| 黑河中游山前平原区退耕地土壤有机碳库特征 |
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| 引用本文： | 常宗强,裴雯,冯起,苏永红.黑河中游山前平原区退耕地土壤有机碳库特征[J].山地学报,2011,29(1). |
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| 作者姓名： | 常宗强 裴雯 冯起 苏永红 |
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| 作者单位： | 1. 中国科学院寒区旱区环境与工程研究所生态水文与流域科学重点实验室,甘肃兰州,730000
2. 甘肃省祁连山国家级自然保护区管理局,甘肃张掖,734000 |
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| 基金项目： | 国家自然科学基金(40801001,40701054)项目资助~~ |
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| 摘 要： | 采用野外调查测定、野外定位研究和室内分析相结合的方法,在黑河中游山前平原区选择邻近相同海拔和土壤类型的退耕(退耕1 a、5 a、10 a)造林地为研究对象,研究了山前平原区退耕地不同退耕年限的土壤碳动态,结果表明:退耕1 a、退耕5 a、退耕10 a和退耕造林地的土壤有机碳含量变化分别为16.89 gC/kg,8.24 gC/kg,8.56gC/kg和9.98 gC/kg,平均土壤有机碳密度分别为8.05 kg/m2,4.78 kg/m2,5.02 kg/m2和6.52 kg/m2。平均土壤有机碳周转时间分别为23 a,25 a,26 a和33 a;不同植被类型土壤CO2通量依次为退耕1 a土壤530.8 gC/(m2.a);退耕5 a土壤316.9 gC/(m2.a);退耕10 a土壤266.1 gC/(m2.a);退耕地造林(杨树林)286.9 gC/(m2.a)。同一类型退耕地中,土壤有机碳含量和土壤碳密度随土壤深度增加而降低,而土壤有机碳周转时间则随深度增加而增大。
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| 关 键 词： | 土壤有机碳 土壤CO_2通量 周转时间 退耕地 |
Soil Organic Carbon Character to Vegetations Changing from Abandoned Farmlands in Plain before Mountain in Middle Part of Heihe River |
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| CHANG Zongqiang,PEI Wen,FENG Qi,SU Yonghong.Soil Organic Carbon Character to Vegetations Changing from Abandoned Farmlands in Plain before Mountain in Middle Part of Heihe River[J].Journal of Mountain Research,2011,29(1). |
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| Authors: | CHANG Zongqiang PEI Wen FENG Qi SU Yonghong |
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| Institution: | CHANG Zongqiang1,PEI Wen2,FENG Qi1,SU Yonghong1 (1.Laboratory of Watershed Hydrology and Ecology of Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China,2.Management Bureau of Natural Reserve Region of Qilian Mountains,Zhangye 734000,China) |
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| Abstract: | The paired plots with the same elevation and the soil type of the abandoned farmland(1 year after restored,5 years after restored and 10 years after restored of the abandoned farmland) were selected as study objects in plain before mountain in middle part of Heihe River,Zhangye of Gansu,northwestern China.Based on the field survey,field orientation study and laboratory analyze and by means of comparison of difference of storage of organic carbon among different years after restored.The result indicate that ... |
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| Keywords: | soil organic carbon soil surface CO_2 flux turnover time abandoned farmland |
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