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- Title
北亚热带不同人工林林分土壤酶化学计量特征.
- Authors
汪金龙; 胡海波; 周梅佳; 吴超明; 朱 骊
- Abstract
In this study, the differences and driving factors of soil enzyme activity and the soil enzyme stoichiometric ratio and its effect on indicating soil microbial nutrient limitations and soil nutrient availability were examined in different stand plantations. The soil physical and chemical properties as well as soil enzyme activity were measured in three typical stand plantations (Pinus massoniana, Ginkgo biloba, and Liriodendron chinense × L. tulipifera) in the north subtropical region. The synergistic change in soil enzyme activity, soil physical and chemical properties, and the soil enzyme stoichiometric ratio were also analyzed. The results revealed that (1) there were significant differences in soil enzyme activities and their stoichiometric ratios in different stand plantations. The soil β-glucosidase activity in the P. massoniana plantation was significantly lower than that of the G. biloba and Liriodendron chinense × L. tulipifera hybrid plantations (P<0.05). The soil leucine amino-peptidase activity of the Liriodendron chinense × L. tulipifera hybrid as well as the G. biloba plantations were significantly higher than that of the P. massoniana plantation. The activities of β-N-acetyl-glucosaminidase and acid phosphatase in the soil of the Liriodendron chinense × L. tulipifera hybrid plantation were the highest, and the activity of acid phosphatase in the soil of the G. biloba plantation was the lowest. (2) Ce/Ne, Ce/Pe and Ne/Pe in the G. biloba plantation were the highest among the three stands. However, there was no significant difference in Ce/Pe and Ne/Pe between the P. massoniana plantation and the Liriodendron chinense × L. tulipifera hybrid plantation. The Ce/Ne of Liriodendron chinense × L. tulipifera hybrid plantation was significantly higher than that of the P. massoniana plantation (P<0.05). (3) The vector angles of enzyme stoichiometry in the three stand plantations were all greater than 45°, and the vector length in the G. biloba planation was the longest while its vector angle was the smallest. (4) The soil enzyme C∶N∶P stoichiometric was 1∶0.75∶1.90. This was a departure from 1∶1∶1 which is the global ecosystem enzyme C∶N∶P stoichiometric ratio. This indicates that soil microorganisms in the study area were limited by phosphorus and affected by the carbon limit. Redundancy analysis showed that soil organic carbon, total phosphorus, C/P, soil water content, and C/N were the main driving factors of soil enzymes and their stoichiometric ratios. Only applying compound fertilizer will aggravate the limitation of soil microbial C. Therefore, in the plantations in this area, an appropriate proportion of organic fertilizer should be applied to maintain long-term, stable, and sustainable management of the plantation.
- Subjects
LIRIODENDRON chinense; ACID phosphatase; ORGANIC fertilizers; GINKGO; SOIL microbiology; MICROBIAL enzymes; SOIL acidity
- Publication
Journal of Forest & Environment, 2023, Vol 43, Issue 1, p68
- ISSN
2096-0018
- Publication type
Article
- DOI
10.13324/j.cnki.jfcf.2023.01.009