Effect of excising and washing treatments on the root respiration rates of Japanese cedar
Effect of excising and washing treatments on the root respiration rates of Japanese cedar
复制标题
切除和清洗处理对日本柳杉根系呼吸速率的影响
DOI：
10.1007/s10310-012-0355-0
复制
发表时间：
2013
影响因子：
1.5
通讯作者：
Hirano Y.
中科院分区：
文献类型：
--
作者：
Makita N.;Yaku R.;Ohashi M.;Fukuda K.;Ikeno H.;Hirano Y.
树木根系呼吸是森林生态系统碳平衡的重要组成部分；然而，尚不清楚根部准备处理(如摘除和冲洗)是否会影响根系呼吸测量。在这里，我们的目的是比较不同处理(即用水冲洗和不用水刷洗，切除和不切除)对17月龄柳杉幼苗根的呼吸速率的影响。在对整个根系进行采样后，立即使用配备红外气体分析仪的封闭式静态室系统对根系呼吸速率进行质量测量。我们发现，被切除10-20次的根的呼吸速率显著高于未被切除的根。洗刷处理与刷洗处理的根系呼吸速率差异不显著。我们的结果表明，大量的切除(>；10次)会导致测定的比根呼吸速率的变化产生偏差，这意味着冲洗和刷洗处理之间的差异不会影响比根呼吸速率。我们的结论是，通过标准化根准备技术，可以最大限度地减少记录的根呼吸速率的潜在差异，这应该包括迅速清除所有疏松土壤并限制根切除的程度。
Tree root respiration is an important component of the carbon balance in forest ecosystems; however, it is not clear whether root preparation treatments (such as excising and washing) affect root respiration measurements. Here, we aimed to compare the respiration rates of roots subjected to different treatments (i.e., washing with water vs. brushing without water, and excising vs. not excising) for 17-month-old seedlings ofCryptomeria japonica. Immediately after sampling an entire root system, the root respiration rate was measured on a mass basis using a closed static chamber system equipped with an infrared gas analyzer. We found that the respiration rates for roots that were excised 10–20 times were significantly higher than those for roots that were not excised. There was no significant difference in the root respiration rates between washing and brushing treatments. Our results indicate that large numbers of excisions (>10 times) could lead to bias in the measured changes in specific root respiration rates, and imply that differences between washing and brushing treatments do not affect the specific root respiration rate. We conclude that potential variation in recorded root respiration rates could be minimized by standardizing the root preparation technique, which should involve rapidly removing all loose soil and limiting the extent of root excision.