Comparison of litterfall production and leaf litter decomposition between an exotic black locust plantation and an indigenous oak forest near Yan’an on the Loess Plateau, China
Comparison of litterfall production and leaf litter decomposition between an exotic black locust plantation and an indigenous oak forest near Yan’an on the Loess Plateau, China
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DOI：
10.1016/j.foreco.2006.12.026
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发表时间：
2007-03
影响因子：
3.7
通讯作者：
R. Tateno;N. Tokuchi;N. Yamanaka;Sheng Du;K. Otsuki;Tetsuya Shimamura;Zhide Xue;Shengqi Wang
中科院分区：
文献类型：
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作者：
R. Tateno;N. Tokuchi;N. Yamanaka;Sheng Du;K. Otsuki;Tetsuya Shimamura;Zhide Xue;Shengqi Wang
研究了黄土高原延安地区刺槐（Robinia pseudoacacacia）种植园和辽东栎（Quercus liaotungensis）人工林凋落物产生量、林下有机质含量和凋落物分解速率。还对凋落物和土壤的化学成分进行了研究。两种林分的凋落物产量相似，但刺槐种植园凋落物中的N含量高于橡树林，因为刺槐叶中的N含量较高。刺槐叶的腐解速率高于柞树叶，很可能是因为刺槐叶中含氮量较高。这些结果表明，刺槐种植园比橡树林的N循环更大、更快。然而，更快的分解导致了刺槐种植园林地有机层的消失。此外，尽管更大的N循环在刺槐种植园，土壤中的N含量低于橡树林。研究结果表明，刺槐种植园可能比橡树林更容易受到土壤侵蚀的影响。此外，刺槐种植园在短期氮素吸收、生长和氮素循环方面具有优势，但在土壤发育和更新以及可持续土地管理方面存在不足。
Litterfall production, the amount of organic matter on the forest floor, and litter decomposition rates were studied in an exotic nitrogen (N)-fixing black locust (Robinia pseudoacacia) plantation and an indigenous non-N-fixing oak (Quercus liaotungensis) forest near Yan’an, on the Loess Plateau, China. The chemical composition of litterfall and soil was also examined. Litterfall production was similar in the two forests; however, the amount of N in litterfall was greater in the black locust plantation than in the oak forest because of the high N concentration of black locust leaves. The decomposition rate of black locust leaves was higher than that of oak leaves, most likely because of the higher N content of black locust leaves. These results suggested that N cycling was greater and faster in the black locust plantation than in the oak forest. However, faster decomposition caused the disappearance of the organic layer from the forest floor in the black locust plantation. Furthermore, despite greater N cycling in the black locust plantation, the soil N content was lower than in the oak forest. Our results indicated that the black locust plantation might be more susceptible to soil erosion than the oak forest. In addition, our study suggested that the black locust plantation had advantages in short-term N uptake, growth, and N cycling; however, it had disadvantages in soil development and regeneration and sustainable land management.