干旱区生态环境知识资源中心(Arid): Effects of Farmland Conversion to Orchard or Agroforestry on Soil Organic Carbon Fractions in an Arid Desert Oasis Area

Arid

DOI	10.3390/f13020181
	Effects of Farmland Conversion to Orchard or Agroforestry on Soil Organic Carbon Fractions in an Arid Desert Oasis Area
	Wang, Weixia; Ingwersen, Joachim; Yang, Guang; Wang, Zhenxi; Alimu, Aliya
通讯作者	Wang, WX
来源期刊	FORESTS
EISSN	1999-4907
出版年	2022
卷号	13 期号:2
英文摘要	In southern Xinjiang province, northwest China, farmland is undergoing rapid conversion to orchards or agroforestry. This has improved land-use efficiency but has also caused drastic ecological changes in this region. This study investigated the effects of farmland conversion to orchard or agroforestry on soil total organic carbon (TOC) and several soil labile fractions: readily oxidizable carbon (ROC), light fraction organic carbon (LFOC), and dissolved organic carbon (DOC). Soil samples were collected from seven cropping treatments: a monocultured wheat field (Mono), a 5-year-old jujube orchard (5 J), a 5-year-old jujube/wheat alley cropping system (5 JW), a 10-year-old jujube orchard (10 J), a 10-year-old jujube/wheat alley cropping system (10 JW), a 15-year-old jujube orchard (15 J), and a 15-year-old jujube/wheat alley cropping system (15 JW). The results show that the ROC concentrations varied from 0.17 +/- 0.09 g/kg to 2.35 +/- 0.05 g/kg across all land-use types and soil depths studied. It was higher in the 0-10 cm and 10-20 cm layers of treatment 10 JW than in other treatments and significantly greater than in the Mono treatment. The highest value of DOC was reached at 593.04 mg/kg in the 15 JW treatment at 0-10 cm. Labile organic carbon decreased with increasing depth in all treatments. The proportion of ROC and LFOC to TOC decreased with increasing soil depth. In all treatments, the ratio of DOC to TOC generally decreased initially and then increased again with increasing depth. Correlation analysis showed that ROC, LFOC, and DOC were closely correlated with TOC (p < 0.01). The ROC, LFOC, and DOC concentrations were significantly correlated with each other (p < 0.01). Following conversion of farmland to jujube orchard or agroforestry, the content and activity of soil organic carbon tended to increase due to augmentation of plant residues. Thus, jujube orchards and agroforestry systems are effective methods to restore soil organic carbon.
英文关键词	soil labile fractions land use jujube orchard agroforestry systems
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000762472400001
WOS关键词	MICROBIAL BIOMASS CARBON ; DIFFERENT LAND USES ; LIGHT-FRACTION ; AGRICULTURAL SOILS ; MATTER FRACTIONS ; QUALITY ; SYSTEM ; SENSITIVITY ; NITROGEN ; TILLAGE
WOS类目	Forestry
WOS研究方向	Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376397
推荐引用方式 GB/T 7714	Wang, Weixia,Ingwersen, Joachim,Yang, Guang,et al. Effects of Farmland Conversion to Orchard or Agroforestry on Soil Organic Carbon Fractions in an Arid Desert Oasis Area[J],2022,13(2).
APA	Wang, Weixia,Ingwersen, Joachim,Yang, Guang,Wang, Zhenxi,&Alimu, Aliya.(2022).Effects of Farmland Conversion to Orchard or Agroforestry on Soil Organic Carbon Fractions in an Arid Desert Oasis Area.FORESTS,13(2).
MLA	Wang, Weixia,et al."Effects of Farmland Conversion to Orchard or Agroforestry on Soil Organic Carbon Fractions in an Arid Desert Oasis Area".FORESTS 13.2(2022).