干旱区生态环境知识资源中心(Arid): The stability mechanism for organic carbon of aggregate fractions in the irrigated desert soil based on the long-term fertilizer experiment of China

Arid

DOI	10.1016/j.catena.2018.10.026
	The stability mechanism for organic carbon of aggregate fractions in the irrigated desert soil based on the long-term fertilizer experiment of China
	Chai, Yanjun 1; Zeng, Xibai 2; Shengzhe, E.3; Che, Zongxian 3; Bai, Lingyu 2; Su, Shiming 2; Wang, Yanan 2
通讯作者	Zeng, Xibai
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2019
卷号	173 页码:312-320
英文摘要	Soil samples from the Hexi Corridor located in the arid regions of Northwestern China were collected from a 24-year-old field experiment. The distribution of organic carbon (OC) in the different size water stable aggregate (WSA) fractions and the stability mechanism of OC in WSA size fractions were studied. The results showed that long-term application of solo organic manures or in combination with inorganic N fertilizer significantly increased the OC concentrations of different size WSA fractions compared to the CK, while long-term application of solo N fertilizer had no significant effect. After fertilization for 24 years, the OC concentrations of 0.25-2 mm WSA fraction was significantly positively correlated with the percentages of this WSA fraction, while the OC concentrations of > 2 mm, 0.053-0.25 mm and < 0.053 mm were not significantly correlated with their corresponding percentages of WSA fractions (P > 0.05). In addition, the OC concentrations of loosely, stably and tightly bound humus in 0.25-2 mm WSA fraction were significantly higher than those in other size WSA fractions, which were also significantly correlated with the corresponding chemical components, e.g. different forms of calcium, in 0.25-2 mm WSA fraction (P < 0.05). It could be explained that affinities of OC to chemical components in 0.25-2 mm WSA fraction were stronger than those in other size WSA fractions. The results of NMR analysis also showed that the aromaticity and alkyl/O-alkyl ratio for the 0.25-2 mm WSA fractions were significantly lower than those for other size WSA fractions (P < 0.05). These results demonstrated that the 0.25-2 mm WSA fraction played an important role in stabilizing soil OC and protecting OC from degradation in the irrigated desert soil.
英文关键词	Aggregate fractions Irrigated desert soil Fertilization Organic carbon Stability mechanism
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000452814300030
WOS关键词	LAND-USE ; MEDITERRANEAN SOILS ; CHEMICAL PROTECTION ; MATTER ; DYNAMICS ; DENSITY ; REGION ; POOLS ; SIZE
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214817
作者单位	1.Zhejiang Univ Sci & Technol, Sch Environm & Nat Resources, Key Lab Recycling & Ecotreatment Waste Biomass Zh, Hangzhou 310023, Zhejiang, Peoples R China; 2.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Minist Agr China, Key Lab Agroenvironm, Beijing 100081, Peoples R China; 3.Gansu Acad Agr Sci, Inst Soil Fertilizer & Water Saving Agr, Lanzhou 730070, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Chai, Yanjun,Zeng, Xibai,Shengzhe, E.,et al. The stability mechanism for organic carbon of aggregate fractions in the irrigated desert soil based on the long-term fertilizer experiment of China[J],2019,173:312-320.
APA	Chai, Yanjun.,Zeng, Xibai.,Shengzhe, E..,Che, Zongxian.,Bai, Lingyu.,...&Wang, Yanan.(2019).The stability mechanism for organic carbon of aggregate fractions in the irrigated desert soil based on the long-term fertilizer experiment of China.CATENA,173,312-320.
MLA	Chai, Yanjun,et al."The stability mechanism for organic carbon of aggregate fractions in the irrigated desert soil based on the long-term fertilizer experiment of China".CATENA 173(2019):312-320.