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| Water-holding capacity of litter layer for different forest vegetation in ecological restoration of small watershed |
| Wang Jinjian 1, Cui Peixue 1, Liu Xia 2, Wang Li 2, Zhang Shuyong 2 |
| 1.Water Resources Department of Shandong Province, 250013, Jinan; 2.Department of Soil and Water Conservation, Shandong Agricultural University, 271018, Taian: Shandong, China |
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Abstract Water-holding capacity of litter layer for different forest vegetation was researched in ecological restoration of Liuzhuang small watershed, in Zoucheng city, Shandong province. Results indicate that: ①Litter layer of forest vegetation play an important role in water-holding capacity. The maximum water-holding percentage of litter layer for different forest vegetation is 85.0%～198.2%, being larger for broad leaf forest than that for coniferous forest. Coniferous forest is still remaining higher water-holding capacity, owing to the existing amount of coniferous litter is larger than that of broad leaved. The maximum water-holding capacity of litter layer for different forest vegetation is 1.54～2.53*!mm, being larger for coniferous-broad leaved mixed forests and coniferous forest than that for broad leaf forest , the order is Quercus acutissima and Platycladus orientalis>Platycladus orientalis>Pinus densiflora and Platycladus orientalis>Quercus acutissima>Robinia pseudoacacia. ②The dynamic course of water-holding capacity and water absorption rate are similar in different forest vegetation types. With the immersion time extending, the water-holding capacity is increasing. When the litter layer is immerged in the water for 8 hours, the water- holding capacity will reach the bigger value. From then on, with the time extending, the increasing range of water-holding capacity shows small. The water absorption rate of litter layer changes fastly in the front 4 hours, after then it becomes smooth. The litter layer stops absorbing water when it reaches the 24th hours. ③The effective interception of different forest vegetation was 0.61～1.43*!mm, coniferous-broad leaved mixed forests>broad leaf forest>coniferous forest, the order was Quercus acutissima and Platycladus orientalis>Robinia pseudoacacia>Quercus acutissima>Platycladus orientalis>Pinus densiflora and Platycladus orientalis.
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Received: 26 August 2004
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