Effects of forest regeneration practices on the flux of soil CO2 after clear-cutting in subtropical China

被引：20
|
作者：
Wang, Yixiang [1 ]
Zhu, Xudan [1 ]
Bai, Shangbin [1 ]
Zhu, Tingting [1 ]
Qiu, Wanting [1 ]
You, Yujie [1 ]
Wu, Minjuan [1 ]
Berninger, Frank [1 ,2 ]
Sun, Zhibin [3 ]
Zhang, Hui [1 ]
Zhang, Xiaohong [4 ]
机构：
[1] Zhejiang A&F Univ, Sch Environm & Resources Sci, Key Lab Carbon Cycling Forest Ecosyst & Carbon Se, State Key Lab Subtrop Silviculture, Linan 311300, Zhejiang, Peoples R China
[2] Univ Helsinki, Dept Forest Sci, POB 27, FIN-00014 Helsinki, Finland
[3] Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523 USA
[4] Chinese Acad Forestry, Res Inst Forest Resource Informat Tech, Beijing 100091, Peoples R China
来源：
JOURNAL OF ENVIRONMENTAL MANAGEMENT | 2018年 / 212卷
基金：
中国国家自然科学基金;
关键词：
Soil CO2 flux; Clear-cutting; Reforestation; Soil-atmosphere exchange; Subtropical forest; SITE PREPARATION TREATMENTS; SLASH PINE PLANTATIONS; TROPICAL RAIN-FOREST; CARBON-DIOXIDE; N2O FLUX; SEASONAL PATTERNS; GAS FLUXES; RESPIRATION; EFFLUX; CH4;
D O I：
10.1016/j.jenvman.2018.02.038
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Reforestation after clear-cutting is used to facilitate rapid establishment of new stands. However, reforestation may cause additional soil disturbance by affecting soil temperature and moisture, thus potentially influencing soil respiration. Our aim was to compare the effects of different reforestation methods on soil CO2 flux after clear-cutting in a Chinese fir plantation in subtropical China: uncut (UC), clear-cut followed by coppicing regeneration without soil preparation (CC), clear-cut followed by coppicing regeneration and reforestation with soil preparation, tending in pits and replanting (CCRP), and clear-cut followed by coppicing regeneration and reforestation with overall soil preparation, tending and replanting (CCRO). Clear-cutting significantly increased the mean soil temperature and decreased the mean soil moisture. Compared to UC, CO2 fluxes were 19.19, 37.49 and 55.93 mg m(-2) h(-1) higher in CC, CCRP and CCRO, respectively (P<0.05). Differences in CO2 fluxes were mainly attributed to changes in soil temperature, litter mass and the mixing of organic matter with mineral soil. The results suggest that, when compared to coppicing regeneration, reforestation practices result in additional CO2 released, and that regarding the CO2 emissions, soil preparation and tending in pits is a better choice than overall soil preparation and tending. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：332 / 339
页数：8
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