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本文根据在海南岛尖峰岭林区半落叶季雨林—褐色砖红壤上所进行的游耕农业生态后果的实验研究,论证了热带森林土壤资源退化的四个方面:凋落物层烬失,使土壤养分补给源和水文功能减弱;水土流失严重;水分的输导、涵贮能力降低;上壤理化性状劣变,肥力下降。文章提出了废除游耕制,建立以木本植物为主的林—农制;合理规划和经营热带林;停止炼山全垦法,推行生态造林技术等项建议,以培育和保持地力,保护热带森林土壤资源。
In this paper, based on the experimental study on agroforestry of semi-deciduous monsoon forest-brown brick red soil in Jianfenglin forest area of Hainan Island, the paper demonstrates four aspects of soil resource degradation in tropical forest: litter loss, Nutrient supply source and hydrological function weakened; serious soil erosion; water transport, storage capacity reduced; soil physical and chemical properties deterioration, fertility decline. The article proposed the abolition of the system of cultivation of tillage, the establishment of forest-agrifood system based on woody plants, the rational planning and management of tropical forests, the cease-fire cultivation practice and the implementation of ecological afforestation techniques to nurture and maintain fertility, protect Tropical forest soil resources.