浙江天童常绿阔叶林凋落物量季节动态及其与气象因子的关系

发布时间：2018-03-08 05:17

本文选题：常绿阔叶林　切入点：凋落物　出处：《中南林业科技大学学报》2017年03期 　论文类型：期刊论文

【摘要】：为探究浙江省常绿阔叶林凋落物量的变化规律及其影响因素,从2012年至2013年,在浙江省天童山对常绿阔叶林的凋落物量进行为期2 a的定位研究。结果表明:1)两年的凋落物产量分别为1 005.68 g/m~2和773.48 g/m~2,年平均为889.58 g/m~2。这两年各组分产量的平均值大小依次为叶枝碎屑树皮花种/果,其中叶占58.88%,为优势组分。2)2年的凋落物月产量的季节变化均呈现不规则型变化趋势,出现3个峰值,最大峰值分别出现在8月和5月,各组分的峰值月也存在差异。3)凋落物量受气温和最大降水量的影响,且气温的影响程度远远大于最大降水量。不同组分凋落物量的影响因素不同:凋落物总量、碎屑凋落物量、叶凋落物量均受气温影响,且与平均气温、最高气温、最低气温正相关;树皮凋落物量受平均气温和最低气温的影响;枝凋落物量受最低气温的影响;花凋落物量受气温(平均、最高、最低)和最大降水量的影响;种/果凋落物量仅与最大降水量正相关。
[Abstract]:In order to study the variation law of litter amount and its influencing factors in evergreen broadleaved forest in Zhejiang Province, from 2012 to 2013, the changes of litter amount in evergreen broadleaved forest were studied. In Tiantong Mountain, Zhejiang Province, the litter yield of evergreen broad-leaved forest was studied for 2 years. The results showed that the litter yield for two years was 1 005.68 g / m ~ (2) and 773.48 g / m ~ (2) respectively, with an annual average of 889.58 g / m ~ (2). The average yield of each component was 889.58 g / m ~ (2). The order of leaf branches, clastic bark, flower seed / fruit, The seasonal variation of monthly yield of litter for 2 years was irregular, with three peaks, the maximum of which appeared on August and May, respectively, in which the leaf accounted for 58.88, which was the dominant component. The peak value of each component is also different. 3) litter quantity is affected by air temperature and maximum precipitation, and the influence degree of air temperature is much greater than that of maximum precipitation. The amount of leaf litter was affected by air temperature, and was positively correlated with mean temperature, maximum temperature, minimum temperature, bark litter quantity was affected by mean temperature and minimum temperature, branch litter quantity was affected by minimum temperature. The amount of flower litter was affected by air temperature (mean, highest, lowest) and maximum precipitation, and the amount of seed / fruit litter was only positively correlated with the maximum precipitation.
【作者单位】：中南林业科技大学林学院;中国林业科学研究院资源信息研究所;
【基金】：国家科技支撑计划项目(2012BAD15B04)
【分类号】：S714

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