广西龙胜县里骆林场杉木人工林生态系统的水量结构、分配与平衡

根据１９８０～１９９０年的定位观测．广西龙胜县里骆林场２３～３３年生杉木人工林生态系统的自然贮水量结构为：乔木层１７．２ｍｍ．灌木层０．１ｍｍ．草本层０．９ｍｍ．枯枝落叶层０．２ｍｍ．土壤层３５４．７ｍｍ；依次占系统总贮水量的４．６１％、０．０３％、０．２４％、０．０５％、９５．０７％。系统对大气降水的年分配为：林冠截留１９８．５ｍｍ，灌草截留２７．２ｍｍ，枯枝落叶截留７８．０ｍｍ，地表径流１４．７ｍｍ，地下渗透６５．９ｍｍ，土壤持水３５４．７ｍｍ，蒸散量８７０．１ｍｍ；依次占年降水量的１２．９１％、１．７７％、５．０７％、０．９６％、４．２９％、２３．０６％和５６．５８％。

The Water Constitution, Distribution and Balance of Cunninghamia lanceolata Artificial Forest Ecosystem in Longsheng of Guangxi

Based on the fixed-position observations from 1980 to 1990 on Lilo forest farm of Longsheng county, Guangxi, the natural moisture constitution in 23 to 33 years old Cunninghamia lanceolata artificial forest ecosystem is 17. 2 mm at tree synusia, 0. 1 mm at shrub synusia, 0. 9 mm at herb synusia, 0.2 mm at litter layer, 354.7 mm at soil layer, and taking up 4.61 %,0.03%, 0.24%, 0.05% and 95. 07% of the total moisture respectively. The annual distribution of the precipitation in the ecosystem is Crown-interception 198. 5 mm, shrub-and herb-interception 27. 2 mm, litter-interception 78. 0 mm, surface runoff 14. 7 mm, underground seepage 65. 9 mm, soil water retained 354. 7 mm, evapotranspiration 870. 1 mm, and taking up 12. 91%, 1. 77%, 5. 07%, 0. 96%, 4. 29%, 23. 06% and 56. 58% of the annual precitation respectively.