退蚕还林对枯落物储量和持水性能的影响  

The Litter Storage and Water-holding Properties on the Forestland Converted from Tussah forest

作　　者：赵刚[1] 尤文忠[1] 邢兆凯[1] 魏文俊[1] 颜廷武[1] 张慧东[1] 

机构地区：[1]辽宁省林业科学研究院,辽宁沈阳110032

出　　处：《水土保持学报》2009年第4期82-85,共4页Journal of Soil and Water Conservation

基　　金：国家科技支撑计划项目(2006BAD03A0903)

摘　　要：对柞蚕场和柞蚕场根刈后封山育林9年、12年、21年的4种类型柞林枯落物储量和持水性能进行了研究,结果表明:柞蚕场和封育9年、12年、21年的枯落物储量分别为3.69 t/hm2,7.92 t/hm2,8.41 t/hm2,8.74t/hm2,最大持水量分别为6.23 t/hm2,14.71 t/hm2,15.81 t/hm2,17.18 t/hm2;持水过程显示枯落物均1h持水量最大,8 h开始趋于饱和,枯落物吸水速率与浸水时间的关系可用S=Ktn来表达;柞蚕场和封育9年、12年、21年枯落物层有效拦蓄量分别为4.75 t/hm2,10.87 t/hm2,11.70 t/hm2,12.78 t/hm2,有效拦蓄降水深度分别比柞蚕场增加了0.60 mm,0.69 mm,0.80 mm。Studies on storage and water-holding properties of litter of Tussah forest,closure forests after root-clipping for 9 a,12 a and 21 a were conducted. The results showed that the total storage of litter layer for the tussah forest was 3.69 t/hm^2, and closure forests after root-clipping for 9 a was 7. 92 t/hm^2, 12 a was 8.41 t/hm^2 and 21 a was 8. 74 t/hm^2. The maximum water capacity were 6.23t/hm^2 ,14. 71 t/hm^2 ,15.81 t/hm^2 ,17. 18 t/hm^2 respectively. In our experiment, it indicated that the water-holding capacity were the strongest in 1 h. The absorption rates were decreased while dipping in water. Water in there litter layer reached saturation in 8 h. The relationship between absorption rate and immersion time was S-----Kt^n. The modified interception amount of the four kinds of forests were 4.75 t/ hm^2, 10. 87 t/hm^2, 11.70 t/hm^2, 12. 78 t/hm^2 respectively, and they were commensurate with increase of precipitation depth about 0. 60 mm,0. 69 mm,0. 80 mm.

关 键 词：柞蚕场 封山育林 枯落物 最大持水量 

分 类 号：S715.3[农业科学—林学]