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Function and value of water conservation in different age classes of Acacia mangium plantations
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For this paper,we studied the water-holding capacity of canopy,vegetation layer under canopy and litter layer,the water-holding capacity and permeability of soil as well as their changes with growth of stands in Acacia mangium plantations of three different age classes(four-,seven-and 11-year-old).Results show that total waterholding above ground in the order of 11-year stand age(52.86 t/hm2)＞seven-year stand age(41.90 t/hm2)＞seven-year stand age(25.78 t/hm2),the increment tendency increased with stand age.Similar sequence also obtained on the water-holding capacity and permeation capacity of soil (0-=40cm).The total water-storage capacity both above ground and soil in four-year-old,seven-year-old and 11year-old of A.mangium plantations were 2,023.0,2,158.4 and 2,260.4 t/hm2,respectively,and the all value of water conservation were 1,372.70,1,474.42 and 1,549.91 yuan (RMB)/hm2,respectively.Therefore,A.mangium plantation had a good ability to modify soil structure and good water conservation function.
Acacia mangium plantationage classeswaterconservation function
HE Bin、QIN Wuming、WU Qingbiao、DAI Jun、HUANG Yong、LIU Feng
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Forestry College of Guangxi University,Nanning 530004,China
Gaofeng Forestry Farm of Guangxi,Nanning 530001,China
Guangxi Forestry Surveying and Planning Institute,Nanning 530011,China
广西自然科学基金Tenth Five-Year Planof Forest Science Research of Guangxi
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NSTL
万方数据
