洞口县石漠化地区造林树种初选

通过对洞口县石漠化现状和造林成林率调查，结果表明：洞口县石漠化区杉木、马尾松、柏木、阔叶林的现有林面积所占比例差异明显，人工造林成林率差异极显著。柏木林的现有林面积所占比例和人工造林成林率远远大于杉木林和马尾松林，阔叶林仅次于柏木林，马尾松林介于阔叶林和杉木林之间，杉木的林最小。柏木是石漠化地区首选造林树种，其次是阔叶树；营造柏木、阔叶树纯林或柏木与阔叶树混交林可作为洞1：7县及其相同生境石漠化地区主要造林模式；马尾松纯林可作为辅助造林模式应用；杉木不适宜在石漠化土地上生长，不宜作为石漠化地区造林树种。

Afforestation species selection in rocky desertification region of Dongkou County

The status quo of rocky desertification and the survival rate of afforestation in Dongkou County were investigated. The results showed that, there were obvious difference in the proportion of existing forest area among the China fir, Pinus massoniana, Cupressus funebris and broad-leaved forest, and there were very significant difference in the survival rate of afforestation among them. The proportion of existing forest area and.the survival rate of afforestation of Cupressusfunebris forest were far greater than those of China fir and Pinus massoniana forest, the broad-leaved forest was second only to Cupressus funebris forest, Pinus massoniana forest was between the broad-leaved forest and the China fir forest, while the China fir forest was the smallest one. Cupressus funebris was the preferred afforestation species in rocky desertification region, followed by the broad-leaved trees. Constructing the Cupressus funebris forest, broadleaved forest or the mixed forest of Cupressusfunebris and broad-leaved tree were the major afforestation mode in Dongkou County and its same habitats rocky desertification area. Pinus massoniana forest could be applied as an auxiliary afforestation mode. China fir was not appropriate in rocky desertification land, so it should not be as afforestation species in rocky desertification area.