Changes of soil CO2 flux under different stocking rates during spring-thaw period in a northern desert steppe, China
Changes of soil CO2 flux under different stocking rates during spring-thaw period in a northern desert steppe, China
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北方荒漠草原春融期不同放养量下土壤CO2通量变化
DOI：
10.1016/j.atmosenv.2015.09.073
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发表时间：
2015-12
影响因子：
5
通讯作者：
Chengjie Wang
中科院分区：
文献类型：
--
作者：
Shiming Tang;Yujuan Zhang;Yupin Guo;Xiajie Zhai;Andreas Wilkes;Guodong Han;Yuanyuan Jiang;Kesi Liu;Pei Zhou;Kun Wang;Chengjie Wang
大气中的二氧化碳（CO2）在地球大气的辐射平衡中起着重要的作用。大多数研究主要集中在生长季节。然而，关于内蒙古荒漠草原生态系统春融期CO2排放的研究报道较少。为探讨荒漠草原土壤-大气CO2交换对不同放牧率的响应，在冬春过渡期进行了研究。试验于2010 - 2011年春融期在内蒙古荒漠草原设置不放牧（UG）、轻度放牧（LG）、中度放牧（MG）和重度放牧（HG）4个处理，每个处理重复3次。利用Picarro G1301光腔衰荡分光光度计对12个放牧区土壤CO2通量进行了测定。我们的研究结果表明，在春季解冻期间的平均CO2排放量为8.23 mg CO2-C m− 2 h −1。在春季解冻期间，两年的平均CO2通量分别为10.59 mg CO2-C m− 2 h −1（UG）、8.10 mg CO2-C m− 2 h −1（LG）、7.89 mg CO2-C m− 2 h −1（MG）和6.35 mg CO2-C m− 2 h −1（HG）。在春季解冻期间（3月至4月），两年的平均累积CO2排放量为118.51 kg C ha− 1。在这项研究中，放牧措施显着减少春季解冻期在荒漠草原的CO2排放量。我们的研究结果是根据其他研究结果表明，CO2排放量显着调节土壤温度在该地区春季解冻期。这些显著的经验关系为估算荒漠草原春融期区域CO2排放量提供了一种简单的方法。
Atmospheric carbon dioxide (CO2) plays an important role in the radiative balance of the earth's atmosphere. Most studies have primarily focused on the growing season. However, few reports are available on CO2emissions in the Inner Mongolian desert steppe ecosystem during the spring thaw period. To assess the responses of soil-atmosphere CO2exchange to different stocking rates in the desert steppe, we conducted this study during the winter–spring transition period. The experiment was conducted with four treatments defined along a grazing gradient of un-grazing (UG), light grazing (LG), moderate grazing (MG) and heavy grazing (HG) with three replications of each treatment in the desert steppe of Inner Mongolia during the spring thaw period in 2010 and 2011. Soil CO2fluxes were measured using Picarro G1301 (an automatic cavity ring-down spectrophotometer) in twelve grazing areas. Our results indicate that mean CO2emission during the spring thaw period was 8.23 mg CO2–C m−2h−1. Average CO2fluxes over the two years during the spring thaw period were 10.59 mg CO2–C m−2h−1(UG), 8.10 mg CO2–C m−2h−1(LG), 7.89 mg CO2–C m−2h−1(MG) and 6.35 mg CO2–C m−2h−1(HG). Cumulative CO2emission amounted to 118.51 kg C ha−1during the spring thaw period (March–April) on average over two years. In this study, grazing practice significantly reduced CO2emission during the spring thaw period in the desert steppe. Our results are in accordance with other findings suggesting that emissions of CO2are regulated significantly by soil temperature during the spring thaw period in this area. The significant empirical relationships provide a simple way to estimate regional amounts of CO2emission from desert steppe during the spring thaw period.
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影响因子：
4.8
作者：
Larsen, KS;Jonasson, S;Michelsen, A
通讯作者：
Michelsen, A
DOI：
--
发表时间：
2011
期刊：
Journal of Inner Mongolia Agricultural University
影响因子：
--
作者：
Tang Shi-ming
通讯作者：
Tang Shi-ming
影响因子：
5
作者：
C. Song;Yuesi Wang;Yiyon Wang;Zhi-chun Zhao
通讯作者：
C. Song;Yuesi Wang;Yiyon Wang;Zhi-chun Zhao
影响因子：
8.7
作者：
Zhi-Ping Wang;Xingguo Han;Linghao Li
通讯作者：
Zhi-Ping Wang;Xingguo Han;Linghao Li
影响因子：
5.2
作者：
K. Wickland;R. Striegl;M. Mast;D. Clow
通讯作者：
K. Wickland;R. Striegl;M. Mast;D. Clow