【摘要】 林地是森林水源涵养效益的主体,通过对秭归县10种退耕还林模式的土壤物理性状和林地水源涵养效益的研究,结果表明:(1)退耕还林后土壤总孔隙度增加4·3%~20·2%,除柏木林外,非毛管孔隙度增加6·8%~494·2%;(2)退耕还林后土壤饱和蓄水量增加5·7%~118·8%,非毛管蓄水量为坡耕地的2·58~19·13倍;(3)秭归县退耕还林森林土壤的蓄水量为171·6万m3/a,是相似立地条件下农耕地的3·21倍。更多还原

【Abstract】 Forestland is the principal part of forest to conserve water. The soil properties and water conservation function of 10 types of converting land for forest were studied in Zigui county, the results showed:(1)The total soil porosity and non-capillary soil porosity increased from 4.3% to 20.2% and 6.8% to 494.2% respectively after converting land for green; (2) and the soil saturation water capacity increased from 5.7% to 118.8%, the non-capillary water capacity was over 2.58~19.13 times to sloping field; (3)the soil capacity of converting land for green in Zigui county was 171.6 ten thousand m~ 3 /a,it was 3.21 times to cultivated slope with similar site condition.更多还原