低丘红壤地区人工植被模式探讨

Studies on the models of anthropogenic vegetation on red earth in low hills:

研究表明，低丘红壤地区岗顶人工植被，在保持水土、减少土壤养分流失和经济效益方面植树造林模式优于种植草被；坡地人工植被的生态效益防护林—桔园模式优于无防护林桔园模式。杉木是低丘红壤地区人工植被建造的优良树种。防护林带的防护效果与林带走向、高度和树种搭配有关，主林带与风害方向垂直，林带树木越高以及针叶阔叶树种混交的林带防护效果佳。

The role of conservating soil and water and decreasing soil nutrient runoff loss and the economic effect of plantation were more significant than those of planting grass in anthropogenic vegetations on the top of low hills in red earth area. The ecological effect of the orchard-shelterbelt model is better than that of the orchard model in the gental sloping fields. Chinese fir is one of good tree species during establishing anthropogenic vegetations on red earth in low hills. The tree species of shelterbelt. The higher the tree height of shelterbelt, the bigger the protective range of shelterbelt. If the shelterbelt is a theropencedrymion and verticaldistrubution to the main wind orientation, its protective effect will be better.