鄂南丘陵区棕红壤硼的分布和迁移特点及其调控  

DISTRIBUTION， REMOVING AND REGULATION OF BORON IN BROWN-RED SOIL IN THE HILLY REGION OF SOUTH HUBEI PROVINCE

作　　者：曹凑贵[1] 张光远[2] 王运华[2] 蔡崇法[2] 

机构地区：[1]华中农业大学农学系,武汉430070 [2]华中农业大学资源环境与农业化学系

出　　处：《土壤学报》2001年第1期96-103,共8页Acta Pedologica Sinica

基　　金：国家"九五"攻关课题!"鄂南棕红壤丘陵区综合治理和持续发展试验区"(960040307)资助

摘　　要：针对鄂南丘陵棕红壤区农业持续发展中作物需硼问题，以集水面为单位和室内盆栽、人工模拟降雨试验相结合的方法，系统地研究了鄂南丘陵棕红壤区土壤硼的含量分布、形态和周年变化、动态规律及不同土地利用方式、耕作制度下土壤硼的迁移平衡规律，在此基础上建立了土壤硼循环的综合模拟模型。研究结果表明，同一集水面不同高程农田硼的分布、迁移和循环规律有一定差异；各形态硼的变化周期较为一致。热水溶性硼在集水面土壤中有明显的表层富集现象，在不同地形部位其系数有所不同。硼的表层流失以土壤体内向下淋失，受作物叶面积指数和土壤稳渗速率影响较大。To aim directly at problem of crop demanding boron in sustainable agriculture development of brown-red soil in the hilly region of south Hubei Province, the content,forms, distribution, annual change, runoff, leaching and balance of the boron were analyzed. On the base of the synthetic analysis, the simulation model of boron cycling was set up. The results showed that distribution, removing and cycling of boron in different type farmland were different in the typical catchment, the period of annual change of majority form boron is six months, the surface assembled of HWSB is obvious, but the vertical transfer coefficient of HWSB was different in different type farmlands, boron loss of runoff and leaching were affected by leaves area index and stable leaching ratio principally.

关 键 词：鄂南丘陵 棕红壤 硼分布 平衡规律 硼迁移 

分 类 号：S153.61[农业科学—土壤学] S155.25[农业科学—农业基础科学]