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	Evolution of Soil Structure and Fertility After Conversion of Native Sandy Desert Soil to Irrigated Cropland in Arid Region, China
	Su, Yong Zhong; Yang, Rong; Liu, Wen Jie; Wang, Xue Feng
刊名	SOIL SCIENCE
	2010-05-01
卷号	175期号:5页码:246-254
关键词	Agricultural land use soil properties sandy desert soil cultivation sequence oasis arid region
ISSN号	0038-075X
DOI	10.1097/SS.0b013e3181e04a2d
通讯作者	Su, Yong Zhong(suyzh@lzb.ac.cn)
英文摘要	Assessment of soil quality and its direction of change with time is a primary indicator of sustainable agricultural land management. In this study, the temporal changes in soil physical and chemical properties were determined after conversion of native desert soils to irrigated croplands in a marginal oasis of the arid region, northwest China. Soil samples were collected from seven closely located farm fields that had been cultivated for 3, 5, 10, 14, 23, 30, and 40 years after agricultural cultivation, from adjacent remnant uncultivated sandy land (0 year), and from farm fields in an old oasis cultivated for more than 50 years. All the soils in the study were Psamments that derived from the deposition of aeolian sand. After cultivation, significant changes in particle size distribution and aggregate size distribution and stability in the 0- to 20-cm surface soil only occurred in soils cultivated for more than 10 years, showing a consistently increasing pattern with increasing duration of cultivation. The result indicated that soil did not contain enough coarse aggregates to control wind erosion, suggesting the need to maintain residues on the soil surface to aid wind erosion control for these newly cultivated sandy soils. As cultivation time increased, soil organic carbon (SOC), total and available N and P, cation exchange capacity, and CaCO(3) concentrations all increased. Soil organic carbon and total N concentrations increased by 6.4 times and 5.9 times, respectively, after 40 years of continuous cropping. The increased silt and clay content caused by irrigation with silt-laden river water plays an important role in the aggregate formation and SOC and nutrient accumulation and retention. The results also indicated that the evolution of desert soil toward the sustainable agricultural soil requires at least 50 years. The absolute amounts of soil aggregate, SOC, and nutrients are still low after 40 years of cropping and were insufficient to support sustaining crop production. Therefore, improved land management such as conservation tillage and crop and grass rotation is imperative to accelerate soil structure and fertility improvement and maintain long-term productivity of the farmlands.
收录类别	SCI
WOS关键词	ORGANIC-CARBON ; AGRICULTURAL MANAGEMENT ; XINJIANG PROVINCE ; NORTHWEST CHINA ; HEXI CORRIDOR ; FUBEI REGION ; CULTIVATION ; OASIS ; LAND ; SUSTAINABILITY
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	LIPPINCOTT WILLIAMS & WILKINS
WOS记录号	WOS:000278116800007
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2556305
专题	寒区旱区环境与工程研究所
通讯作者	Su, Yong Zhong
作者单位	Chinese Acad Sci, Linze Inland River Basin Res Stn, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Ecohydrol Heihe River Basin, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Su, Yong Zhong,Yang, Rong,Liu, Wen Jie,et al. Evolution of Soil Structure and Fertility After Conversion of Native Sandy Desert Soil to Irrigated Cropland in Arid Region, China[J]. SOIL SCIENCE,2010,175(5):246-254.
APA	Su, Yong Zhong,Yang, Rong,Liu, Wen Jie,&Wang, Xue Feng.(2010).Evolution of Soil Structure and Fertility After Conversion of Native Sandy Desert Soil to Irrigated Cropland in Arid Region, China.SOIL SCIENCE,175(5),246-254.
MLA	Su, Yong Zhong,et al."Evolution of Soil Structure and Fertility After Conversion of Native Sandy Desert Soil to Irrigated Cropland in Arid Region, China".SOIL SCIENCE 175.5(2010):246-254.

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