干旱区生态环境知识资源中心(Arid): Contrasting impacts of plastic film mulching and nitrogen fertilization on soil organic matter turnover

Arid

DOI	10.1016/j.geoderma.2023.116714
	Contrasting impacts of plastic film mulching and nitrogen fertilization on soil organic matter turnover
	Zhang, Kaiping; Li, Zhixin; Li, Yufei; Wan, Pingxing; Chai, Ning; Li, Ming; Wei, Huihui; Kuzyakov, Yakov; Filimonenko, Ekaterina; Alharbi, Sulaiman Almwarai; Li, Feng-Min; Zhang, Wenjuan; Zhang, Feng
通讯作者	Zhang, F
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2023
卷号	440
英文摘要	Plastic film mulching and nitrogen (N) fertilization are two important field management practices used to increase crop yields in rain-fed agriculture in arid and semi-arid areas. These two practices, however, can have opposing effects on soil organic carbon (SOC) stock and turnover. To clarify and analyze the combined effects of these practices, we conducted a 7-year continuous maize cultivation experiment with four treatments: (1) no plastic film mulching without N fertilization (Control), (2) plastic film mulching without N fertilization (PFM), (3) N fertilization without plastic film mulching (N), and (4) plastic film mulching with N fertilization (PFM + N). The C-13 natural abundance of in the light and heavy fractions of organic carbon (LFOC and HFOC) was used to differentiate old (>7 years) and new (<7 years) C in the soil after C-3 to C-4 vegetation change. PFM increased soil temperature and moisture content over 7 years and led to a 150 % and 108 % increase in the above-ground and root biomass of maize, respectively. Hot and wet conditions under PFM accelerated the decomposition of both labile C (i.e., LFOC) and persistent C (i.e., HFOC), as measured by CO2 efflux from the soil. PFM decreased the LFOC and HFOC pools due to the fast decomposition of old C and inadequate stabilization of new C. Furthermore, PFM accelerated HFOC decomposition to a greater extent than that of LFOC. The Q(10) values of SOC decomposition remained similar both in the presence and absence of PFM. Nitrogen fertilization increased the aboveground and root biomass of maize by 54 % and 40 %, respectively. In the control soil, microorganisms decomposed organic N owing to limited availability of mineral N and in the absence of any from replenishment by fertilizer N. Thus, the increase in LFOC content under N fertilization, was primarily attributed to the reduced decomposition of old C. The use of N fertilization produced a similar HFOC content as that of the control soil, while also accelerating the decomposition of old C and promoting the stabilization of new C, resulting in a faster turnover rate. Consequently, the impact of N fertilization on SOC turnover was negligible owing to the contrasting effects on LFOC and HFOC. The application of N fertilization resulted in a reduction of the Q(10) value as compared to control. The combination of PFM and N fertilization accelerated the decomposition of HFOC and SOC, while having absent effect on SOC, labile C and persistent C contents. This indicates that 7 years weren't long enough to trigger a response to the combination of PFM and N fertilization from SOC and HFOC contents. In summary, PFM led to a decline in the SOC content by accelerating the decomposition of both LFOC and HFOC. Conversely, N fertilization maintained SOC content by inhibiting LFOC decomposition and enhancing HFOC decomposition.
英文关键词	Light fraction organic carbon Heavy fraction organic carbon Rain-fed Temperature sensitivity Isotopic approaches
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001124312300001
WOS关键词	EXTRACELLULAR ENZYME-ACTIVITIES ; TERM STRAW RETURN ; TEMPERATURE SENSITIVITY ; CARBON DECOMPOSITION ; MICROBIAL COMMUNITY ; LOESS PLATEAU ; CROP YIELDS ; RESPIRATION ; FRACTIONS ; GRASSLAND
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396701
推荐引用方式 GB/T 7714	Zhang, Kaiping,Li, Zhixin,Li, Yufei,et al. Contrasting impacts of plastic film mulching and nitrogen fertilization on soil organic matter turnover[J],2023,440.
APA	Zhang, Kaiping.,Li, Zhixin.,Li, Yufei.,Wan, Pingxing.,Chai, Ning.,...&Zhang, Feng.(2023).Contrasting impacts of plastic film mulching and nitrogen fertilization on soil organic matter turnover.GEODERMA,440.
MLA	Zhang, Kaiping,et al."Contrasting impacts of plastic film mulching and nitrogen fertilization on soil organic matter turnover".GEODERMA 440(2023).