Species-specific herbivore grazing of type-specific grassland can assist with promotion of shallow layer of soil carbon sequestration
Species-specific herbivore grazing of type-specific grassland can assist with promotion of shallow layer of soil carbon sequestration
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特定类型草地的特定物种草食动物放牧有助于促进浅层土壤固碳
DOI：
10.1088/1748-9326/ac302f
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Deli Wang
中科院分区：
文献类型：
--
作者：
Jie Li;Hua Chai;Shiwen Ding;Jinsong Wang;Xincheng Li;Yinong Li;Tianyun Li;Jushan Liu;Hongjun Wang;Cunzhu Liang;Chengjie Wang;Yuan Liu;Yiqi Luo;Ling Wang;Deli Wang
草原土壤是一个重要的大气CO2封存潜力池，但这个潜力池的大小在一定程度上取决于草地的放牧管理。不同的草食动物种类和组合(草食动物组合)是否会影响不同草原的土壤有机碳(SOC)，目前尚不清楚。在这里，我们研究了在中等放牧强度下，不同草食动物组合(NG，不放牧；SG，绵羊放牧；CG，牛；MG，羊和牛的混合放牧)对欧亚大陆东部温带草原三种不同草原类型(草甸草原、典型草原和荒漠草原)浅层有机碳储存的影响。我们发现，草食动物物种对土壤有机碳储量的影响取决于草地类型。在中草甸草原(即草甸草原和典型草原)，CG促进了土壤有机碳的储存，而SG对土壤有机碳的储存没有影响。相比之下，在干旱草原(即荒漠草原)，SG显著增加了SOC的储量，而CG则没有观察到任何影响。重要的是，绵羊和牛的MG持续增加了所有草原类型的SOC储量。我们认为，在不同的草原上采取食草动物类型的专门化管理有助于提高生态系统的C功能和服务能力；大型食草动物和小型食草动物分别适合在中生草原和旱生草原放牧。此外，不同草食动物的MG放牧方式可能是中国北部大部分草原土壤固碳的最佳适度放牧方式。
Grassland soils represent a significant potential pool for the sequestering of atmospheric CO2; however, the magnitude of this pool depends to a certain extent on the grazing management of the grassland. Whether different herbivore species and combinations (herbivore assemblage) influence the soil organic carbon (SOC) in various grasslands remains unclear. Here we have investigated the impacts of herbivore assemblages (NG, no grazing; SG, sheep grazing; CG, cattle grazing; and MG, mixed grazing of sheep and cattle) under moderate grazing intensity on a shallow layer of SOC storage across the three different grassland types (meadow steppe, typical steppe, and desert steppe) in the temperate steppes of Eastern Eurasia. We found that herbivore-species-specific effects on SOC storage depended on the grassland type. In mesic grasslands (i.e. meadow steppe and typical steppe), CG enhanced SOC storage, but there were no effects from SG. In contrast, SG in the xeric grassland (i.e. desert steppe) dramatically increased SOC storage while no effects were observed for CG. Importantly, MG of sheep and cattle consistently increased SOC storage across all grassland types. We suggest that adopting herbivore-type-specific stewardship in different grasslands could assist with the enhancement of ecosystem C functionality and services; large herbivores and small herbivores are suitable for grazing in mesic grasslands and xeric grasslands, respectively. Moreover, MG with diverse herbivores may be the optimal moderate grazing mode for soil C sequestration in most grasslands of northern China.
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影响因子：
5.5
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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