南京林业大学学报（自然科学版）Issue(3)：71-76,6.DOI:10.3969/j.issn.1000-2006.2014.03.014
滇中高原云南松幼林和成熟林土壤呼吸及主要影响因子分析
Soil respiration and its affecting factors in young and mature forests of Pinus yunnanensis in middle Yunnan plateau, China
摘要
Abstract
In order to understand the characteristics of soil respiration ( Rs) and its controlling factors in the young and mature forests of pine ( Pinus yunnanensis) in Mopan Mountain National Forest Park of Yunnan province, we measured seasonal variations of Rs with Li-6400-09 chamber. The results were shown as follows: Rs fluctuated distinctly with seasonal patterns in the two sites. The rate of Rs in the mature forest (1.09-3.69μmol/(m2·s)) was significantly high-er than that in the young forest (0.88-3.08μmol/(m2·s)). The contribution of soil moisture to Rs was significantly higher than that of soil temperature, which could be responsible for seasonal variation of Rs about 49.3%-79.4% in the young forest, and 63.3% -76.0% in the mature forest, respectively. The pH and soil nutrients had significant influences on Rs. The significant impacts of total P and pH on Rs were positive, and that of C/N was negative in two sites. Soil moisture had significantly positive relationship with total N and negative relationship with C/N in two sites, while the sig-nificant relationship between moisture content and soil total P as well as pH was only found in the mature pine forest. The results suggested that the severe drought in the southwest region led to the significant decrease of soil moisture, which may exert strong influence on Rs in the two sites. Moreover, soil moisture could have significant control on the spatial and tem-poral variation of Rs through its influence on soil permeability and soil nutrient in the young and mature pine forests.关键词
云南松林/土壤呼吸/土壤温度/土壤含水量/土壤养分Key words
Pinus yunnanensis plantation/soil respiration/soil temperature/soil moisture/soil nutrient分类
农业科技引用本文复制引用
赵吉霞,王邵军,陈奇伯,王艳霞,熊好琴..滇中高原云南松幼林和成熟林土壤呼吸及主要影响因子分析[J].南京林业大学学报（自然科学版）,2014,(3):71-76,6.基金项目
国家林业公益性行业科研专项项目 （）
