摘要
为了探究南通市土壤阳离子交换量变化特征及影响因素,通过野外采集南通地区土壤样品,室内分析pH、有机质、阳离子交换量(cation exchange capacity, CEC)、机械组成分布特征及相关性。结果表明:南通土壤pH>6.89,碱性为主;有机质含量介于1.22%~3.70%,CEC值介于2.71~13.9 cmol/kg,土壤肥力较弱;机械组成以粉砂粒为主,肥力易流失。进一步探究阳离子交换量、有机质、机械组成的变化关系,结果表明土壤有机质含量、粉粒及黏粒含量与阳离子交换量呈现较为明显的正相关,相关系数R分别为0.84、0.58、0.70,土壤的砂粒含量则与阳离子交换量呈现负相关,相关系数R=0.65。土壤有机质、粉粒、粘粒含量的增加均可显著提高阳离子交换量值,相较而言,通过改善有机质来增加土壤阳离子交换量最为容易获得。因此,对于土壤肥力中等的南通地区,可以通过施加有机质肥来改善土壤质地,增加土壤肥力。
To explore the variation characteristics and influencing factors of soil cation exchange capacity in Nantong,soil samples were collected in the field,and pH,organic matter,cation exchange capacity(CEC),mechanical composition distribution characteristics and correlation were analyzed in the laboratory.The results showed that the pH value of soil in Nantong was more than 6.89,and the soil was mainly alkaline.The soil fertility was weak with organic matter content ranging from 1.22%to 3.70%and CEC value ranging from 2.71 cmol/kg to 13.9 cmol/kg.Mechanical composition was mainly powder sand,fertility was easily lost.To further explore the cation exchange capacity,organic matter,and the changes of mechanical composition results showed that the soil organic matter content,silt and clay content and cation exchange capacity appear relatively obvious positive correlation,the correlation coefficient R were 0.84,0.58,0.70,the sand content of the soil is negatively related to the rendering of cation exchange capacity,correlation coefficient R was 0.65.The increase of soil organic matter,silt and clay content could significantly increase the value of cation exchange.Comparatively,the improvement of soil organic matter is the easiest way to increase soil cation exchange capacity.Therefore,in Nantong area with moderate soil fertility,organic fertilizer can be applied to improve soil texture and increase soil fertility.
作者
杨树俊
韩张雄
王思远
端爱玲
孙东年
李敏
YANG Shu-jun;HAN Zhang-xiong;WANG Si-yuan;DUAN Ai-ling;SUN Dong-nian;LI Min(Geo-engineering Investigation Institute of Jiangsu Province,Nanjing 210012,China)
出处
《科学技术与工程》
北大核心
2023年第7期2799-2805,共7页
Science Technology and Engineering
基金
江苏省地质工程勘察院科研基金(2022-01)
国家质量基础的共性技术研究与应用项目(2017YFF0206804)。
关键词
阳离子交换量
有机质
机械组成
相关性
南通
cation exchange capacity
organic matter
mechanical composition
correlation
Nantong
作者简介
第一作者:杨树俊(1992-),男,汉族,江苏泰州人,硕士,工程师。研究方向:土壤化学及检测。E-mail:sjyang92@163.com;通信作者:韩张雄(1982-),男,汉族,陕西榆林人,博士,高级工程师。研究方向:土壤化学及检测。E-mail:han10260@126.com。
