干旱区生态环境知识资源中心(Arid): Applicability of biochar for limiting interrill erosion and organic carbon export of sloping cropland in a semi-arid area of China

Arid

DOI	10.1016/j.agee.2019.04.021
	Applicability of biochar for limiting interrill erosion and organic carbon export of sloping cropland in a semi-arid area of China
	Peng, Xiaoyu 1; Tong, Xiaogang 2; Hao, Liting 1; Wu, Faqi 2
通讯作者	Wu, Faqi
来源期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN	0167-8809
EISSN	1873-2305
出版年	2019
卷号	280 页码:68-76
英文摘要	As a recalcitrant carbon source, the residence time of biochar is estimated to be hundreds to thousands of years. Since biochar is now being applied as a soil amendment in many areas of the world, the effects of long-term stationary biochar and its applicability for limiting soil erosion and nutrient export must be considered. To this end, this study investigated the effects of biochar on interrill erosion processes and total organic carbon (TOC) export by sediment and runoff at five slope gradient levels (5 degrees, 10 degrees, 15 degrees, 20 degrees, and 25 degrees). A silt loam soil was incubated with or without wheat straw-derived biochar for 3 years in the field before carrying out a simulated rainfall experiment, in which a rainfall intensity of 60 mm h(-1) was applied for 90 min. Compared with the non-biochar control, biochar-amended soils showed decreased interrill erosion potential by up to 21.34%, due to improved soil aggregate stability and organic carbon (OC) content. No substantial differences in runoff rate were detected between the control and biochar treatments. Light soil particles with a higher OC content were transported preferentially on gentle sloping cropland (<= 15 degrees) and there was a negative correlation between the enrichment ratio of OC and sediment loss rate. The OC in sediment was the primary source of TOC export from sloping cropland, while a limiting effect of biochar for reducing this TOC export occurred between 15 degrees and 20 degrees slope gradients. Biochar amendment reduced the relative TOC export and protected sloping cropland from soil degradation. Although the biochar application enhanced soil erosion resistance, it was deemed more appropriate to use biochar as a soil amendment to <= 15 degrees-sloping cropland given its pronounced effect on TOC export.
英文关键词	Biochar Enrichment ratio Interrill erosion Organic carbon export Selective transport
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000482173700007
WOS关键词	LOESS PLATEAU ; SOIL-EROSION ; LAND-USE ; BLACK CARBON ; RUNOFF ; WATER ; SEDIMENT ; MECHANISMS ; CATCHMENT ; AGGREGATE
WOS类目	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214054
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China; 2.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Peng, Xiaoyu,Tong, Xiaogang,Hao, Liting,et al. Applicability of biochar for limiting interrill erosion and organic carbon export of sloping cropland in a semi-arid area of China[J]. 西北农林科技大学,2019,280:68-76.
APA	Peng, Xiaoyu,Tong, Xiaogang,Hao, Liting,&Wu, Faqi.(2019).Applicability of biochar for limiting interrill erosion and organic carbon export of sloping cropland in a semi-arid area of China.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,280,68-76.
MLA	Peng, Xiaoyu,et al."Applicability of biochar for limiting interrill erosion and organic carbon export of sloping cropland in a semi-arid area of China".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 280(2019):68-76.