[Effects of 40 Years of Fertilizer Application on the Characteristics of Soil Enzymatic Stoichiometry in Black Soil].
Huan Jing Ke Xue
; 45(8): 4915-4922, 2024 Aug 08.
Article
in Zh
| MEDLINE
| ID: mdl-39168707
ABSTRACT
Microorganisms produce extracellular enzymes to meet elemental requirements and cope with stoichiometric imbalances of resources. To gain insights into the cycling of C, N, and P, the activities of the Câ¶Nâ¶P acquisition enzymes have been extensively investigated. To detect the effects of long-term fertilization practices on soil nutrient balance and characteristics of soil enzymatic stoichiometry in black soil, four different fertilization treatments were selectedï¼ no fertilization ï¼CKï¼, nitrogen fertilizer ï¼Nï¼, phosphorus fertilizer ï¼Pï¼, and combination of nitrogen and phosphorus fertilizers ï¼NPï¼. Soil samples were collected in both April 2021 and April 2022 to determine soil enzyme activities and their stoichiometric characteristics. The results showed that soil acid phosphatase and ß-D-glucosidase activities were significantly higher in the N and NP treatments than in CK by 68%-158% and 26%-222%, respectively. Soil ß-N-acetylaminoglucosidase activities were significantly higher in the P and NP treatments, with the highest around 75.48 nmol·ï¼g·hï¼-1 and 106.81 nmol·ï¼g·hï¼-1, respectively. Two-way ANOVA analysis showed that N and P inputs had a great impact on soil enzyme activities. Redundancy analysis showed that the main factors controlling enzyme activities were soil pH, microbial biomass phosphorus, and soil available P content. It was found that N inputs significantly increased enzyme vector length, which was ranged from 1.32 to 1.52, and the enzyme vector angles were all larger than 45°, suggesting C and P co-limited in the black soils. These findings suggest that 40 years of fertilization have had a great impact on soil enzymes and the related resource use strategy, which provides great implications for assessing soil nutrients balance and soil sustainability.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Phosphorus
/
Soil
/
Soil Microbiology
/
Fertilizers
/
Nitrogen
Country/Region as subject:
Asia
Language:
Zh
Journal:
Huan Jing Ke Xue
Year:
2024
Document type:
Article
Affiliation country:
China
Country of publication:
China