| The ecohydrological function of Huangqian reservior forests ecosystem, which is called water rest raintforests,is analyzed from the canopy interception,litter layer and soil layer.The result indicates that:1.The self-restraint source of water of upstream representative Huang Qian reservoir forest cover is very effective(1) P=18mm rain condition,crown canopy indicates tier to raining holding back research,different from seeds of trees,crown canopy arranges order being a Chinese pine＞Akamatsu＞Chinese arbor-vitae＞Hemp oak＞Locust,is that coniferous forest is common than crown canopy of the broad-leaved forest holds back amounts should be big to raining holding back amounts;Different forestation density holds back the amounts effect population trend to crown canopy for forestation density is getting more as big, being that crown canopy holds back amounts more.Different closing degree standing forest is identical to again assignment law raining and again assignment standing forest law being unlike forestation density to rainfall;The crown canopy mingled forest is allotted holds back amounts being going to should be many than crown canopy of pure forest holds back amounts.Crown canopy holds back amounts moreover rates are bigger in rainfall than hour of (P=4.50 mm) crown canopy entrapment.(2) Thickness and accumulation amounts of litter are connected with seeds of trees,standing forest factors such as turbid relationship way, forestation density.Broad-leaved forest dry branches and fallen leaves maximum hold water yield greater than coniferous forest.Every standing forest maximum holds the water yield order being:Loose oak of turbid relationship of loose thom of loose thom of five pieces of Pistasia chinensis forest＞Locust forest＞Maple forest＞Oak mingled forest＞Hemp oakery＞Drifts along delivering＞The red oblique tones Berlin＞Pinemm＞Oil pinetum; 24h maxima hold a water yield and forestation density has very strong correlativity,with forestation density gradually lessening,dried up forest one's duty assured source of life thing accumulation amounts reduce gradually,unit area maximum holds a water yield reduce also gradually.(3) That loose thorn oak mingled forest soil hair is in charge of a maximum holding the water yield and saturated moisture content of soil maximal.With forestation density gradually lessening,hair holds the water yield and saturation holding also corresponding lessening of water yield,soil seeps through also corresponding lessening of nature;Forest land soil seeps through speed that obvious speed greater than coniferous forest is seeped through by.general soil small opening degree effect broad-leaved forest soil, forest seeping through speed most quickly,being a locust secondly,loose turbid thorn oak relationship,loose turbid thorn relationship,five pieces of maple forrest,loose turbid relationship of oak,hemp oakery,oblique tones Berlin,oil pinetum,red pinetum of broad-leaved forest China-Israel Pistasia chinensis forest2.The function upstream representative Huang Qian reservoir forest cover is improved the soil is obvious(1) On improving the soil physical property ability,Pistasia chinensis forest maximum,secondary are locust forest,loose thorn oak mingled forest, loose thorn mingled forest,five pieces of maple forrest,loose oak mingled forest,hemp oakery,oblique tones Berlin,red pinetum and oil pinetum. Broad-leaved forest improvement soil physics properties ability is stronger than coniferous forest.Chinese pine and hemp oakery soil physical property also have very strong correlativity with forestation density.Density reduces gradually with the forestation;standing forest soil unit weight reduces gradually.(2) Broad-leaved forest mark of soil nutrient contents overtop coniferous forest obviously.Broad-leaved forest China-Israel Pistasia chinensis forest land soil nutrient contents are maximal,are locust forest, loose thorn oak mingled forest,five pieces of maple forrest,hemp oakery secondly,in coniferous forest,Berlin is maximal,is red pinetum and oil pinetum secondly with side.
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