4.7 Article

Long-term effects of pasture management and fenced riparian buffers on soil organic carbon content and aggregation

期刊

GEODERMA
卷 382, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.geoderma.2020.114666

关键词

Soil organic carbon; Permanganate oxidizable carbon; Aggregates; Grazing; Haying; Riparian buffer

资金

  1. United State Department of Agriculture Hatch Project [TEN005669]

向作者/读者索取更多资源

Soil organic carbon (SOC) is crucial in pasture agroecosystem and is influenced by management practices like manure application and grazing intensity. This study investigated the impact of 13 years of different pasture management practices on SOC content and aggregation. Results showed that rotationally grazed pastures with organic manure had higher PDXC than unfertilized areas, and rotational grazing promoted the formation of large macroaggregates.
Soil organic carbon (SOC) plays a key role in sustaining pasture agroecosystem function and its rate of accumulation can be influenced by management practices including manure deposition and grazing intensity. This study was conducted to determine the impacts of 13-years of different pasture management practices on SOC content and aggregation. The field experiment was conducted in a watershed consisted of five pasture management practices: (i) hayed (H), (ii) continuously grazed (CG), (iii) rotationally grazed (R), (iv) rotationally grazed with a grass buffer strip (RB), and (v) rotationally grazed with a fenced riparian buffer (RBR). Since 2004, all treatments received 5.6 Mg ha(-1) of poultry litter annually except the buffer area located at the base of RB and RBR. Starting from the top of hillslope, each plot was divided into three landscape positions (A, B, and C). In addition, the ungrazed, unfertilized riparian buffer strip (RBS) in RBR was also studied. In general, upper landscape positions showed greater SOC than lower positions for most of the treatments, and in particular, soils in the landscape position A had greater SOC than RBS. However, permanganate oxidizable C (PDXC) was higher in all poultry litter amended pasture systems compared to the RBS. Rotational grazing practice promoted the formation of large macroaggregates compared to other pasture management practices and RBS. All five pasture management treatments improved large macroaggregate-associated SOC content as compared to RBS, and it was higher in grazed plots than the hayed plots. Overall, this study showed that organic manure addition improved total SOC, PDXC and SOC associated with large macroaggregates, while differences in SOC among different pasture management strategies were subtle even after 13 years of continuous management.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据