Improved grazing management may increase soil carbon sequestration in temperate steppe.
Improved grazing management may increase soil carbon sequestration in temperate steppe.
复制标题
DOI：
10.1038/srep10892
复制
发表时间：
2015-07-03
影响因子：
4.6
通讯作者：
Shen Y
中科院分区：
文献类型：
--
作者：
Chen W;Huang D;Liu N;Zhang Y;Badgery WB;Wang X;Shen Y
不同的放牧策略影响草地植物生产，也可能调节土壤碳的形成。在半干旱温带草原的一个网站，我们研究了组合的休息，高和中等放牧压力在生长季节的三个阶段，对土壤固碳过程中所涉及的影响。结果表明，适度放牧（MMM）具有最高的根系生产和周转，积累了最多的土壤碳。虽然推迟放牧（RHM和RMH）相比，MMM土壤固碳少，他们表现出更高的立根质量，保持更理想的牧草组成，并有更好的能力，保留土壤氮。持续的高放牧压力（HHH）导致地上和地下植物产量减少，土壤氮损失增加，不利的微生物环境，并减少了碳输入。在最后放牧阶段（HHM）降低放牧压力对土壤碳仍有负面影响。回归分析表明，在植被利用率为40%左右的情况下，将载畜率调整为5SE/hm ~ 2，可以获得最大的碳积累。总的来说，温带草原的土壤固碳受放牧制度的影响，放牧可以改变，以提高土壤固碳在温带草原。
Different grazing strategies impact grassland plant production and may also regulate the soil carbon formation. For a site in semiarid temperate steppe, we studied the effect of combinations of rest, high and moderate grazing pressure over three stages of the growing season, on the process involved in soil carbon sequestration. Results show that constant moderate grazing (MMM) exhibited the highest root production and turnover accumulating the most soil carbon. While deferred grazing (RHM and RMH) sequestered less soil carbon compared to MMM, they showed higher standing root mass, maintained a more desirable pasture composition, and had better ability to retain soil N. Constant high grazing pressure (HHH) caused diminished above- and belowground plant production, more soil N losses and an unfavorable microbial environment and had reduced carbon input. Reducing grazing pressure in the last grazing stage (HHM) still had a negative impact on soil carbon. Regression analyses show that adjusting stocking rate to ~5SE/ha with ~40% vegetation utilization rate can get the most carbon accrual. Overall, the soil carbon sequestration in the temperate grassland is affected by the grazing regime that is applied, and grazing can be altered to improve soil carbon sequestration in the temperate steppe.
登录
查看更多内容
影响因子：
4.8
作者：
Bardgett, RD;Wardle, DA
通讯作者：
Wardle, DA
影响因子：
5
作者：
Flaspohler, DJ;Temple, SA;Rosenfield, RN
通讯作者：
Rosenfield, RN
影响因子：
6.6
作者：
Allard, V.;Soussana, J-F.;Pinares-Patino, C.
通讯作者：
Pinares-Patino, C.
影响因子：
4.9
作者：
Gao, Ying Zhi;Giese, Marcus;Brueck, Holger
通讯作者：
Brueck, Holger
影响因子：
4.8
作者：
Frank, Douglas A.;Pontes, Alyssa W.;Fridley, Jason D.
通讯作者：
Fridley, Jason D.