引用本文:于东升,史学正.红壤区不同生态模式的“土壤水库”特征及其防洪减灾效能[J].土壤学报,2003,40(5):656-664. DOI:10.11766/trxb200111210503
Yu Dong-sheng,Shi Xue-zheng.CHARACTERISTICS OF SOIL-WATER RESERVOIR AND THEIR EFFICIENCY IN FLOODING CONTROL UNDER DIFFERENT ECOLOGICAL PATTERNS OF RED SOILS IN THE SOUTH OF CHINA[J].Acta Pedologica Sinica,2003,40(5):656-664. DOI:10.11766/trxb200111210503
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 1361次   下载 1683 本文二维码信息
码上扫一扫!
分享到: 微信 更多
红壤区不同生态模式的“土壤水库”特征及其防洪减灾效能
于东升, 史学正
中国科学院南京土壤研究所, 南京, 210008
摘要:
本文在江西红壤区选择5种具有代表性的红壤生态利用模式:稀疏林生态(Ⅰ)、林草生态(Ⅱ)、草灌生态(Ⅲ)、经果生态(Ⅳ)、农田生态(Ⅴ)和对照模式侵蚀裸地(Ⅵ),利用人工模拟降雨仪研究和分析了不同生态模式“土壤水库”调节雨水的特征及其防洪减灾效能。结果表明,红壤区土壤入水通道受阻是“土壤水库”发挥防洪减灾效能的主要障碍因子;人工草灌生态模式(Ⅲ)的防洪减灾效能最好;经果生态模式(Ⅳ)不但具有较高的防洪减沙效能,而且具有较高的经济效益,是该区首选模式。
关键词:  土壤水库  防洪减灾  生态模式  红壤
基金项目:* 中国科学院南京土壤研究所所长基金(005102);中国科学院红壤生态实验站开放基金;国家重点基础研究发展规划项目(G1999011810)资助
CHARACTERISTICS OF SOIL-WATER RESERVOIR AND THEIR EFFICIENCY IN FLOODING CONTROL UNDER DIFFERENT ECOLOGICAL PATTERNS OF RED SOILS IN THE SOUTH OF CHINA
Yu Dong-sheng, Shi Xue-zheng
Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
Abstract:
‘Soil water reservoir' was defined as a space that reserve and transport the soil water in the soil, and total pore space of the soil as maximum available volume of the reservoir. The volume of pore space and the water transportation capability of soil are two of the important reservoir characteristics. In this paper, the efficiency of the ‘soil water reservoir' on flooding control were studied by simulator rainfall in the south of China with 5 typical ecological patterns of red soils, such as sparse wood (Ⅰ), wood-grasses (Ⅱ), grasses-brushwood (Ⅲ), economic orchard (Ⅳ), crop land (Ⅴ), and bare land (Ⅵ) as contrast. Water balance factors of soils were measured and estimated respectively in the experiments, such as rainfall (P), water in-come (F), water reserved (W) in soil, water discharged (D), surface runoff (R) and soil maximum saturated infiltration (F'). Results show that a main obstructive factor resulted in that ‘soil water reservoir' decreased the capacity of flooding control in the red soil area, is that the channel, through which water come into soil, was blocked or partly blocked. The grasses-brushwood (Ⅲ) is the most efficient one of 5 patterns to control flooding, the economic orchard (Ⅳ) pattern is suggested to be used in the area as the first one in sequence because of not only with higher efficiency of flooding control but with higher economic benefits. It is necessary to improve the efficiency of soil's flooding control in the area by protecting wood grasses and brushwood grasses from damage, recovering wood and grasses land from crop, increasing degree of surface grasses-cover in the sparse wood. The results also show that the soil water reservoir theory is available to be used to assess the flooding control function of soils. Capabilities of the ‘soil water reservoir', including soil water reserve and water transport, are most important when we study on ‘soil water reservoir' to control flooding. How to increase soil infiltration? It is a key to improve efficiency of the reservoir on control flooding.
Key words:  Soil water reservoir  Flooding control  Ecological pattern  Red soil