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不同类型农田土壤对可溶性有机氮、碳的吸附特性

Adsorption characteristics of soluble organic carbon and nitrogen in two cultivated soils

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【作者】 赵满兴周建斌陈竹君郑险峰

【Author】 ZHAO Man-xing1,3,ZHOU Jian-bin1,2,CHEN Zhu-jun1,ZHENG Xian-feng1(1College of Resource & Environment Sciences,Northwest A & F University,Yangling 712100,Shaanxi,China;2Key Laboratory of Plant Nutrition and Nutrient Cycling of Agriculture Ministry,Beijing 100081,China;3College of Life Science,Yan’an University,Yan’an 716000,Shaanxi,China)

【机构】 西北农林科技大学资源环境学院西北农林科技大学资源环境学院 陕西杨凌712100延安大学生命科学学院陕西延安716000陕西杨凌712100农业部植物营养与养分循环重点实验室北京100081陕西杨凌712100

【摘要】 研究了陕西关中地区红油土和淋溶褐土耕层土壤对分离的有机肥提取液中可溶性有机氮、碳(SON和SOC)的吸附特性.结果表明:原始物质吸附等温线方程可以反映土壤对可溶性有机氮、碳的吸附特性,土壤吸附SON、SOC的数量与它们各自加入的量呈极显著线性关系.从原始物质吸附等温线方程的分配系数m看,淋溶褐土对SON、SOC的吸附能力强于红油土.红油土对SON、SOC的平均吸附率分别为24.3%和18.8%,淋溶褐土则分别为38.3%和18.6%;两种类型土壤对SON和SOC的吸附能力较低,说明它们在土壤中具有较强的移动性;土壤对SOC的吸附能力弱于SON,说明SOC更易于从土壤中流失.

【Abstract】 In this paper,soluble organic carbon(SOC)and nitrogen(SON)were extracted from manure,and their adsorption characteristics in Argosols and Anthrosols in Guanzhong region of Shaanxi Province were investigated.The results showed that the adsorption of SON and SOC in the two soils could be fitted by initial mass isotherm model,and the adsorbed amounts of SON and SOC had a significant linear relationship with the initial concentrations of SON and SOC added into soils.The partition coefficient,m of the initial mass isotherm model,indicated that Argosols had a higher adsorbility than Anthrosols.The average adsorption rates of SON and SOC in Anthrosols were 24.3% and 18.8%,and those in Argosols were 38.3% and 18.6%,respectively.The low adsorption rates of SON and SOC indicated their high mobility in the two soils,and more SON was adsorbed than SOC suggested the higher potential of SOC leaching from soil.

【基金】 国家自然科学基金项目(30370288,40571087,40773057);西北农林科技大学拔尖人才支持计划资助项目(2006).
  • 【文献出处】 应用生态学报 ,Chinese Journal of Applied Ecology , 编辑部邮箱 ,2008年01期
  • 【分类号】S158
  • 【被引频次】45
  • 【下载频次】870
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