花江低热河谷区不同退耕还林模式植被恢复效益研究

对贵州花江低热河谷区不同退耕还林还草模式进行调查研究,结果表明,柚木林模式在退耕还林中高生长和茎生长以及植被覆盖率都取得了较大的效益,其次为花椒生态经济林模式,而林草结合模式以及柿树林模式因农户管护力度相对滞后导致效果不如前者,但总体水平上退耕还林后花江地区植被覆盖率增加,恢复了石漠化植被景观。表明退耕还林模式的建立在考虑生态效益的同时,还应考虑农户经济收入,实现可持续的林业生产机制,推动地方经济发展,从真正意义上改善该地区生态环境面貌和贫穷落后的经济面貌。

Study on the Vegetation Recovery Benefit from Different Conversions of Farmland to Forests Models in Huajiang Area of Low-heat River Valley

An investigation of different models of cropland retirement for afforestation in Huajiang Low-heat River Valley area in Guizhou was conducted.The thandahat forest model displayed more benefit in reforesting growth of height and diameter as well as vegetation coverage compared with Zanthoxylum bungeanum and the maxim was the ecological economic forest model.However,there was less efficacy for forestry and husbandry integration as well as Diospyros kaki model due to the inability of management and protection from farmers,compared with the above-mentioned models.Generally,the it increased the vegetation coverage with time in Huajiang area and recovered the rock desertification vegetation landscape.It was suggested that the estimation of the conversion of farmland to forests model should take both the ecological benefit and economical income into account,therefore,the forest industry sustainable development should be maken for the contribution to local economic development.To improve the ecological environment and the poor economy in this area it was the key to keep the success of this project.