| 黄河上游退耕还林地枯落物层持水特性研究 |
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| 引用本文： | 郭雨华.黄河上游退耕还林地枯落物层持水特性研究[J].水土保持通报,2009,29(5):105-108. |
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| 作者姓名： | 郭雨华 |
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| 作者单位： | 中铁第五勘察设计院集团有限公司,北京,102600 |
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| 摘 要： | 对黄河上游的青海省大通县退耕还林地枯落物层的容水特性进行了研究.结果表明,(1)植物群落枯落物层厚度随着林龄的增加而增加;枯落物蓄积量由4.19 t/hm~2 增加到59.91 t/hm~2.(2)枯落物未分解层、半分解层容水量分别以青海云杉、青海云杉+白桦天然次生林最大,分别为27.22,60.48 t/hm~2,而青海云杉+沙棘人工林和白桦+青杨+沙棘的退耕地最小,分别为6.85,4.75 t/hm~2.对未分解层、半分解层蓄积量与容水量进行拟合,相关系数均在0.96以上.(3)退耕地人工群落的枯落物平均厚度已达到天然群落的44.20%,平均容水能力达到天然林群落的33.28%.(4)枯落物容水量与林龄、群落生物量、枯落物厚度、枯落物蓄积量均呈达到极显著相关水平.
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| 关 键 词： | 退耕还林 人工植物群落 枯落物层 容水量 |
| 收稿时间： | 2008/11/24 0:00:00 |
| 修稿时间： | 2009/2/25 0:00:00 |
Water Holding Characteristics of Litter Layer on Converted Land in Upper Reaches of the Yel low River |
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| GUO Yu-hua.Water Holding Characteristics of Litter Layer on Converted Land in Upper Reaches of the Yel low River[J].Bulletin of Soil and Water Conservation,2009,29(5):105-108. |
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| Authors: | GUO Yu-hua |
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| Institution: | The Fifth Survey and Design Institute CO, LTD.of CRCC, Beijing 102600, China |
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| Abstract: | The water holding characteristics of litter layer on the land from the converting cropland into forest land project in Datong County in the upper reaches of the Yellow River are studied experimentally. As time lasts, the thickness of litter layer incr eases and the litter layer storage capacity increases from 4.19 to 59.91t/hm2. The maximum water holding capacities in the undecomposed and half-decomposed litter layers for Picea crassifolia and Picea crassifolia + Betula platyphylla natural communities are 27.22 and 60.48 t/hm2, respectively. T he minimum capacities for Picea crassifolia + Hippop haerhamnoides and B etula platyphylla + Populuscathay ana+ Hippop haerhamnoides communities are 6.85 and 4.75t/hm2, respectively. The corr elation coefficient of the storage capacity is more than 0.96. The average thickness and water-holding ratio of litter layer for the art if icialplant communities are 44.20% and 33.28% of those of natural plant communities. The relations of the water holding capacity to age of forest, biomass, thickness, and storage capacity reaches extremely significant level ( a= 0.01). |
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| Keywords: | converting cropland into forest land artificial plant community litter layer water holding capacity |
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