首页 | 本学科首页   官方微博 | 高级检索  
     检索      

较贫瘠的红壤中有机质的积累及其生态意义
作者姓名:LI Zhong-Pei  CHENG Li-Li  LIN Xin-Xiong
作者单位:Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008 China  
基金项目:*1Project supported by the National Natural Science Foundation of China (No.39899370-3) and the Key Project of the Ninth Five-Year Plan (No.96-004-03-12).
摘    要:Field experiments on the decomposition of organic materials and the accumulation of organic carbon in infertile red soils were conducted at the Ecological Experimental Station of Red Soil, the Chinese Academy of Sciences, and the potential of CO2 sequestration by reclamation and improving the fertility of these soils was estimated. Results showed that in infertile red soils, the humification coefficients of organic materials were rather high, ranging from 0.28 to 0.63 with an average of 0.43, which was 41% higher than those in corresponding red soils with medium fertility. This was mainly attributed to the high clay content, high acidity and low native organic matter content of infertile red soils. Compared to those in corresponding normal red soils, the decomposition rates of organic materials were significantly lower in infertile red soils in the first 2 years, thereafter no significant difference was observed between those in the two kinds of soils. Depending on the kind and amount of organic manure applied, the soil properties and the rotation systems, annual application of organic manure with a rate of 4 500 to 9 000 kg ha-1 increased the organic carbon content in surface 20 cm of infertile red soils by 2.1~7.5 g kg-1 with an average of 4.7 g kg-1 within the first 5 years. The organic carbon content in infertile red soils which received organic manure annually increased linearly in the first 10 years, thereafter it slowed down, implying that the fertility of the infertile red soils could reach middle or high level in 10 years if the soil was managed properly. It was estimated that through exploitation of wastelands, re-establishment of fuel forests and improvement of soil fertility, soils in red soil region of China could sequester an extra 1.50 × 1015 g of atmospheric CO2.

关 键 词:红壤  有机碳  有机物  生态价值  大气  二氧化碳

Accumulation of organic matter in infertile red soils and its ecological importance
LI Zhong-Pei,CHENG Li-Li,LIN Xin-Xiong.Accumulation of organic matter in infertile red soils and its ecological importance[J].Pedosphere,2000,10(2):149-158.
Authors:LI Zhong-Pei  CHENG Li-Li and LIN Xin-Xiong
Institution:Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008 (China);Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008 (China);Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008 (China)
Abstract:Field experiments on the decomposition of organic materials and the accumulation of organic carbon in infertile red soils were conducted at the Ecological Experimental Station of Red Soil, the Chinese Academy of Sciences, and the potential of CO2 sequestration by reclamation and improving the fertility of these soils was estimated. Results showed that in infertile red soils, the humification coefficients of organic materials were rather high, ranging from 0.28 to 0.63 with an average of 0.43, which was 41% higher than those in corresponding red soils with medium fertility. This was mainly attributed to the high clay content, high acidity and low native organic matter content of infertile red soils. Compared to those in corresponding normal red soils, the decomposition rates of organic materials were significantly lower in infertile red soils in the first 2 years, thereafter no significant difference was observed between those in the two kinds of soils. Depending on the kind and amount of organic manure applied, the soil properties and the rotation systems, annual application of organic manure with a rate of 4 500 to 9 000 kg ha-1 increased the organic carbon content in surface 20 cm of infertile red soils by 2.1~7.5 g kg-1 with an average of 4.7 g kg-1 within the first 5 years. The organic carbon content in infertile red soils which received organic manure annually increased linearly in the first 10 years, thereafter it slowed down, implying that the fertility of the infertile red soils could reach middle or high level in 10 years if the soil was managed properly. It was estimated that through exploitation of wastelands, re-establishment of fuel forests and improvement of soil fertility, soils in red soil region of China could sequester an extra 1.50×1015 g of atmospheric CO2.
Keywords:accumulation  ecological importance  infertile red soils  organic carbon
本文献已被 万方数据 等数据库收录!
点击此处可从《土壤圈》浏览原始摘要信息
点击此处可从《土壤圈》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号