湖南省主要森林类型林地土壤持水功能及其改良技术

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4102.9hm^2，有效贮水量为830.2hm^2；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1049.7,534.5,764.0t/hm^2。在天然林中，近成熟林知成熟林、中龄林、幼林分别为1285.1,1065.4,798.5t/hm^2；人工林3个龄级的森林分别为642.5,563.0,534.5t/hm^2。根据目前森林结构质量差、贮水功能偏低的现象，提出了湖南林地土壤持水性能改良的技术对策。

Improving Techniques and Water Main Forest Types Preserving Capability of Soil Under in Hunan Province

It has been known from studying on 37 forest types that the water storing level of forest in Hunan province is very low .The average total quantity of water storing is 4102.9 t/hm²,and the effective quantity of it is 830.2t/hm²; The largest effective quantity of water storing in natural forest,artificial forest and ecological forest of simulating natural reaches 1049.7 t/hm²,534.5t/hm² and 764.0 t/hm² respectively. The largest effective quantity of water storing of natural forest,middle-age forest and young growth forest of natural forest reaches 1285.1/hm²,1065.4/ hm²and 798. 5 t/hm² respectively;The 3 ages classifacation of artificial forest are 642.5t/hm²,563.0 t/hm² and 534.5 t/hm². The techniques for water preserving capability improving in forest land were advanced acxeording the low quality and its low function of water storing.