广东的滨海沙土资源

滨海沙土是广东沿海重要而急待改造利用的一种国土资源。分布广、面积大,风沙为害较甚。它集中分布在琼东北和西南部、陆丰至海丰、阳江至广州湾沿岸一带。主要因河流和地表径流携带的泥沙受潮浪、风力作用逐渐发育而成。按形成时间和特性,可分流动、半固定、固定和耕型沙土等亚类。并具有沙瘦的共同特性。改造利用主要措施是营林绿化。其次,是因地制宜地积极发展果蔬、热作等经济作物,改造沙荒草地,发展畜牧业,施肥改土,兴修水利和开发其旅游资源。

THE COASTAL SANDY SOIL RESOURCES IN GUANGDONG

Coastal sandy soil is an important land resource that has to be improved urgently in Guangdong Province. It is widespread, large in area and has a direct effect on the raise of the living standard of the local inhabitants, the economic development and the improvement of ecological environments. Coastal sandy soil is mainly distributed in Hainan Island, the western and the eastern Guangdong. The formation of it is closely related with coastal landform, river hydrology and climate. A large number of mud and sand carried by rivers and surface runoff, under the different actions of tide, wave and wind, makes outer bar and sand beach form and develops gradually. According to its differences of soil-formation age and soil characteristics, coastal sandy soil can be divided into four subgroups: mobile, half-fixing, fixing and cultivated coastal sandy soils. Their common characteristics are (1) that they are sandy so that water and fertilizer can lose easily and (2) that nutrition is lacking and soil are poor. The improvement and utility of coastal sandy soil should be (1) building shelterbelts; (2) developing multiindustry; (3) improving and using uncultivated sand land; (4) spreading organic fertilizer in order to improve sandy soil; (5) building water conservancy projects and (6) developing tourist resources.