| 祁连山青海云杉林枯落物层水文效应分析 |
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| 引用本文： | 刘旻霞,车克钧.祁连山青海云杉林枯落物层水文效应分析[J].甘肃农业大学学报,2004,39(4):434-438. |
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| 作者姓名： | 刘旻霞 车克钧 |
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| 作者单位： | 1. 甘肃农业大学林学院,甘肃,兰州,730070
2. 祁连山国家级自然保护局,甘肃,张掖,734000 |
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| 基金项目： | 国家林业局“中国森林生态系统研究网络“项目(96-30)。 |
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| 摘 要： | 通过对祁连山青海云杉林及其它林型凋落物累积量、分解过程随时间变化的分析,研究了枯枝落叶层的持水能力、截留作用和蓄水保土效益,青海云杉林年凋落物量为2.689 t/hm2a,它的枯落物层最大持水量相当于12.5 mm的降雨量。枯枝落叶层对降水的截留率随降水强度的增加而减小,其指数模型为:Y=92.268 e-0.0421x (R=0.973)。经分析认为祁连山青海云杉林及其它林型枯枝落叶层的水文效应最终体现在水土保持和水源涵养效能上,为综合评价祁连山水源涵养林水文效应提供了科学依据。
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| 关 键 词： | 青海云杉林 枯落物层 水文效应 祁连山 |
| 文章编号： | 1003-4315(2004)04-0434-05 |
Analysis of hydrological effects from litter of Picea crassifolia forests in Qilian Mountains |
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| LIU Min-xia,CHE Ke-jun.Analysis of hydrological effects from litter of Picea crassifolia forests in Qilian Mountains[J].Journal of Gansu Agricultural University,2004,39(4):434-438. |
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| Authors: | LIU Min-xia CHE Ke-jun |
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| Abstract: | The wilting litter accumulation and the decomposing process varying with time under Picea crassifolia forests and other types of forest in Qilian Mountains were analyzed. Also, its waterholding capacity, intercepting role, water storage and soil reduction of litter were studied. The annual litter of Picea crassifolia forests accounted to 2.689 t穐m-2穉-1. The maximum water holding capacity of the litter was equal to 12.5 mm of rainfall. The interception rate of litter was decreased while rainfall intensity was increased, and its exponential model was designed as Y=92.268 e-0.0421x (R2=0.973).It was considered that the function of litter was finally shown in the effect of water and soil conservation and the headwaters conservation, thus providing the scientific base for the comprehensive evaluation of hydrological effect on widely-distributed water resource conservation forest in this region. |
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| Keywords: | Picea crassifolia forest litter layer hydrological effect Qilian Mountains |
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