...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Acta Horticulturae >Soil CO2 flux measurements in vineyard ecosystem.
【24h】

Soil CO2 flux measurements in vineyard ecosystem.

机译：葡萄园生态系统中土壤二氧化碳通量的测量。

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

Many recent studies on climate change indicate the soil as a major source for atmospheric CO2. Oxidation of soil organic matter and the respiration of plant roots produce the soil CO2 and the efflux rate to the atmosphere depends on the concentration gradient and aerodynamic resistance. Knowledge of soil respiration rate from cultivated ecosystems is important for determining the role of these ecosystems in the global carbon balance. Preliminary results are presented of field experiments conducted in two vineyards which aims to quantify spatial and temporal trends of soil respiration, and to investigate the role of soil management, irrigation and environmental factors on CO2 release from soil surface. The first experiment was conducted at Col d'Orcia vineyard near Montalcino, Tusany, Italy. The second experiment was conducted at Sella and Mosca vineyard near Alghero, Sardinia, Italy. Soil respiration rates were measured using soil chambers in an open-system configuration. Fluxes of CO2 were measured along transects between rows approximately every four hours by sealing the chambers over the collars. Higher differences were found in relation to spatial location of chambers than to time of the day. Soil tillage showed a very important influence in relation to amount of CO2 released from soil. Root distribution and activity explains the variability of soil respiration between chambers. CO2 flux was little affected by soil temperature except when the soil was wet. The observed variability indicates that correct measurements of soil CO2 efflux require an adequate number of samples and a good sample distribution.
机译：最近有关气候变化的许多研究表明，土壤是大气中二氧化碳的主要来源。土壤有机质的氧化和植物根部的呼吸作用会产生土壤CO2，而向大气的外排率取决于浓度梯度和空气动力学阻力。了解耕作生态系统的土壤呼吸速率对于确定这些生态系统在全球碳平衡中的作用非常重要。介绍了在两个葡萄园进行的田间试验的初步结果，该试验旨在量化土壤呼吸的时空趋势，并研究土壤管理，灌溉和环境因素对土壤表层CO2释放的作用。第一次实验是在意大利Tusany蒙塔尔奇诺附近的Col d'Orcia葡萄园进行的。第二个实验是在意大利撒丁岛阿尔盖罗附近的Sella和Mosca葡萄园进行的。使用开放系统配置的土壤室测量土壤呼吸速率。通过密封套环上方的腔室，大约每四个小时沿着排之间的横断面测量CO2的通量。发现与房间的空间位置相比，与一天中的时间相比，差异更大。土壤耕作对土壤释放的二氧化碳量具有非常重要的影响。根系分布和活动解释了各室之间土壤呼吸的变化。除土壤湿润外，CO 2通量几乎不受土壤温度的影响。观测到的变异性表明，正确测量土壤CO2排放量需要足够数量的样本和良好的样本分布。

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