湖南省主要森林类型林地土壤持水功能及其改良技术

Improving Techniques and Water Preserving Capability of Soil Under Main Forest Types in Hunan Province

通过对 37个森林类型的研究得知 ,湖南省森林的贮水水平偏低 ,全蓄水量平均为 410 2 .9hm2 ,有效贮水量为 830 .2 hm2 ;天然林、人工林、林下造林形成的模拟自然生态林一次最大有效贮水量分别为10 49.7,5 34.5 ,76 4.0 t/ hm2 。在天然林中 ,近成熟林和成熟林、中龄林、幼林分别为 12 85 .1,10 6 5 .4,798.5 t/ hm2 ;人工林 3个龄级的森林分别为 6 42 .5 ,5 6 3.0 ,5 34.5 t/ hm2。根据目前森林结构质量差、贮水功能偏低的现象 。

It has been known from studying on 37 forest types that the water storing level of forest in Hunan province is very low. The average total quantity of water storing is 4 102.9 t/hm 2, and the effective quantity of it is 830.2 t/hm 2; The largest effective quantity of water storing in natural forest, artificial forest and ecological forest of simulating natural reaches to 1 049.7 t/hm 2, 534.5 t/hm 2 and 764.0 t/hm 2 respectively. The largest effective quantity of water storing of mnatural forest, middle age forest and young growth forest of natural forest reaches to 1 285.1 t/hm 2, 1 065.4 t/hm 2 and 798.5 t/hm 2 respectively; The 3 ages classifacation of artificial forest are 642.5 t/hm 2, 563.0 t/hm 2 and 534.5 t/hm 2. The techniques for water preserving capability improving in forest land were advanced according to the low quality and its low function of water storing.