喀斯特地区不同森林类型枯落物储量及其持水特性比较

Comparison on Litter Storage and Water Holding Characteristics of Different Forest Types in Karst Area

对施秉县白云岩区4种森林类型枯落物的存储量和持水特性进行研究。结果表明:所有森林类型的总枯落物现存量变动范围为8.6t/hm^2~37.1t/hm^2,枯落物总现存量大小依次为水竹林(37.1t/hm^2)﹥针阔混交林(28.9t/hm^2)﹥阔叶林(26.7t/hm^2)﹥针叶林(8.6t/hm^2);阔叶林持水率最大(543.16%),针叶林最小(357.92%);枯落物层的持水率与浸泡时间呈显著对数关系,而吸水速率与浸泡时间呈显著幂函数关系。本研究结果可为喀斯特石漠化治理和植被恢复提供重要科学依据。

The litter storage and water holding characteristics of 4 forest types in the dolomite region of Shibing county were studied. The results showed that the variation range of total litter storage of all forest types was 8. 6 t/hm^2 to 37. 1 t/hm^2,and the total litter storage was in order of bamboo forest（ 37. 1 t/hm^2） 〉coniferous broad-leaved mixed forest（ 28. 9 t/hm^2）〉 broadleaf forest（ 26. 7 t/hm^2） 〉coniferous forest（ 8. 6 t/hm^2）; the water holding rate of broad-leaved forest was the largest（ 543. 16%）,and coniferous forest was the smallest（ 357. 92%）. There was a significant logarithmic relationship between the water holding rate and the soaking time of the litter layer,while the water absorption rate showed a significant power function relationship with the soaking time. This paper was expected to provide important scientific basis for the management of rocky desertification and vegetation restoration in Karst area.