【摘要】 土壤水文-物理性质是森林生态系统水文生态功能研究的重要组成部分,但对于巨尾桉人工林不同连栽代数水文_物理性质的研究少见报导。本文于2001—2005年在广西东门林场尾巨桉不同连栽代数(1,2,3代)人工林中进行土壤水文-物理性质的测定。结果表明:①不同代数土壤容重均随土层深度的增加而递增,其递增量为0.0060～0.2804g·cm-3;造林后的土壤容重一般比造林前小0.0043～0.3148g·cm-3;相同土层的多年平均容重显示出3代>1代>2代,但差异不显著。②不同代数土壤总孔隙度的多年平均值一般随土层深度的增加而递减;造林后土壤总孔隙度随林龄增加有所递减;总孔隙度平均值显示出2和1代略大于3代的规律。③造林后的第4年,不同代数土壤持水量(最大、毛管、田间)比造林前有所增加,以后一般随林龄的增加有所递减;1m土层贮水量的多年平均值变动在833.2～1100.8t·hm-2之间,显示出3代大于1和2代的规律。④不同代数土壤通气度的多年平均值变动在12.5%～24.0%之间,并随土层深度的增加而降低;相同层次土壤通气度随着代数增加而减小。更多还原

【Abstract】 The soil hydrology-physical properties is one important part of the eco-hydrology functions in forest ecosystem, while such study in Eucalyptus urophylla×E. grandis continuous plantations was scarce in china. So, the soil hydrology-physical properties of 1, 2, 3 rotations in Eucalyptus continuous plantations were studied in Dongmen Forest Farm in Guangxi province, China. The results showed: (1) The soil bulk densities in different rotations of continuous plantations increased with soil depth, and the increase rate was form 0.006 0 g·cm-3 to 0.280 4 g·cm-3. Besides, the soil bulk densities after afforestation were 0.004 3～0.314 8 g·cm-3 smaller than those before afforestation, and the order of mean annual soil bulk densities at the same soil layers was: 3 rotation >1 rotation>2 rotation, but no significance values were found. (2) The mean annual values of total soil porosity decreased with soil depth and stand age. The order of mean annual values of total soil porosity was: 2 , 1 rotations >3 rotation. (3) 4 years after afforestation, soil moisture contents (maximum, capillary, field water holding capacity) increased comparing to those before afforestation, and subsequently decreased with prolonged stand age. The mean annual values of 1 m soil water holding capacity were mainly between 833.2～1 100.8 t·hm-2, and the order of 1 m soil water holding capacity was: 3 rotation>1, 2 rotations. (4) The mean annual values of soil air permiability among various rotations decreased with soil depth, which changed between 12.5%～24.0%, and decreased with the increase of rotations at the same soil layers.更多还原