干旱区生态环境知识资源中心(Arid): Cultivation effects on soil texture and fertility in an arid desert region of northwestern China

Arid

	Cultivation effects on soil texture and fertility in an arid desert region of northwestern China
	He Mingzhu; Ji Xibin; Bu Dongsheng; Zhi Jinhu
来源期刊	干旱区科学
ISSN	1674-6767
出版年	2020
卷号	12 期号:4
英文摘要	In arid desert regions of northwestern China,reclamation and subsequent irrigated cultivation have become effective ways to prevent desertification,expand arable croplands,and develop sustainable agricultural production.Improvement in soil texture and fertility is crucial to high soil quality and stable crop yield.However,knowledge on the long-term effects of the conversion of desert lands into arable croplands is very limited.To address this problem,we conducted this study in an arid desert region of northwestern China to understand the changes in soil physical-chemical properties after 0,2,5,10,17,and 24 years of cultivation.Our results showed that silt and clay contents at the 17-year-old sites increased 17.5 and 152.3 folds,respectively,compared with that at the 0-year-old sites.The soil aggregate size fraction and its stability exhibited an exponential growth trend with increasing cultivation ages,but no significant change was found for the proportion of soil macroaggregates (>5.00 mm) during the 17 years of cultivation.The soil organic carbon (SOC) content at the 24-year-old sites was 6.86 g/kg and increased 8.8 folds compared with that at the 0-year-old sites.The total (or available) nitrogen,phosphorus,and potassium contents showed significant increasing trends and reached higher values after 17 (or 24) years of cultivation.Changes in soil physical-chemical properties successively experienced slow,rapid,and stable development stages,but some key properties (such as soil aggregate stability and SOC) were still too low to meet the sustainable agricultural production.The results of this long-term study indicated that reasonable agricultural management,such as expanding no-tillage land area,returning straw to the fields,applying organic fertilizer,reducing chemical fertilizer application,and carrying out soil testing for formula fertilization,is urgently needed in arid desert regions.
英文关键词	reclamation soil physical-chemical properties soil aggregate stability mean weight diameter (MWD) water stable aggregate percentage (WSAP) principal component analysis (PCA)
类型	Article
语种	英语
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6832307
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353489
推荐引用方式 GB/T 7714	He Mingzhu,Ji Xibin,Bu Dongsheng,et al. Cultivation effects on soil texture and fertility in an arid desert region of northwestern China[J],2020,12(4).
APA	He Mingzhu,Ji Xibin,Bu Dongsheng,&Zhi Jinhu.(2020).Cultivation effects on soil texture and fertility in an arid desert region of northwestern China.干旱区科学,12(4).
MLA	He Mingzhu,et al."Cultivation effects on soil texture and fertility in an arid desert region of northwestern China".干旱区科学 12.4(2020).