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南亚热带丘陵赤红壤地区水热资源丰富,可大力发展荔枝、龙眼、香蕉、芒果等岭南佳果基地和高效益的蔬菜的种植,是广东省以至全国的一块得天独厚的宝地。本文分析了南亚热带的自然概况、广东南亚热带地区的优势及丘陵赤红壤的特征。研究了广东省南亚热带丘陵赤红壤受气候因素的制约,土壤贮水库容和有效库容小,下层非饱和导水率及土壤水力扩散度低等水分特性及问题。提出了改善生态环境,利用生物或工程措施截流降雨、减少地表径流,提高降雨入流率从而增加土壤贮水量和有效贮水量,通过改良土壤,提高土壤保水性能和土壤供水能力,采取防止或减缓土壤水分蒸发措施,发展节水灌溉技术等土壤水分调控与管理技术措施。
South subtropical hilly red soil area rich in water and heat resources, can develop lychee, longan, banana, mango and other Lingnan good fruit base and high-efficiency vegetable cultivation, Guangdong Province and the country a unique treasure. This article analyzes the natural profile of the South Asian tropics, the advantages of the southern subtropical region of Guangdong and the characteristics of hilly red soil. This paper studied the influence of climatic factors, soil water storage capacity and effective storage capacity, low unsaturated hydraulic conductivity and low soil water diffusivity on the southern subtropical hilly red soil in Guangdong Province. It is proposed to improve the ecological environment by using biological or engineering measures to intercept rainfall, reduce surface runoff and increase rainfall inflow rate so as to increase soil water storage capacity and effective water storage capacity. By improving soil, improving soil water retention capacity and soil water supply capacity, Water evaporation measures, the development of water-saving irrigation techniques and other soil moisture regulation and management technical measures.