Acceleration of soil N2O flux and nitrogen transformation during tropical secondary forest succession after slash-and-burn agriculture
Acceleration of soil N2O flux and nitrogen transformation during tropical secondary forest succession after slash-and-burn agriculture
复制标题
刀耕火种农业后热带次生林演替过程中土壤 N2O 通量和氮转化的加速
DOI：
10.1016/j.still.2020.104868
复制
发表时间：
2021-04
影响因子：
6.5
通讯作者：
Minkun Chen
中科院分区：
文献类型：
--
作者：
Shaojun Wang （王邵军）;Qianqian Zuo;Qianqian Zuo;Ping Wang;Bo Yang;Shuang Zhao;Run Cao;Minkun Chen
土壤一氧化二氮 (N2O) 通量对热带森林发展的反应尚未得到充分记录。我们将中国云南西双版纳刀耕火种农业后热带次生林演替过程中的 N2O 通量特征与群落组成、氮循环、无机氮 (N) 库以及其他土壤变量联系起来。在演替过程中，从野桐到蒲桃群落，N2O 排放量从 390.8 ug N m−2h−1 增加到 671.6 ug N m−2h−1，其中最大值出现在雨季。森林演替后土壤含水量的增加解释了 71-90% 的 N2O 排放，而土壤温度的下降仅贡献了 66-70% 的排放。净氮矿化和硝化作用随着热带森林的次生演替而增加，与无机氮库的变化呈正非线性相关。 N2O通量的变化与净氮矿化和硝化、氨氮和硝态氮以及微生物生物量呈正相关，但与土壤容重以及凋落物和土壤的C:N比呈负相关。我们的数据表明，土壤N2O通量的大幅加速主要是由于凋落物质量的改善（低C:N比）、重量含水量的增加以及刀耕火种农业后次生热带林自发演替过程中的净氮矿化和硝化作用所刺激的无机氮有效性的增加所决定的。
The responses of soil nitrous oxide (N2O) fluxes to tropical forest development are not well documented. We linked the characteristics of N2O fluxes with community composition, N cycling, inorganic nitrogen (N) pools, as well as other soil variables during tropical secondary forest succession after slash-and-burn agriculture in Xishuangbanna, Yunnan, China. During succession, fromMallotus paniculatustoSyzygium oblatumcommunities, N2O emissions increased from 390.8 ug N m−2h−1to 671.6 ug N m−2h−1, where the greatest value occurred during the wet season. The increased soil water content following forest succession explained 71–90 % of the N2O emissions, while decreased soil temperature only contributed 66–70 % to the emissions. Net N mineralization and nitrification increased along the secondary succession of tropical forests, which was positively and nonlinearly correlated with variations in the inorganic nitrogen pool. The variations in N2O fluxes were positively correlated with net N mineralization and nitrification, ammonia and nitrate N, and microbial biomass, but negatively associated with bulk density of soils and C:N ratio of the litter and soil. Our data suggested that a substantial acceleration of soil N2O flux was mainly determined by the increasing availability of inorganic N stimulated by the improved litter quality (low C:N ratio), as well as elevated gravimetric water content, and net N mineralization and nitrification during the spontaneous succession of secondary tropical forests after slash-and-burn agriculture.
登录
查看更多内容
影响因子：
2.4
作者：
S. Raciti;A. Burgin;P. Groffman;D. N. Lewis;T. Fahey
通讯作者：
S. Raciti;A. Burgin;P. Groffman;D. N. Lewis;T. Fahey
影响因子：
4.9
作者：
Yit Arn;J. Berrío
通讯作者：
Yit Arn;J. Berrío
影响因子：
4.9
作者：
Sílvia Poblador;A. Lupon;S. Sabaté;F. Sabater
通讯作者：
Sílvia Poblador;A. Lupon;S. Sabaté;F. Sabater
影响因子：
11.6
作者：
Abalos, Diego;van Groenigen, Jan Willem;De Deyn, Gerlinde B.
通讯作者：
De Deyn, Gerlinde B.
影响因子：
8.9
作者：
M. Shaaban;Yu-peng Wu;M. S. Khalid;Q. Peng;Xiangyu Xu;Lei Wu;A. Younas;S. Bashir;Yongliang Mo;Shan Lin;M. Zafar-ul-Hye;M. Abid;R. Hu
通讯作者：
M. Shaaban;Yu-peng Wu;M. S. Khalid;Q. Peng;Xiangyu Xu;Lei Wu;A. Younas;S. Bashir;Yongliang Mo;Shan Lin;M. Zafar-ul-Hye;M. Abid;R. Hu