南亚热带丘陵赤红壤区农业可持续发展的土壤水分管理(英文)  

Management of soil water based on agriculture sustainable development in Hilly Latored soil area of South Subtropics in Guangdong

作　　者：郭庆荣[1] 钟继洪[1] 万洪富[1] 谭军[1] 

机构地区：[1]广东省生态环境与土壤研究所,广州510650

出　　处：《生态科学》2003年第1期73-76,共4页Ecological Science

基　　金：本工作由国家自然科学基金(49371035);广东省重大专项项目(206A,20010258C);广东省自然科学基金(970386,980006,000188);广东省环保局科学研究开发项目(2001-14);广东省农业环境综合治理重点实验室项目资助

摘　　要：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。Because of very thick weathered layer, intensive penetrability and loose structure, abundance of heat and water resources of Hilly Latored Soil Area of South Subtropics in Guangdong may provide an advantage for farming . Two problems related to the soil water for the sustainable development of agriculture in this area, including the very low water infiltration in the wet seasons, resulting in water and soil erosion, and the drought condition in the dry seasons from October to February of next year for the crops with shallow roots. The seasonal fluctuation of water condition is one of the main reasons for the seasonal drought of soil and some shallow-rooted crops. The soil water storage capacity and the available water content are very low, combined with low unsaturated hydraulic conductivity and hydraulic diffusivity. Some biological or engineering techniques and measurements of regulating and managing soil moisture are proposed to improve soil moisture and prevent or decrease soil evaporation for agriculture sustainable development.

关 键 词：南亚热带 丘陵赤红壤区 农业 可持续发展 土壤 水分管理 土壤贮水量 有效贮水量 

分 类 号：S157[农业科学—土壤学]