川中丘陵区土壤养分含量及其与易氧化有机碳的关系  

The Content of Soil Nutrient in the Middle of Hilly Region of Sichuan Basin and Their Relationships with Soil Readily Oxidation Carbon

作　　者：苟曦[1,2] 邓良基[1,2] 何鹏[1,2] 任秋容[1,2] 

机构地区：[1]四川农业大学资源环境学院 [2]四川省土地信息重点实验室,四川雅安625014

出　　处：《山地学报》2006年第B10期103-109,共7页Mountain Research

基　　金：四川省教育厅自然科学重点项目资助（2003A009）.

摘　　要：以川中丘陵区的典型紫色土为主要研究对象，对丘陵区不同成土母质的土壤养分含量特点及其与土壤易氧化有机碳的相互关系分析。结果表明：研究区内土壤有机碳平均含量8．10g／kg，属中等水平，主要集中在4．00-15．00g／kg。土壤易氧化有机碳的含量在0．65～3．98g／kg。全氮含量在0．185～1．074g／kg，平均值为0．413g／kg，含量偏低。且三者不同成土母质的含量规律均为：遂宁组〉蓬莱镇组〉自流井组〉沙溪庙组；土壤全磷含量总体在0．26—3．04g／kg，不同母质的含量与前面三者的分布既相似又存在局部差异性：遂宁组〉蓬莱镇组〉沙溪庙组〉自流井组；土壤有效氮含量总体在15．6—68．3mg／kg，其含量与土壤全氮略有不同：蓬莱镇组〉沙溪庙组〉遂宁组〉自流井组；土壤有效磷的含量在3．0—15．4mg／kg：遂宁组〉自流井组〉蓬莱镇组〉沙溪庙组。对于川中丘陵区土壤有机碳（SOC）、全氮（TN）、有效氮（AN）、全磷（TP）、有效磷（AP）与易氧化有机碳（ROC）之间的关系分析，得出5个一元线性回归方程。由相关系数可知易氧化有机碳对土壤碳、氮、磷作用强度的顺序依次为：土壤有机碳、土壤全氮、土壤有效氮、土壤有效磷、土壤全磷。The carbon cycle is central to the global ecosystem, being recognized as an important component of agricultural sustainable development. The middle of Sichuan hilly areas was the important procreative area of grain and rap oil in China. But in this area, the landform was many crumb in soil parent material, additionally it had affected by human disturbance, those instance resulted in many problems such as the drop of soil fertility, the decline of agricultural production, the worsen of environment quality and so on. There was a very important relation between the content of soil nutrient and soil readily oxidation carbon. This article regarded areas of hills in the middle part of the Sichuan Basin as studied area; Soil sampling accorded to the four parent materials of purple soil , namely J1-2z, J2s, J3s and J3p. Combining the actual geography, the slope of hillock was divided into three parts： peak slope, middle slope and foot slope. The content of soil nutrient in the middle of hilly region of Sichuan basin and their relationships with soil readily oxidation carbon were studied. The study result indicated that soil from different soil parent materials, soil organic matter, soil readily oxidation carbon, soil total nitrogen, soil total phosphorus, soil available phosphorus were highest in J3s;In differently, the content of soil available nitrogen was J3p 〉 J2s 〉 J3s 〉 J1-2z. The average content of soil organic matter is 8.10 g/kg, belonging to middle level. As to the soil nutrient, the average content of soil total nitrogen （0.26 - 3.04 g/kg） was low. The regression equations of soil organic matter（ SOM）, soil total nitrogen（ STN）, soil available nitrogen（ SAN）, soil total phosphorus （ STP）, soil available phosphorus （SAP） with soil readily oxidation carbon （ROC） were also developed. They are as follows： SOC =4.3644ROC ＋ 1. 1274R =0.888STN=0. 1846ROC ＋0. 1128R =0.859 SAN = 13. 337ROC ＋ 11. 517R =0.742STP = -0. 2709ROC ＋2.0123R =0.223 SAP = -1. 1879ROC ＋ 8.

关 键 词：土壤养分 易氧化有机碳 成土母质 紫色土 回归分析 

分 类 号：S158.2[农业科学—土壤学]