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| Effects of structure of the Larix gmelini plantation on soil-hydrology characteristic |
| Wu Chunyan,Zhao Yusen,Xin Ying,Kong Xiangfei,Li Zhifei |
| College of Forestry,Northeast Forestry University,150040,Harbin,China |
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Abstract This paper aimed at studying the effects of structure of Larix gmelini plantation on soil-hydrology characteristics.Soil physical properties, soil water storage capacity,and permeability were analysed within different structural types of Larix gmelini plantation,located in Maoershan of Shangzhi City,Heilongjiang Province.The results showed that: 1)The descending order of the means of soil bulk density was: uniform structure,six-line structure,four-line structure,two-line structure,respectively.And the means of soil bulk dentisty were 1.33,1.22,1.19 and 1.10 g/cm3, respectively.The trend of total porosity was opposite to that of soil bulk density.The values of total porosity of four Larix gmelini plantations were 26.36%,48.99%,54.49% and 56.00%,respectively.2)The range of initial soil permeability was 1.20-2.27 mm/min.Additionally,the descending order of infiltration coefficient K10 at 10 ℃ was two-line structure(1.04 mm/min),four-line structure(0.81 mm/min),six-line structure(0.67 mm/min),uniform structure(0.61 mm/min),the tendency of the 30 min infiltration accumulation was the same as that of K10.3) Within the range of 40 cm soil depth,the volume of saturated water was between 1 054.20-2 239.80 t/hm2,that of two-line structure is maximum.In conclusion,the soil hydrology effectiveness of Larix gmelini plantation with two-line structure was higher compared to other structure types.Therefore,it is an optimum method to construct Larix gmelini plantation.
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Received: 08 March 2009
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