• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Regional Carbon Budgets; 20060816-18; Beijing(CN) >Effects of clear-cutting and slash burning on soil respiration in Chinese fir and evergreen broadleaved forests in mid-subtropical China
【24h】

Effects of clear-cutting and slash burning on soil respiration in Chinese fir and evergreen broadleaved forests in mid-subtropical China

机译：中亚热带冷杉和常绿阔叶林的伐木和刀耕火种对土壤呼吸的影响

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Soil respiration subjected to clear-cut and slash burnt treatments was estimated from late October 2001 to 2003 in a Chinese fir forest (Cunninghamia lanceolata, CL) and a secondary evergreen broadleaved forest (BF) located in Fujian Province, southeastern China. Soil respiration was measured as CO_2 evolved in situ using soda lime. Respiration levels varied seasonally with maximum rates in May to July. Clear-cut and slash burnt plots showed increases in CO_2 evolution rates and total soil respiration in October-December 2001 compared with untreated controls of both forests. In years 2002 and 2003, respiration rates as well as cumulative soil respiration were significantly lower than those of the controls. Soil temperature and moisture content at 10 cm depth were monitored on all treatments. There were no significant difference in soil temperature among treatments in each forest, while clear-cut and slash burnt treatments resulted in reduced soil moisture contents. Relationships between soil respiration and soil environmental variables were examined through regression analysis. Combining soil temperature and soil moisture content proved to be the reliable predictors of CO_2 evolution on control plots, but not on clear-cut and slash burnt plots. We concluded that the effects of clear-cutting and slash burning on soil respiration are the combined result of changes in soil autotrophic and heterotrophic respiration, and soil environment variables.
机译：据估计，2001年10月下旬至2003年，在中国杉木林（Cunninghamia lanceolata，CL）和位于中国东南部福建省的次生常绿阔叶林（BF）中，对土壤呼吸进行了明晰的砍伐处理。使用苏打石灰测量土壤中CO_2的释放量。呼吸水平随季节变化，5月至7月最高。与未经处理的两种森林的对照相比，2001年10月至12月的清晰和陡峭的烧成图显示了CO_2释放速率和土壤总呼吸的增加。在2002年和2003年，呼吸速率以及土壤累积呼吸量均显着低于对照组。在所有处理中均监测10 cm深度的土壤温度和水分含量。在每个森林中，不同处理之间的土壤温度没有显着差异，而进行明晰和刀耕火种的处理导致土壤含水量降低。通过回归分析研究了土壤呼吸与土壤环境变量之间的关系。在对照样地上，结合土壤温度和土壤水分被证明是可靠的CO_2释放预测指标，但在明晰和刀耕火种的样地上，并不是可靠的预测指标。我们得出的结论是，砍伐和砍伐对土壤呼吸的影响是土壤自养和异养呼吸变化以及土壤环境变量的综合结果。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号