生态学报2009，Vol.29Issue(11)：5971-5977,7.
湖南会同林区毛竹林地的土壤呼吸
Soil respiration of moso bamboo plantation in Huitong, Hu′nan Province
摘要
Abstract
The dynamics of CO_2 concentration in Moso bamboo(Phyllostachys edulis) plantation was studied with CID-301 portable photosynthesis system in Huitong County, Hunan Province. The results showed that the soil total respiration rate, heterotrophic respiration rate, autotrophic respiration rate and litter annual respiration rate of Moso bamboo plantation were 2.13, 1.44, 0.69 and 0.31 μmol CO_2·m~(-2)·s~(-1), respectively. It was obvious that soil respiration rate exhibited strongly annual and daily dynamic pattern in Moso bamboo plantation. The annual dynamic pattern was represented with a single-peak curve. The respiration rates increased with increasing atmospheric and soil temperature from January to July. Total soil total respiration rate, heterotrophic respiration rate, autotrophic respiration rate and litter respiration rate reached their highest values in August, being 4.95, 3.01, 1.94 and 0.80 mol CO_2·m~(-2)·s~(-1), respectively. All of these respiration rates discreased gradually with falling temperature from August to January or February in the next year. At this time, the respiration rates reached their lowest values, which were 0.76, 0.70, 0.06 and 0.05 μmol CO_2·m~(-2)·s~(-1), respectively. The daily variation of total soil respiration rate, heterotrophic respiration rate, autotrophic respiration rate and litter respiration rate of Moso bamboo plantation could also be represented with a single-peak curve. They usually showed a strong consistency with temperature. From 6:00 to 14:00, the respiration rates increased with increasing temperature, and reached the highest value from 16:00 to 18:00. After this time, they decreased until the time from 4:00 to 8:00 in next day. The amount of CO_2 released from Moso bamboo plantation was 33.94t CO_2·hm~(-2)·a-1, including 59.5% heterotrophic respiration, 28.3% autotrophic respiration and 12.2% litter respiration.关键词
毛竹林/土壤呼吸/自养呼吸/异养呼吸/凋落物呼吸Key words
Moso bamboo plantation/ soil respiration/ autotrophic respiration/ heterotrophic respiration/ litter respiration分类
农业科技引用本文复制引用
范少辉,肖复明,汪思龙,官凤英,于小军,申正其..湖南会同林区毛竹林地的土壤呼吸[J].生态学报,2009,29(11):5971-5977,7.基金项目
国家"十一五"科技支撑计划资助项目(No.2006BAD19B0104) （No.2006BAD19B0104）
