永顺县退耕还林试验示范区模式配置研究

在永顺县勺哈乡退耕还林试验示范区进行立地类型划分与评价的基础上，在各立地类型区根据各自不同的特点进行了模式和林种树种配置。示范区内共配置了保土经济林还林模式、土壤保持还林模式、块状混交还林模式、山顶防护型还林模式与封山育林模式等5个模式，在各模式中配置了柑桔、板栗等经济树种和杉木、木荷、青榨槭、桤木、马尾松等用材树种。

Disposition of a sampled land type in the return of the cultivated land for forest in Yongshun county

The results of a study based on the distribution and appraisal of cultivated land returned to forest for forest program of Shaoha village of Yongshun county is presented. The type and plants species were disposed in different site types by different characters. The five types in sample land are as follows: return economic forest for keeping soil type, return forest for keeping soil type, mixed block return forest type, return forest in the top of mountain type and return forest in forbidden cutting type. The economic species examined included Citrus reticulate, Castanea mollissima and ommercial forest species such as Cunninghamia lanceolata, Schima superba, Acer, Alnus cremastogyne Burk and Pinus massonia.