不同措施红壤坡地与梯田土地生产潜力  

Land Potential Productivity of Red Soil Slope Land Regarding Different Measures

作　　者：张国华[1] 谢崇宝[1] 皮晓宇[2] 左长清[3] 

机构地区：[1]中国灌溉排水发展中心,北京100054 [2]北京市朝阳区水务局,北京100026 [3]中国水利水电科学研究院,北京100048

出　　处：《山地学报》2015年第3期288-293,共6页Mountain Research

基　　金："十二五"国家科技支撑课题"村镇饮用水源保护和污染防控技术研究"(2012BAJ25B01)~~

摘　　要：南方红壤地区是我国热带和亚热带经济及粮食作物的重要生产基地,开展不同措施红壤坡地土地生产潜力关系的研究,对指导人们合理开发利用该类土壤资源具有重要的现实意义和科学价值。基于气候-土壤生产潜力计算模型,以土壤养分作为修正函数,综合考虑气候因子和土壤因子对土地光温生产潜力的影响,以红壤坡地3种生态治理措施和裸露坡地为研究对象,以实测的不同措施坡地土壤化学性质为基础,提出了红壤坡地土地生产潜力计算方法。以柑橘为例,定量分析了不同措施对红壤生产潜力的影响,研究结果显示前埂后沟梯壁植百喜草的梯田果园(措施Ⅱ)土地生产潜力最大,较裸露地坡地提高了300多倍。研究结果表明,由于南方红壤地区降水多,水分不是作物生长的主要限制因子;而随着水土流失的增加,土壤养分满足作物生长需求的程度下降,其中速效磷对作物生长的限制程度最大。The red-soil region of the tropical and sub-tropical area, located in South China, is one of important cases for tropical cash and food crops base within tropical and subtropics regions. Conducting the research on potential productivity of slope with red soil is very useful to develop and utilize the soil resources. Based on the EPIC （Environmental Policy-Integrated Climate） model. A computation method for potential productivity of slope land with red soil is set up in this paper. Soil nutrients are taken as the modified function in the method. With the impacts of weather and soil on thermal production potential considered, three kinds of slop with different treatments and bare slop are studied in the paper. The paper presented the impacts of different treatments on the productivity the slope with red soil. And The results indicated that land potential productivity under measure Ⅱ（ horizontal terraces of orchards with Bahia grass planted on the walls and mounds before but a ditch behind） was the highest, which was 300 times higher than that of bare slop. The results also revealed that water is not the limited parameter for land productivity in this region since the precipitation is enough for crop. The capacity to meet the crop needs of soil nutrients decreased with the increase of soil erosion, and available phosphorus is the key parameter for the crop growth.

关 键 词：红壤 不同措施 生产潜力 计算模型 

分 类 号：S155.25[农业科学—土壤学] S157.3[农业科学—农业基础科学]