| 辽河源不同林龄油松林水源涵养能力研究 |
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| 引用本文： | 郭梦娇,朱江,程小琴,韩海荣,康峰峰,董玲玲,赵金龙,宋小帅.辽河源不同林龄油松林水源涵养能力研究[J].水土保持学报,2016(3):279-284. |
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| 作者姓名： | 郭梦娇 朱江 程小琴 韩海荣 康峰峰 董玲玲 赵金龙 宋小帅 |
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| 作者单位： | 北京林业大学林学院,北京,100083 |
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| 基金项目： | 林业公益性行业科研专项(201204101) |
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| 摘 要： | 为定量评价不同林龄油松林的水源涵养能力,采用水量平衡法和综合蓄水量法,对辽河源地区3种不同林龄油松林的降雨再分配、凋落物持水能力、土壤蓄水能力以及林分水源涵养能力进行研究。结果表明:(1)观测期间,共观测到112次降雨,累计降雨量902.2mm,平均降雨量8.1mm;小雨、中雨、大雨和暴雨分别占总降雨量的25.2%,35.5%,26.4%和12.9%;(2)不同林龄油松林的林冠截留、林内降雨和树干茎流占总降雨量的比例分别为24.1%,72.9%和3%;林内降雨与林外降雨呈显著正线性关系;随着林龄的增加,林冠截留能力增加,而树干茎流先增加后减少;(3)凋落物的最大持水量、最大吸湿比和有效拦蓄量均随着林龄的增加而增加;(4)随着林龄的增加,土壤容重减小,总孔隙度增加,土壤入渗速率提高,蓄水能力增加;(5)不同林龄油松林水源涵养能力表现为成熟林近熟林中龄林。在不同林龄的油松林中,随着演替的进行,林分对降雨的分配与截流能力、水源涵养能力逐步增强。
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| 关 键 词： | 辽河源 油松 林龄 降雨分配 水源涵养 |
| 收稿时间： | 2016/1/28 0:00:00 |
| 修稿时间： | 2016/3/7 0:00:00 |
Water Conservation Capacity of Pinus tabulaeformis Forests with Different Ages at Liaohe River |
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| GUO Mengjiao,HAN Hairong,and.Water Conservation Capacity of Pinus tabulaeformis Forests with Different Ages at Liaohe River[J].Journal of Soil and Water Conservation,2016(3):279-284. |
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| Authors: | GUO Mengjiao HAN Hairong and |
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| Institution: | Beijing Forestry University,,,Beijing Forestry University,,,, |
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| Abstract: | To evaluate the water conservation capacity of Pinus tabulaeformis forest with different ages quantitatively, water balance method and comprehensive water storage method were used to investigate the rainfall redistribution, litter water-holding capacity, soil water storage capacity of three Pinus tabulaeformis stands with different ages in Liaohe source region. The results showed that: (1) During the observation, a total of 112 times rainfall were observed, cumulative rainfall was 902.2 mm, the average rainfall was 8.1mm; the light rain, moderate rain, heavy rain and torrential rain accounted for 25.2% 35.5%, 26.4% and 12.9% of the total rainfall, respectively. (2) The percentage of crown canopy interception, forest precipitation and sap flow of Pinus tabulaeformis forests in total rainfall were 24.1%, 72.9% and 3%; there was a significant positive linear relationship between forest precipitation inside and outside; with the increase of forest age, the capacity of crown canopy interception increased, and the sap flow increased first and then decreased; (3) The maximum moisture capacity of litter, the maximum of moisture absorption ratio and effective interception amount increased with the increase of forest age; (4) With the increase of forest age, the soil bulk density reduced, but the total porosity, soil infiltration rate and storage capacity increased; (5) The water conservation capacity of Pinus tabulaeformis forest with different ages performed : mature forest > nearly mature forest > middle-aged forest. In different aged Pinus tabulaeformis stands, the ability of rainfall distribution and retention capacity and water conservation capacity increased with the succession. |
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| Keywords: | Liaohe River Pinus tabulaeformis forest age rainfall redistribution water conservation |
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