期刊论文

Effects of different forest management practices on fine root decomposition and nutrient release in Pinus massoniana forests

中文

生态学杂志

1000-4890

2019

38

8

2337-2345

10.13292/j.1000-4890.201908.018

中国林科院基本科研业务费专项(CAFYBB2018QB004) 湖北省自然科学基金项目(2017CFB694)资助

本校为第一机构

细根(直径≤2 mm)是森林生态系统重要的碳库之一,其寿命短、代谢活性高,对外界环境变化十分敏感。了解不同营林措施对细根分解和养分释放的影响,对于合理开展森林经营管理具有重要意义。以三峡库区马尾松(Pinus massoniana)飞播林为对象,设置未择伐(NC)、除灌(SC)、伐除非马尾松(NPMC)和伐除优势马尾松(DPMC)等营林措施,在处理3年后,利用分解袋法研究不同营林措施对相同初始基质质量的马尾松细根分解和养分释放的影响。经过1年的分解,不同营林措施明显改变了土壤温湿度、土壤养分以及土壤微生物量碳氮,而对马尾松细根分解速率的影响不显著(P>0.05),细根分解速率与各环境因子间均无显著相关性。在...

As a vital carbon sink in forest ecosystems, fine roots (≤2 mm in diameter) with short life span and high metabolic activity are sensitive to environmental changes. It is important to understand the mechanisms of fine root decomposition and nutrient release in response to forest management practices. To examine the effects of forest management on fine root decomposition, we employed three selective cutting managements, including shrub cutting (SC), non Pinus massoniana cutting (NPMC) and dominant P. massoniana cutting (DPMC), and a control wit...