请各位植物生理学翻译高手帮忙

来源：百度知道 编辑：UC知道 时间：2024/06/22 14:22:03
Despite these difficulties, results of several studies (Table 6.1) indicate that soil respiration constitutes the largest contribution to forest ecosystem respiration, with leaf and stem respiration contributing a much smaller and variable proportion. There is some evidence that total ecosystem and soil respiration are dependent on gross primary productivity of a forest ecosystem, as was shown for European forest ecosystems from a broad latitudinal and climatic gradient (Janssens et al., 2001). In a methods critique and meta-analysis of 37 studies of forest ecosystems, Hanson et al. (2000) reported a mean value of total soil CO2 efflux that could be attributed to roots of 48%, with most values between 40 and 70%. However, these data represented only mid-summer time periods, and winter root contributions were substantially lower. Amthor and Baldocchi (2001), in an assemblage of numerous studies from forest ecosystems from all parts of the world, conifer and angiosperm, managed and unman

尽管存在这些困难，数项研究结果（表6.1 ）表明，土壤呼吸的最大贡献，森林生态系统的呼吸，与茎叶呼吸贡献小得多和可变比例。有一些证据表明，总的生态系统和土壤呼吸依赖于总初级生产力的森林生态系统一样，显示欧洲森林生态系统从广泛的纬度和气候梯度（詹森斯等。 ， 2001年） 。
（ 2000年）报告的平均值为总土壤CO2流出可以归咎于基层48 ％ ，大部分价值40至70 ％。然而，这些数据只占盛夏时期，冬季根捐款大大降低。 Amthor和Baldocchi （ 2001年），在组合的许多研究报告从森林生态系统从世界所有地区，针叶树和被子植物，托管和非托管，提出比率自养呼吸总值光合作用有平均值介于0.59和0.39和 0.93 。显然，更多的研究需要找到可靠的和精确的方法估算呼吸站在整个树。

大概这样吧