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首页> 外文期刊>Journal of Plant Research >Carbon and nitrogen status of litterfall, litter decomposition and soil in even-aged larch, red pine and rigitaeda pine plantations
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Carbon and nitrogen status of litterfall, litter decomposition and soil in even-aged larch, red pine and rigitaeda pine plantations

机译：落叶松，赤松和rigitaeda松人工林凋落物，凋落物分解和土壤的碳和氮状况

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摘要

The carbon (C) and nitrogen (N) status in forest ecosystems can change upon establishment of plantations because different tree species have different nutrient cycling mechanisms. This study was carried out to evaluate C and N status of litterfall, litter decomposition and soil in three adjacent plantations consisting of one deciduous (larch: Larix leptolepis) and two evergreen (red pine: Pinus densiflora; rigitaeda pine: P. rigida × P. taeda) species planted in the same year (1963). Both the pine plantations showed comparatively higher C input from needle litter but significantly lower N concentration and input than the larch plantation (P < 0.05). During the decomposition process, the deciduous larch needle litter showed low C concentration and C remaining in soil, but high N concentration and N remaining in soil compared to the two evergreen pine needle litters. However, the soil C and N concentration and their content at a soil depth of 0-10 cm were not affected significantly (P > 0.05) by the plantation type. These results demonstrate the existence of considerable variation in C and N status resulting from needle litter input and litter decomposition in these three plantations grown at sites with similar environmental conditions.
机译：人工林建立后，森林生态系统中的碳（C）和氮（N）状况可能会发生变化，因为不同的树种具有不同的养分循环机制。这项研究旨在评估三个相邻人工林的凋落物，凋落物分解和土壤的碳和氮状况，其中三个人工林由一个落叶（落叶松：落叶松）和两个常绿（红松：松树;硬皮松：僵硬）×P taeda）于同年（1963）种植。与松树人工林相比，两种松林的针叶凋落物碳输入量均相对较高，但氮素浓度和输入量则显着降低（P <0.05）。在分解过程中，与两个常绿松针枯枝落叶相比，落叶落叶松针状枯枝落叶显示出低的C浓度和土壤中残留的C，但高的N浓度和土壤中残留的N。然而，人工林类型对土壤碳和氮浓度及其在0-10 cm深度处的含量没有显着影响（P> 0.05）。这些结果表明，在环境条件相似的这三个种植园中，针叶凋落物输入和凋落物分解导致C和N状况存在相当大的变化。

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