黎塘岩溶区铁锰结核背景下的土壤研究  

Study on Soil of Fe-Mn Nodules Background in Litang Karst

作　　者：苏春田[1] 唐健生[1] 单海平[1] 陈宏峰[1] 夏日元[1] 邹胜章[1] 陈忠将[1] 

机构地区：[1]中国地质科学院岩溶地质研究所

出　　处：《江西农业学报》2008年第4期50-53,56,共5页Acta Agriculturae Jiangxi

基　　金：广西科学基金资助项目(桂科基0639066);广西岩溶区水资源有效利用研究与示范项目(2002BA901A13);中国地质调查项目(1212010634803)

摘　　要：对黎塘岩溶区铁锰结核背景下的土壤进行了分析。结果表明:研究区土壤以硅质土为主,土壤发育呈幼年性。土壤多呈中性,对土壤肥力的发挥及旱地作物的生长较为有利;有机质含量A层多为中等(Ⅲ级)或丰富(Ⅳ级),B层为缺乏(Ⅱ级);全N含量A层多为中等(Ⅲ级),B层多为缺乏(Ⅱ级),有效N含量A层多为丰富(Ⅳ级)或甚丰富(Ⅴ级),B层多为中等(Ⅲ级)或缺乏(Ⅱ级),A、B层养分含量的差异说明农耕区土壤受表层耕作、施肥影响较为显著。土壤有效P整体表现为缺乏或甚缺乏,可能已成为旱地作物生长的主要限制因子,阳离子交换量多表现为保肥力中等。SOil of Fe - Mn nodules background in Litang karst was analyzed. The results showed that ： the soil was mainly siliceous and juvenile; soil was mainly neutral and was beneficial for dryland crops; organic matter content in A layer was mostly middle （Ⅲ grade） or rich （Ⅳ grade）, while that in B layer was lack （Ⅱ grade） ; the total N content in A layer was mostly middle （Ⅲ grade）, while that in B layer was lack （Ⅱ grade） ; the effective N content in A layer was mostly rich （ Ⅳ grade） or even rich （ Ⅴ grade）, while that in B layer was mostly middle （Ⅲ grade） or lack（Ⅱ grade）. The nutrient difference between A layer and B layer indicated that surface farming and fertilization played important role. Effective P in the soil was overall lack and may have become the major limiting factor for growth. CEC was mostly middle for fertility capacity.

关 键 词：岩溶区 铁锰结核 土壤肥力 土壤性质 

分 类 号：S153.61[农业科学—土壤学]