Wang Renjie, Ma Jianwei, Liang Huizi, Zhang Yubao, Yang Jisheng, Chen Fengfan, Wang Yong, Yan Wende
Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation, Nanning 530002, China.
Guangxi Forestry Research Institute, Nanning 530002, China.
Plants (Basel). 2023 Jun 22;12(13):2411. doi: 10.3390/plants12132411.
It is well established that forest type can have a profound impact on soil physicochemical properties but the associated changes in soil microbial communities and the mechanisms by which soil quality is improved by various plantations are not fully understood. In this study, soil physicochemical properties and microbial and enzyme activities were investigated in four forest types- pure forests (CHPF), - mixed forests (CHPEF), - mixed forests (CHMMF), and - mixed forests (CHMLF) in the subtropical region of China. The purpose of this study was to assess the effects of afforestation types on characteristics of soil-its physical, chemical, and biological properties. The results showed that the contents of soil total organic carbon (TOC), soil total nitrogen (TN), microbial biomass carbon (MBC), and microbial biomass nitrogen (MBN) were significantly improved in both CHMMF and CHMLF mixed forest stands when compared to the CHPF pure stand. Soil enzyme activities were enhanced in the mixed forests. In particular, high phosphatase activity was observed in CHMLF stands, leading to the transformation of soil phosphorus to available phosphorus in this forest type. Our study demonstrated that the broad-leaved mixed forests, but not coniferous mixed forests, could significantly improve soil quality in the study region. Our research provides a scientific insight into the promotion of vegetation restoration and plantation forest management in plantation regions of subtropical areas.
森林类型对土壤理化性质具有深远影响，这一点已得到充分证实，但土壤微生物群落的相关变化以及不同人工林改善土壤质量的机制尚未完全明晰。本研究对中国亚热带地区的四种森林类型——纯林（CHPF）、混交林（CHPEF）、混交林（CHMMF）和混交林（CHMLF）的土壤理化性质、微生物及酶活性进行了调查。本研究的目的是评估造林类型对土壤特性——其物理、化学和生物学性质的影响。结果表明，与CHPF纯林相比，CHMMF和CHMLF混交林分中的土壤总有机碳（TOC）、土壤总氮（TN）、微生物生物量碳（MBC）和微生物生物量氮（MBN）含量均显著提高。混交林中土壤酶活性增强。特别是，在CHMLF林分中观察到高磷酸酶活性，导致该森林类型中土壤磷向有效磷转化。我们的研究表明，阔叶混交林而非针叶混交林能够显著改善研究区域的土壤质量。我们的研究为亚热带人工林区植被恢复促进和人工林经营管理提供了科学见解。
