文摘
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调查草毡寒冻雏形土生物量及土壤有机质,利用涡度相关技术观测该区域作用层与大气CO2通量.结果表明:地下90%生物量集中于0~10 cm的表土层,年总净初级生产量约935.0 g/m2;土壤有机质含量在6.401~7.060%之间;净CO2通量呈明显的日变化和季节变化规律;5月中旬到9月底为CO2的净吸收(780 g CO2/m2),其中以7月最高,净吸收量明显高于非生长季的,10月到翌年5月初CO2的净排放量(383 g CO2/m2);全年固定碳高达397 g/m2. |
其他语种文摘
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In Mat-Cryic Cambisols region, biomass of growing plants and soil organic matter (SOM) were invesgated, and eddy covariance of CO2 flux between vagetation and atmosphere was observed. The results suggested that 1) more than 90% of the underground biomass was concentrated in the soil layer of 0- 10 cm, annual net primary production was about 935.0 g/m^2; the content of SOM was ranged from 6. 401% to 7. 060%. 2) There was significant daily and seasonal variation in CO2 flux of alpine meadow ecosystem. As for seasonal dynamic, it is net CO2 influx (780 g CO2/m^2) from middle May to end of September, and monthly peak is July; net CO2 influx volume exceed net CO2 efflux (383 g CO2/m^2) from first October to May. Annual net CO2flux is 397 g/m^2. |
来源
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草地学报
,2006,14(2):165-169 【扩展库】
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关键词
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草毡寒冻雏形土
;
草毡表层
;
有机质
;
生物量
;
净初级生产力
;
CO2通量
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地址
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1.
中国科学院西北高原生物研究所, 青海, 西宁, 810001
2.
日本国立环境研究所, 日本
3.
日本农业环境技术研究所
4.
中国科学院地理科学与资源研究所, 北京, 100101
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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1007-0435 |
学科
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畜牧、动物医学、狩猎、蚕、蜂 |
基金
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中国科学院知识创新工程重大项目
;
国家973计划
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文献收藏号
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CSCD:2427382
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