论文部分内容阅读
作者认为,以我国水稻土“三育”分类理论和阶段发育的观点为基础,同时吸收美国土壤系统分类的理论和经验,是建立我国水稻土定量分类系统的可取途径.把间歇存在的淹水水分状况作为确立水稻土为独立土纲的诊断特性;把淹育、渗育和潴育层作为亚纲的诊断土层.同一土类具有共同的氧化还原状况相近的温度状况和盐基状况以及剖面层序.亚类则是由于母质、地形、水文、时间的不同出现了偏离土类中心概念的续分单元.定量分类的关键是首先选择“三育”层和淹水水分状况作为特有的分级特性,其它诊断土层和特性为一般分级特性.根据各自的指标就可确定归属.最后拟出三个亚纲17个土类的中国水稻土分类系统.
The author believes that based on the theory of “three-breeding” and the stage development of paddy soil in our country, it is a desirable way to establish the quantitative classification system of paddy soil in China based on the theory and experience of assimilating soil system classification in the United States. Water status is used as a diagnostic attribute to establish paddy soil as an independent soil class, and the submerged, submerged and infiltrated layers are used as the diagnostic soil layer. The same soil has similar temperature conditions and salt base conditions with similar redox conditions and Section sequence.The subclass is due to the difference of parent material, topography, hydrology, and time, and the key element of deviating from the concept of soil center has emerged.The key to quantitative classification is to select the “three layers” and the status of flooding water as the unique Grading characteristics, and other diagnostic soil layers and characteristics of the general grading characteristics.According to their own indicators can be determined attribution.Finally, three Chinese subsoil soil classification system of 17 paddy soil.