当前位置: 首页 > 文章 > 中南地区可变电荷土壤的表面性质 华中农业大学学报 1991 (1) 36-44
Position: Home > Articles > THE SURFACE PROPERTIES OF SOILS WITH VARIABLE CHARGE IN CENTRAL AND SOUTHERN CHINA Journal of Huazhong Agricultural University 1991 (1) 36-44

中南地区可变电荷土壤的表面性质

作  者:
李学垣;徐凤琳;黄巧云;姚同山
单  位:
华中农业大学土化系
关键词:
可变电荷土壤;表面性质;阳离子交换量;比表面
摘  要:
本文就几年来对中南地区北纬19~32°,黄棕壤、红壤与砖红壤40多个土样的x—射线衍射和化学分析结果,讨论了这些土壤胶体的无机组成、矿物组成及其与土壤表面性质的关系. ①黄棕壤以水云母、蛭石和高岭为主,有的含有14埃过渡矿物;红壤以高岑或高岑、水云母为主,有少量14埃过渡矿物,有的含微量三水铝石;砖红壤中高岑石占绝对优势,含少量三水铝石.黄棕壤粘粒中游离铁含量比红壤、砖红壤的低,而无定形铁的含量则相反。②黄棕壤粘粒的比表面比红壤、砖红壤的高,前者以内表面为大,后者以外表面为大。黄棕壤的表面电荷点零比红壤、砖红壤的小,而它们的净电荷均为负号.③黄棕壤、红壤、砖红壤粘粒阳离子交换量,土壤的盐基饱和度依次变小。表明红壤、砖红壤的养分阳离子吸特量小,较缺乏有效钙、镁、钾等元素.④黄棕壤、红壤、砖红壤的△pH(pH_(H_2O-pH_(kcl))依次变小;红壤的土壤酸度主要是由交换性铝引起的.⑤黄棕壤吸附、固定磷酸离子的载体与红壤、砖红壤有所不同,影响其有效性的因素不一样,提高其有效性的途径宜有所不同.
译  名:
THE SURFACE PROPERTIES OF SOILS WITH VARIABLE CHARGE IN CENTRAL AND SOUTHERN CHINA
作  者:
Li Xueyuan Xu Fenglin Huang Qiaoyun Yao Tongshan (Dept. of Soils and Agrochemisiry, Huazhong Agricultural University, Wvhan 430070)
关键词:
soils with variable charge;;surface property;;CEC;;specific surface area
摘  要:
By using X-ray diffraction and chemical analysis of more than forty soil samples which belong to yellow brown soils, red soils and latosols from 19°to 32° north latitude in central and southern China, clay mineral association,chemical composition of soil colloid and surface properties of soils were studied. The results indicate that illite, vermiculite and kaolinite are the main clay minerals in yellow brown soils. The Principal mineral in the clay fraction of red soils and latosols is kaolinite. There is 14A intergrade mineral in red soils and some yellow brown soils. Red soils and latosols also contain small amount of gibbsite. The content of free iron oxides and the value of ZPC were found to be in the following order: yellow brown soilsred soils>latosols. In terms of the different carrier of phosphorus adsorption and fixation in the three typs of examined soils, the factors affecting phosphorus availability and methods for the enrichment of available phosphorus in these soils are different.

相似文章

计量
文章访问数: 4
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊