成熟林における根の呼吸量の推定

概要

論文の詳細を見る
Soil respiration was measured throughout the year before and after clear-felling in a mature red pine (Pinus densiflora) forest in Hiroshima Prefecture, west Japan. The same environmental conditions as those before the felling such as light intensity, soil temperature and soil moisture content were maintained after the felling by using a frame box covered with sheets of black netting to observe soil respiration. The balance of the soil respiration rates between the two conditions before and after the felling was considered roughly to lean forward the contributions of root respiration, because the root system of the pine dies and its respiration ceases after felling. Taking into consideration CO_2 evolution due to the decomposition of roots which died as a result of the felling and the change of soil organic carbon flows after the felling, the proportion of root respiration rate in the soil respiration rate was estimated at 47-51% annually, which closely coincided with the value estimated indirectly by the cycle of soil carbon observed in primeval forests. This finding suggests that root respiration occupies about half of soil respiration in the mature forest ecosystem irrespective of the type of forest.
日本生態学会の論文
1983-12-30