南方农业学报2012，Vol.43Issue(5)：630-633,4.DOI:10.3969/j:issn.2095-1191.2012.05.630
南宁市郊不同类型土壤腐殖质垂直分布特征研究
Vertical distribution characteristics of different types of soil humus in Nanning suburb
摘要
Abstract
[Objective]Vertieal distribution characteristics of different types of soil humus were analyzed to disclose the distribution characteristics of soil organic C, humus C and their correlations with soil moisture content and pH. [Method]Combining field sampling with laboratory analysis, correlation analysis was conducted on organic carbon content and humus components in 0-80 cm soil collected from paddy field and vegetable garden in Nanning suburb. [Result]Soil humus carbon content showed descending trend with the increase of soil depth. On the whole, organic carbon content of vegetable garden soil was higher than that of paddy soil. For vegetable garden soil, organic carbon content gradually decreased from 16.16 (0-10 cm soil) to 5.32 g/kg (70-80 cm soil); for paddy soil, organic carbon content gradually decreased from 12.37 (0-10 cm soil) to 4.19 g/kg (70-80 cm soil). Total carbon content of humic acid (HA) and fulvic acid (FA) in the two types of soil both showed descending trend with the increase of soil depth. HA/FA value in vegetable garden soil was higher than that in paddy soil. For two types of soil, total carbon content in humus showed extremely significantly positively correlated with fulvic acid, and significantly positively correlated with humic acid and humin, while extremely significantly and negatively correlated with pH, water content and HA/FA value. For vegetable garden soil, total carbon content in humus was extremely significantly and positively correlated with fulvic acid and humin, while significantly and negatively correlated with pH, moisture content and HA/FA value. [Conclusion]Humification degree of vegetable garden soil was relatively higher. Total carbon contents in humus of the two types of soil in Nanning suburb were positively correlated with fulvic acid, humic acid and humin, while were negatively correlated with pH, water content and HA/FA value.关键词
水稻土/菜园土/腐殖质碳/剖面分布特征/南宁市郊Key words
paddy soil/ vegetable garden soil/ humus carbon/ profile distribution characteristics/ Nanning suburb分类
农业科技引用本文复制引用
罗应刚,林清,王观远,李孙桂,曾洋..南宁市郊不同类型土壤腐殖质垂直分布特征研究[J].南方农业学报,2012,43(5):630-633,4.基金项目
广西研究生教育创新计划支撑项目(2011106030703M04) （2011106030703M04）
