Litter Fall and Nutrient Cycling in the Forest Floor of Birch and Aspen Stands in Interior Alaska
Litter Fall and Nutrient Cycling in the Forest Floor of Birch and Aspen Stands in Interior Alaska
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阿拉斯加内陆桦树和白杨林地表的凋落物和养分循环
DOI：
10.1139/x75-089
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发表时间：
1975
期刊：
影响因子：
--
通讯作者：
L. Noonan
中科院分区：
文献类型：
--
作者：
K. Cleve;L. Noonan
在4年的时间内，生物量和选定的化学元素的质量进行了测量，在凋落物从年轻，中间和成熟的年龄级的颤白杨和纸桦在内陆Alaska.平均每年沉积的生物量和质量的镁，铁，锰的一致性更大的桦树比在白杨立场的相似年龄。无论年龄组如何，白杨林分的Ca质量（范围为4.02至4.80 g m-2）始终高于白桦林分（3.18至3.45 g m-2）。 凋落物中化学元素返回到森林地面的质量的趋势一般反映在有机质的平均百分比组成。森林地面生物量的周转时间是相同的50年和120年的年龄组的桦树（16.7年）和白杨（12.7年至13.0年）。两种植物的Fe在林下周转时间最长（167 ~ 280年），K（6.9 ~ 9.7年）和Zn（5.5 ~ 11.6年）周转时间最短。
During a 4-year period the biomass and mass of selected chemical elements were measured in litter fall from young, intermediate, and mature age classes of quaking aspen and paper birch in interior Alaska.Average annual deposition of biomass and mass of Mg, Fe, and Mn were consistently greater in birch than in aspen stands of similar age. Mass of Ca was consistently greater in aspen stands (range 4.02 to 4.80 g m−2) than in birch stands (3.18 to 3.45 g m−2) regardless of age class. Trends in mass of chemical elements returned to the forest floor in litter fall were generally reflected in the average percentage composition of the organic matter.Turnover time for forest-floor biomass was about the same for both the 50- and 120-year age classes of birch (16.7 years) and of aspen (12.7 years to 13.0 years). For both species Fe had the maximum turnover time in the forest floor (167 to 280 years), with K (6.9 years to 9.7 years) and Zn (5.5 years to 11.6 years) having minimum times.Linear correlations between bi...