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| Water-holding capacity of litter layer for various major forest types in Lianhua Lake reservoir area |
| Liu Shaochong, Duan Wenbiao, Zhao Yusen |
| College of Forestry, Northeast Forestry University, 150040,Harbin, China |
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Abstract The litter amount and water-holding characteristic of litter layers have been studied in this paper for various major forest types （Pinus koraiensis, Larix gmelinii, and weed trees） and waste grassland in Lianhua Lake reservoir area. The results indicate that the litter amount of Larix gmelinii plantations, Pinus koraiensis plantations, weed trees and waste grassland is 20.8, 23.9, 16.4, 5.7?t/hm2, respectively, in which amount of coniferous forest is the largest. Their maximum water retention rates of litter layers are 278.2%, 295.3%, 260.3%, 154.8%, respectively. The general water absorption speed varies most rapidly in 3 hours after soaked in water, reaching saturated state in about 24 hours. The water-holding speed performs remarkable power function correlation with the soaked time. Their available interception rates are 53.87%, 65.95%, 54.50%, 53.45%, respectively. Their available interception amount variation is 31.20, 45.97, 23.27, 2.94?t/hm2, respectively. The result shows that the litter layers of Pinus koraiensis have the best water-holding capacity and the waste grassland has the worst in different vegetations in Lianhua Lake reservoir area.
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Received: 12 October 2004
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