模拟雪被变化对水曲柳和兴安落叶松凋落叶分解的影响

	模拟雪被变化对水曲柳和兴安落叶松凋落叶分解的影响
其他题名	Influence of snow-depth changes on leaf litter decomposition of Fraxinus mandshurica and Larix gmelinii
	窦佳 1; 王传宽 2; 武启骞 3
	2019
发表期刊	应用生态学报
ISSN	1001-9332
卷号	30 期号:1 页码:77-84
摘要	Changes in snowpack induced by climate change can profoundly affect forest litter decomposition. A snow-depth manipulation experiment with three treatments ( i.e.,control,snowaddition, and snow-removal) was conducted to assess the effects of snow-depth changes on leaf litter decomposition of two temperate tree species [Manchurian ash ( Fraxinus mandshurica) and Dahurian larch ( Larix gmelinii) ]. The annual loss of the litter mass after one year decomposition varied between 51.3% and 57.4% for the ash and between 21.7% and 31.4% for the larch. The decomposition constants ( k) ranged from 0.048 to 0.057 and from 0.022 to 0.030 for these two species respectively. The greatest k value occurred under the snow addition treatment,while the least occurred under the snow removal treatment. Snow addition treatment shortened the 50% and 95% decomposition time by 1.1 months and 4.2 months for the ash,respectively,and by 3.7 months and 15.5 months for the larch,respectively. The snow removal treatment lengthened those decomposition time by 1.8 months and 6.4 months for the ash,and by 5.0 months and 21.1 months for the larch, respectively. Litter decomposition rate was significantly correlated with tree species,snow-depth, decomposition time,and soil temperature,but its major influencing factors varied with decomposition stage. Soil temperature and the initial litter quality were the major factors affecting decomposition rates during the snow-covered and following snow-free periods,respectively. Our findings highlight that changes in snow depth exert significantly instantaneous and prolonged effects on forest litter decomposition.
其他摘要	气候变化引起的雪被变化会深刻地影响森林凋落物的分解过程.本研究采用人工控雪处理(对照、增雪、除雪)模拟研究雪被变化对两种温带树种水曲柳和兴安落叶松凋落叶分解动态的影响.为期一年的分解试验表明:不同控雪处理下水曲柳和落叶松的凋落叶年分解率的变化范围分别为51.3%~57.4%和21.7% ~ 31.4%;两者的分解系数( k)变化范围分别为0.048~0.057和0.022~0.030,其中增雪处理的k值最大、除雪处理的k值最小.与对照相比,增雪处理下水曲柳凋落叶50%和95%分解的时间分别缩短了1.1月和4.2月,落叶松则分别缩短了3.7月和15.5月;相反,除雪处理下相应的分解时间分别延长了1.8月和6.4月(水曲柳)及5.0月和21.1月(落叶松) .此外,凋落叶分解率与树种、雪深、分解时间、土壤温度等密切相关,但其主要影响因子随分解阶段而异,表现为雪被期主要受土壤温度影响,而随后的无雪期主要受凋落叶初始质量的影响.本研究突显了雪被变化对凋落叶分解有显著的瞬时效应和延迟效应.
关键词	雪被深度凋落叶分解控制试验温带森林 snow depth foliar litter decomposition manipulation experiment temperate forest
收录类别	CSCD
语种	中文
WOS关键词	Forestry
WOS研究方向	Science & Technology
WOS类目	FORESTRY
CSCD记录号	CSCD:6426825
引用统计	被引频次：3[CSCD] [CSCD记录]
文献类型	期刊论文
专题	任务一_子任务一循证社会科学证据集成任务一
作者单位	1.东北林业大学生态研究中心, 哈尔滨, 黑龙江 150040, 中国 2.东北林业大学生态研究中心, 哈尔滨, 黑龙江 150040, 中国 3.东北林业大学生态研究中心, 哈尔滨, 黑龙江 150040, 中国
推荐引用方式 GB/T 7714	窦佳,王传宽,武启骞. 模拟雪被变化对水曲柳和兴安落叶松凋落叶分解的影响[J]. 应用生态学报,2019,30(1):77-84.
APA	窦佳,王传宽,&武启骞.(2019).模拟雪被变化对水曲柳和兴安落叶松凋落叶分解的影响.应用生态学报,30(1),77-84.
MLA	窦佳,et al."模拟雪被变化对水曲柳和兴安落叶松凋落叶分解的影响".应用生态学报 30.1(2019):77-84.