The Typical Hydroponic Anthrosols Soil Series Classified And The Research Of Organic Vertical Distribution Of Jianghan Plain

Soil Taxonomy is a basic work in soil science research, and the soil series is the most basic classification unit in Soil Taxonomy unit, soil series is the basic work to carry out soil survey、land use survey and soil mapping, and also is the foundation of managing soil、protecting soil resource、protecting ecology and environment and transferring of agriculture technology. As the main source of soil nutrients,soil organic matter can promote the soil structure’s development and formation、improve the soil physical properties,Study on the soil organic’s vertical distribution in different soil series can guide agriculture production better.This article make the Chinese Soil Taxonomy as the guidance, select a typical hydroponic anthrosols of JiangHan Plain,by surveying the climate、vegetation、topography、geomorphology and statues of land use and other factors, considering the distribution of different soil parent materia and soil type to set down the number and location of the section profile point, totally investigate forty main section profile in Dongxihu township of Wuhan City、Qianjiang City、Xiantao City、 Xianning township of Xianning City、Chibi county and Jiayu county、Hanchuan county of Xiaogan City、Honghu county of Jingzhou City,timely recording、sampling and complete the analysis of physical and chemical properties indoor.On the basis of advanced classfication unit of Chinese Soil Taxonomy, in accordance with the overall requirements of simple quantitative classification index, combining with soil profile morphological and soil physical and chemical properties, the technical route of soil classification was sum up, rules and steps were formulated corresponded by the station of the jianghan plain water tillage anthrosols,divided the40samples into29soil series,summarized as follows according to study the soil organic’s vertical distribution in different soil series.(1) Reference to the advanced units Chinese Soil Taxonomy (Revised Proposal), analysis the meteorology, texture, groundwater level data etc of the sampling point region and combine redox characteristics、gley characteristics, human stir characteristics of diagnostic features etc, Jianghan plain water tillage anthrosols were retrieved to seven sub-type, including3iron permeability gley water tillage soil,9ordinary gley water tillage soil,5bottom hidden iron permeable artificial soil,2ordinary iron permeable artificial soil,3bottom iron plow for soil water,5bottom hidden Jane rearing water tillage soil,2Plain Jane rearing water tillage soil(2) Based on simple, applicable and quantitative principles to select the pedon soil permutations and combinations, the thickness of the surface soil, surface soil texture, with or without special soil, special soil horizon level and the thickness and whether there is a new biological invader as the specific indicators of dividing soil series. By studying out the search order divided the original typical hydroponic anthrosols into29soil series of Jianghan Plain.(3) According to the analysis of organic matter content in soil series, organic matter content which changed along the profile was divided into4classes:organic matter content increased by degrees from top to bottom along the profile (2soil series), organic matter content decreased by degrees from top to bottom along the profile (3soil series), organic matter content first increased and after decreased by degrees from top to bottom along the profile (3soil series), organic matter content first decreased and after increased by degrees from top to bottom along the profile (21soil series). And these change rules appeared to correlate with soil PH, soil volume-weight and total nitrogen content of soil, and so on.