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	Responses of absolute and specific soil enzyme activities to long term additions of organic and mineral fertilizer
	Zhang X. Y.; Dong, W. Y.; Dai, X. Q.; Schaeffer, S.; Yang, F. T.; Radosevich, M.; Xu, L. L.; Liu, X. Y.; Sun, X. M.
	2015
关键词	Swine manure Mineral fertilizer Soil enzyme activity Soil microbial community structure Paddy soil microbial community composition particle-size fractions solid-waste compost paddy soils phosphatase-activities subtropical china biomass-c nitrogen phosphorus management
英文摘要	Long-term phosphorus (P) and nitrogen (N) applications may seriously affect soil microbial activity. A long-term field fertilizer application trial was established on reddish paddy soils in the subtropical region of southern China in 1998. We assessed the effects of swine manure and seven different rates or ratios of NPK fertilizer treatments on (1) the absolute and specific enzyme activities per unit of soil organic carbon (SOC) or microbial biomass carbon (MBC) involved in C, N, and P transformations and (2) their relationships with soil environmental factors and soil microbial community structures. The results showed that manure applications led to increases in the absolute and specific activities of soil beta-1,4-glucosidase(beta G), beta-1,4-N-acetylglucosaminidase (NAG), and leucine aminopeptidase (LAP). The absolute and specific acid phosphatase (AP) activities decreased as mineral P fertilizer application rates and ratios increased. Redundancy analysis (RDA) showed that there were negative correlations between absolute and specific AP activities, pH, and total P contents, while there were positive correlations between soil absolute and specific beta G, NAG, and LAP enzyme activities, and SOC and total N contents. RDA showed that the contents of actinomycete and Gram-positive bacterium PLFA biomarkers are more closely related to the absolute and specific enzyme activities than the other PLFA biomarkers (P < 0.01). Our results suggest that both the absolute and specific enzyme activities could be used as sensitive soil quality indicators that provide useful linkages with the microbial community structures and environmental factors. To maintain microbial activity and to minimize environmental impacts, P should be applied as a combination of inorganic and organic forms, and total P fertilizer application rates to subtropical paddy soils should not exceed 44 kg P ha(-1) year(-1). (C) 2015 Elsevier B.V. All rights reserved.
出处	Science of the Total Environment
卷	536
页	59-67
收录类别	SCI
语种	英语
ISSN号	0048-9697
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/39055]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Zhang X. Y.,Dong, W. Y.,Dai, X. Q.,et al. Responses of absolute and specific soil enzyme activities to long term additions of organic and mineral fertilizer. 2015.

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