论文部分内容阅读
全球的干早土地大部分分布在第三世界国家。它们的根本性质是干旱,植物覆盖的突出特征是生产力低下。文章分别分析了具有夏雨和冬雨特征的干旱气候条件下,草地植被、木本植物及植物覆被成分在生态基础方面的差异。为了人类的需要,未来恢复干旱区植物覆被的工作一定要以可持续性和高产量为根本。这项工作包括既要尽可能地恢复自然植物覆被也包括重建人工植物覆被,在形式上最好能与地表水和地下水的水力资源相适应。应当禁止在生产力低的草地上过度放牧,要支持更稳定的饲养制度。这种变化需要农村和城市长期的同步发展。
Most of the dry land in the world is distributed in third world countries. Their fundamental nature is drought, and the salient feature of plant cover is poor productivity. The paper analyzes the ecological basis differences of grassland vegetation, woody plants and plant coverings under the arid climate with summer rains and winter rains. In order to meet the needs of mankind, the future work of restoring plant cover in arid areas must be based on sustainability and high yield. This work includes both the restoration of natural plant cover as much as possible and the reconstruction of artificial plant cover, ideally suited to the hydraulic resources of surface and groundwater. Overgrazing on low productivity grasslands should be prohibited, and a more stable feeding system should be supported. This change requires the long-term, simultaneous development of rural areas and cities.