The responses of early foliar litter humification to reduced snow cover during winter in an alpine forest
The responses of early foliar litter humification to reduced snow cover during winter in an alpine forest
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DOI：
10.1139/cjss2013-121
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发表时间：
2014-05
影响因子：
1.7
通讯作者：
X. Ni;Wanqin Yang;Han Li;Liya Xu;Jie He;B. Tan;Fuzhong Wu
中科院分区：
文献类型：
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作者：
X. Ni;Wanqin Yang;Han Li;Liya Xu;Jie He;B. Tan;Fuzhong Wu
Ni、X.、杨伟，Li，H.，徐，L.，他，J.，谭，B。和Wu，F. 2014.高山森林早期叶凋落物腐殖化对冬季积雪减少的响应。可以的.《土壤科学杂志》94：453-461。积雪可以减少持续的冬季变暖的高山生物群落，影响叶凋落物腐殖化，但很少有报道。为定量研究冬季积雪减少对凋落物腐殖化的影响，在中国西南部高山森林进行了野外凋落物袋试验。2012年11月至2013年4月，在积雪形成期、积雪覆盖期和积雪融化期，研究了不同积雪深度（深积雪、中积雪、薄积雪、无积雪）下6种典型植物叶凋落物的质量损失、ΔlogK、E4/E6、腐殖化程度和腐殖化速率。结果表明，杨柳、冷杉、白桦、圆柏、落叶松和杜鹃花凋落叶腐殖化率分别为14-15%、8-9%、6-7%、5-8%，约为第一个冬季分解量的50%。此外，早期腐殖化叶凋落物（冷杉和桦树除外）积极响应减少积雪覆盖，但质量损失表现出负面的反应。这些结果表明，在气候变化的情况下，冬季积雪减少将增加土壤碳或其他物质的固存。
Ni, X., Yang, W., Li, H., Xu, L., He, J., Tan, B. and Wu, F. 2014. The responses of early foliar litter humification to reduced snow cover during winter in an alpine forest. Can. J. Soil Sci. 94: 453-461. Snow cover can be reduced by ongoing winter warming in alpine biomes, affecting foliar litter humification, but few reports are available. To quantitatively clarify how early foliar litter humification responds to reduced snow cover in winter, a field litterbag experiment was conducted in an alpine forest in southwestern China. Mass losses, ΔlogK, E4/E6, degrees of humification and humification rates of six typical local foliar litters were investigated at the snow formation, snow cover and snow melt stage under snowpack levels differing in depth (deep snowpack, medium snowpack, thin snowpack, no snowpack) from November 2012 to April 2013. The results indicated that 14-15% of willow (Salix paraplesia), 8-9% of fir (Abies faxoniana), 6-7% of birch (Betula albo-sinensis), 5-8% of cypress (Sabina saltuaria), larch (Larix mastersiana) and azalea (Rhododendron lapponicum) foliar litter was humified, which was about 50% of what decomposed during the first winter. Moreover, the early humification of foliar litter (except for fir and birch) responded positively to the reduced snow cover, but mass loss exhibited negative responses. Such results suggest that reduced snow cover in winter would increase soil carbon or other material sequestration in the scenario of climate change.