of nutrients were easy to restore vegetation, improving soil fertility.