科研之友
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摘要
Cinnamomum camphora is an important afforestation species in the southern region of China and plays a key role in ecological restoration and urban greening. In this study, the soil nutrient status and microbial community of artificial C. camphora forests and natural broadleaf evergreen forests aged 10, 20, and 40 years in Longquan Mountain, Chengdu City, were determined. The results indicated a deterioration in the overall soil nutrient status in the 20-year-old artificial C. camphora forest. With increasing plantation age, the soil total carbon and nitrogen levels indicated a “V” shape change, while total phosphorus, potassium, and calcium indicated a continuous depletion trend. The results of phospholipid fatty acid (PLFA) indicated that the total microbial PLFAs of artificial C. camphora forests ranged from 37.00 to 67.80 nmol/g, while bacterial and fungal PLFAs ranged from 25.42 to 47.60 nmol/g and 7.19 to 10.00 nmol/g, respectively. Bacterial, G+ bacterial, Gbacterial, actinomycete, and total microbial PLFAs in artificial C. camphora forests indicated an increasing trend with stand age and were mainly regulated by soil ammonium and nitrate nitrogen. Compared with the other age groups, the majority of soil nutrients and PLFAs of various microbial communities in the 40-year-old artificial C. camphora forest was similar to those of the natural broadleaf evergreen forest. This study highlights the potential to return to healthy soil conditions as the age of C. camphora plantations increases.
- 出版日期2022
- 单位中国科学院大学
