南京师大学报（自然科学版）2025，Vol.48Issue(3)：63-72,10.DOI:10.3969/j.issn.1001-4616.2025.03.008
阔叶化改培对马尾松林土壤碳氮转化的影响
Effects of Broad-Leaved Cultivation on Soil Carbon and Nitrogen Transformation in Pinus massoniana Plantation
摘要
Abstract
To conduct an in-depth exploration of the specific impacts and micro-mechanisms of different broad-leaved transformation and cultivation measures on the soil carbon and nitrogen transformation processes in Pinus massoniana plantations in subtropical regions,and to provide a scientific and precise theoretical basis for solving practical problems in the transformation and management of inefficient Pinus massoniana plantations.Taking 27-year-old Pinus massoniana plantations in subtropical regions as the research objects,the un-thinned Pinus massoniana plantations were set as the control group,and the two transformation and cultivation modes of thinning and interplanting Schima superba and thinning and interplanting Toona ciliata were used as the treatment groups.Through the determination of indicators such as soil respiration and nitrogen mineralization,the impacts and action mechanisms of different broad-leaved transformation and cultivation modes on the soil carbon and nitrogen transformation processes in Pinus massoniana plantations were systematically studied.The results showed that:(1)The soil respiration rates of the three transformation and cultivation modes showed obvious daily variations in spring,summer and autumn.The highest values all occurred in 12:00-16:00,and the lowest values basically appeared around 2:00.However,there was no obvious daily variation in winter.(2)The seasonal variation of the soil respiration rates of the three transformation and cultivation modes was higher in summer and lower in winter.In different seasons,the soil respiration rate of the thinning and interplanting Schima superba mode was the highest,and that of the un-thinned Pinus massoniana plantation was the lowest.(3)The seasonal changes of soil ammonium nitrogen,nitrate nitrogen,total mineral nitrogen content,soil net ammonification rate,net nitrification rate,and total mineralization rate of the three transformation and cultivation modes all presented unimodal curves.In different seasons,the nitrogen transformation rates of the two interplanting modes were higher than those of the control.(4)The soil respiration of the three transformation and cultivation modes was not only affected by the change of soil temperature but also regulated by soil moisture.The temperature sensitivity coefficient of soil respiration was the highest in the thinning and interplanting Schima superba mode.Annual litterfall,soil total carbon,soil total nitrogen,soil pH,and fine root biomass were significantly positively correlated with soil respiration rate and total nitrogen mineralization rate,while litter carbon-nitrogen ratio,litter lignin/N,soil bulk density,and fine root carbon-nitrogen ratio were significantly negatively correlated with soil respiration rate and total nitrogen mineralization rate.The forest gap effect in the early stage of thinning and the differences in the quantity and quality of soil organic carbon input,soil physical and chemical properties,and microbial activity mediated by interplanting different broad-leaved trees led to the improvement of soil respiration rate,soil respiration temperature sensitivity,and soil nitrogen transformation rate in Pinus massoniana plantations through broad-leaved transformation and cultivation.关键词
马尾松人工林/阔叶树/质量提升/土壤呼吸/氮矿化Key words
Pinus massoniana plantation/broad-leaved tree/quality improvement/soil respiration/nitrogen mineralization分类
林学引用本文复制引用
高伟,林国江,颜耀,郑兆飞,郑清东..阔叶化改培对马尾松林土壤碳氮转化的影响[J].南京师大学报（自然科学版）,2025,48(3):63-72,10.基金项目
福建省中青年教师教育科研重点项目(JZ230077)、福建省林业科学研究项目(2023FKJ31)、福建省科技计划项目(2021Y6003). （JZ230077）
