论文部分内容阅读
我国西北黄土高原由于植被稀少,水土流失严重,对当地农业生产不利,应迅速增加这一地区的植被覆盖率。增加植被的方法除了人工造林种草外,还可采取封禁措施以消除对植被发育的不利因素,促进植被自然恢复。高原上除少数山地森林和次生梢林外,绝大部分地区光秃裸露,且气候条件干旱严酷,是否能通过封禁恢复植被呢?为了解决这一问题,我们于1973～1974年通过对黄土高原水土流失区的植被调查研究,尤其是调查总结当地群众封山育林、封山育草的宝贵经验后,认为在现在的气候条件下,只要在一定时期内消除不合理的
In the northwestern Loess Plateau, due to the rare vegetation, serious water and soil loss and unfavorable to local agricultural production, the vegetation coverage in this area should be rapidly increased. In addition to artificial afforestation, the measures to increase vegetation can also be banned to eliminate the unfavorable factors on vegetation development and promote the natural recovery of vegetation. In addition to a small number of mountain forests and secondary shoots on the plateau, the vast majority of areas bare bare, and the harsh climatic conditions, whether to restore vegetation by blocking it? In order to solve this problem, we in 1973 ~ 1974 through the loess In the plateau soil and water loss area vegetation investigation and research, especially the investigation and conclusion of the local people closing hillsides afforestation, closing hillsides and grass breeding valuable experience, that under the current climate conditions, as long as in a period of time to eliminate unreasonable