北京油松天然林和人工林乔木层生产力与气候因子的关系 |
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引用本文: | 成泽虎,丁坤元,刘艳红. 北京油松天然林和人工林乔木层生产力与气候因子的关系[J]. 南京林业大学学报(自然科学版), 2016, 59(5): 177-183. DOI: 10.3969/j.issn.1000-2006.2016.05.028 |
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作者姓名: | 成泽虎 丁坤元 刘艳红 |
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作者单位: | 北京林业大学林学院, 省部共建森林培育与保护教育部重点实验室,北京 100083 |
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基金项目: | 北京市重点学科项目(20140801) |
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摘 要: | 以北京松山国家自然保护区内油松天然林和人工林为研究对象,根据冀北地区的油松生物量与胸径的关系,利用树木年轮宽度计算出过去33年中两种林分的生物量和生产力动态,并用当地的气候因子(温度与降雨)与生产力做相关分析,经多元逐步回归,得到了气候因子与生产力的回归方程。结果显示:①该地区油松天然林和人工林生物量分别从1980年的50.52 t/hm2和7.74 t/hm2增长到2013年的173.23 t/hm2和114.49 t/hm2,33 a中平均年净生产力分别为3.72 t/(hm2·a)和3.23 t/(hm2·a); ②气候分析表明两种林分乔木层生产力与气候因子均有密切关系:单月气候因子中上年8月温度、当年2月温度和当年6月降雨与油松天然林乔木层净生产力显著正相关; 当年5月降雨和当年1、2月温度与人工林显著正相关。研究表明,松山地区油松天然林乔木层生产力年际变化主要受5—7月降雨和年均气温的综合影响,人工林则更多受1—4月平均气温的影响。
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关 键 词: | 油松 天然林 人工林 生产力 气候因子 |
Relationship between arborous layer productivity and climatic factors in Pinus tabulaeformis natural forests and plantations in Beijing |
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Abstract: | In order to find the relationship between arborous layer productivity and the climatic factors, sixteen Pinus tabulaeformis plots were chosen as study area in the natural forests and plantations of Songshan Nature Reserve. The arborous layer biomass and productivity in past 33 years were counted by measuring ring width of the natural forests and plantations. Correlations were analyzed between productivity and climatic factors including temperature and precipitation, and then equation analysis between productivity and climatic factors along time series were built. During the past 33 years, the annual mean productivity of nature forests were 3.72 t/(hm2·a), arborous layer biomass increased from 50.52 t/hm2 in 1980 to 173.23 t/hm2 in 2013; and the annual mean productivity of plantations were 3.23 t/(hm2·a), arborous layer biomass increased from 7.74 t/hm2 in 1980 to 114.49 t/hm2 in 2013. Productivity of natural forests significantly positively correlated with the temperature in August of previous year and February of current year. The natural forests productivity also positively correlated with the precipitation in June significantly. Productivity of plantations positively correlated with the temperature in January and February significantly, and significantly positively correlated with the precipitation in May. Results showed that the productivity of the natural forests was mainly affected by the annual mean temperature and the precipitation from May to July, the mean temperature from January to April was the dominant factor affecting the plantations productivity. |
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Keywords: | Pinus tabulaeformis natural forests plantations productivity climatic factors |
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