Components of soil respiration and its monthly dynamics in rubber plantation ecosystems

文献类型： 外文期刊

第一作者： Wu, Zhixiang

作者： Wu, Zhixiang;Xie, Guishui;Zhou, Zhaode;Wu, Zhixiang;Guan, Limin;Chen, Bangqian;Yang, Chuan;Lan, Guoyu;Xie, Guishui

作者机构：

关键词： rubber plantations;stand age;soil respiration;components;effect factors

期刊名称：2013 FOURTH INTERNATIONAL CONFERENCE ON DIGITAL MANUFACTURING AND AUTOMATION (ICDMA)

ISSN： 2162-0571

年卷期： 2013 年

页码：

收录情况： SCI

摘要： Our objective was to quantify four components and study effect factors of soil respiration in rubber plantation ecosystems. Providing the basic data support for the establishment of the trade of rubber plantation ecosystem carbon source/sink. We used Li-6400 (IRGA, Li-COR) to quantitate four components of soil respiration in rubber plantation ecosystems at different ages. Soil respiration can be separated as four components: heterotrophic respiration (Rh), respiration of roots (Rr), respiration of litter layer (RI) and respiration of mineral soil (Rm). The soil respiration rate (Rs) showed significant seasonal variation. The maximum soil respiration rate of the whole year appeared in August, and the minimum in November or December. The components of soil respiration rate order showed as: heterotrophic respiration > respiration of roots > respiration of litter layer > respiration of mineral soil. The soil respiration rate was highly significant correlation (p<0.01, Q10=1.13 similar to 2.37) with 0 similar to 10 cm soil temperature in dry season, and significant correlation (p<0.05, Q10=1.10 similar to 1.77) with 0 similar to 10cm soil temperature in wet season. And soil respiration rate was not significant correlation with soil water content of 5 cm (p >= 0.05). The soil respiration components of four kinds forest ages accounted for the percentage contribution to the flux of annual carbon emissions (Rs) as: Rh: 35.28 similar to 52.75%, Rr: 21.73 similar to 39.97%, RI: 17.13 similar to 19.63%, Km: 6.605 similar to 10.27%%, respectively. The soil respiration rate carbon flux of 5a, 10a, 19a and 33a respectively were 10.03, 10.34, 11.96 and 11.09 t.hm-2.a-1. And the annual carbon flux of soil respiration increased with stand ages increasing in rubber plantation ecosystems

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