天童常绿阔叶林凋落物量与气象因子的关系

Relationship between litterfall production and meteorological factors in evergreen broad-leaved forest in tiantong national forest park

【目的】基于2012—2014年天童国家森林公园常绿阔叶林凋落物监测数据及对应年份的气象数据,分析天童国家森林公园常绿阔叶林凋落物总量组成,各组分月动态变化及气象因子对各组分凋落物量的影响。【方法】利用凋落物收集器野外收集凋落物,带回实验室分类、烘干,并对各组分凋落物称重。【结果】叶凋落量最大,花、种/果的比例较小;各组分凋落物量月动态变化不同,总体集中在5月至8月和11月;气象因子对凋落物各组分的影响分析表明枝、树皮、碎屑凋落量与平均气温、最高气温、最低气温显著正相关;树皮、碎屑凋落量与最大降水量显著正相关;叶、花、种/果凋落量与气象因子均无显著相关性。【结论】气象因子对天童常绿阔叶林凋落物组分及数量有一定影响。

【Objective】Based on the data of litterfall production and meteorological factors from 2012 to 2014in evergreen broadleaved forest in Tiantong National Forest Park,the litterfall production and composition and the monthly dynamic changes of components were analyzed,as well as the effect of meteorological factors on the litterfall in this paper.【Methods】The litterfall was collected using litterfall traps in the forest,and was classified into different components,which were dried and weighed in laboratory.【Results】The results showed that in the litterfall leaf accounted for the highest proportion,and flower,seed,and fruit had the lower proportions.The monthly dynamic changes of components showed different patterns,but the high litterfall productions all appeared from May to August and in November.The analysis of effect meteorological factors on litterfall showed that litterfall productions of branch,bark,and fragment exhibited significantly positive correlation with average temperature,maximum temperature,and minimum temperature.The litterfall productions of bark and fragment presented significantly positive correlation with maximum precipitation.There was no obvious correlation between meteorological factors and productions of leaf,flower,seed,and fruit.【Conclusion】The meteorological factors had a certain effect on the components and the productions of litterfall in evergreen broad-leaved forest in Tiantong National Forest Park.