Soil and Root Respiration Under Elevated CO2 Concentrations During Seedling Growth of Pinus sylvestris var. sylvestriformis

首页> 外文期刊>土壤圈（英文版） >Soil and Root Respiration Under Elevated CO2 Concentrations During Seedling Growth of Pinus sylvestris var. sylvestriformis

【24h】

Soil and Root Respiration Under Elevated CO2 Concentrations During Seedling Growth of Pinus sylvestris var. sylvestriformis

机译：樟子松幼苗生长过程中CO2浓度升高时的土壤和根系呼吸作用。樟脑

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

页面导航

摘要
著录项
相关主题

摘要

The objectives of this study were to investigate the effect of higher CO2 concentrations (500 and 700 μmol mol-1) in atmosphere on total soil respiration and the contribution of root respiration to total soil respiration during seedling growth of Pinus sylvestris var. sylvestriformis. During the four growing seasons (May-October) from 1999 to 2003, the seedlings were exposed to elevated concentrations of CO2 in open-top chambers. The total soil respiration and contribution of root respiration were measured using an LI-6400-09 soil CO2 flux chamber on June 15 and October 8, 2003. To separate root respiration from total soil respiration, three PVC cylinders were inserted approximately 30 cm deep into the soil in each chamber. There were marked diurnal changes in air and soil temperatures on June 15. Both the total soil respiration and the soil respiration without roots showed a strong diurnal pattern, increasing from before sunrise to about 14:00in the afternoon and then decreasing before the next sunrise. No increase in the mean total soil respiration and mean soil respiration with roots severed was observed under the elevated CO2 treatments on June 15, 2003, as compared to the open field and control chamber with ambient CO2. However, on October 8, 2003, the total soil respiration and soil respiration with roots severed in the open field were lower than those in the control and elevated CO2 chambers. The mean contribution of root respiration measured on June 15, 2003, ranged from 8.3% to 30.5% and on October 8, 2003,from 20.6% to 48.6%.

机译：这项研究的目的是调查大气中较高的CO2浓度（500和700μmolmol-1）对土壤总呼吸作用以及樟子松幼苗生长过程中根系呼吸作用对土壤总呼吸作用的影响。樟脑在1999年至2003年的四个生长季节（5月至10月）中，幼苗在敞顶室中暴露于高浓度的CO2中。在2003年6月15日和10月8日，使用LI-6400-09土壤二氧化碳通量室测量了土壤的总呼吸作用和根系呼吸作用。为将根系呼吸作用与土壤总呼吸作用分开，在深度约30厘米处插入了三个PVC圆柱每个房间的土壤。 6月15日，空气和土壤温度发生明显的昼夜变化。总的土壤呼吸和无根的土壤呼吸均表现出强烈的昼夜模式，从日出前增加到下午约14:00，然后在下一个日出前减少。与开放的田间和对照组相比，2003年6月15日在高浓度的CO2处理下，没有观察到平均土壤总呼吸量和根系被切断的平均土壤呼吸量增加。然而，在2003年10月8日，在开阔的田地中，总的土壤呼吸和根系被切断的土壤呼吸低于对照室和升高的CO2室。 2003年6月15日测得的根部呼吸的平均贡献在8.3％至30.5％之间，2003年10月8日在20.6％至48.6％之间。

著录项

来源
《土壤圈（英文版）》 |2007年第5期|660-665|共6页
作者

展开▼
作者单位

College of Resource Science and Papermaking Engineering, South China University of Technology, Guangzhou 510640,China;

Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016,China;

Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016,China;

Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016,China;

Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016,China;

展开▼
收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
contribution of root respiration, elevated CO2 concentration, total soil respiration;

机译：根呼吸作用;CO2浓度升高;土壤总呼吸;
入库时间 2022-08-19 04:04:16

Soil and Root Respiration Under Elevated CO2 Concentrations During Seedling Growth of Pinus sylvestris var. sylvestriformis

摘要

著录项

相关主题

期刊订阅