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1、第44卷第1期林业科学Vol144,No112008年1月SCIENTIASILVAESINICAEJan.,2008广州城市森林涵养水源、固土保肥的功能及价值分析121111康文星郭清和何介南申初联邓湘雯赵仲辉(11中南林业科技大学长沙410004;21广州市林业局广州510030)摘要:对广州城市森林涵养水源、固土、保肥的功能及其价值进行评估,结果表明:广州城市森林生态系统每年33贮水量比无林地多61429亿m,调节径流防洪能力大21609亿m;每年植物组织净积累N元素41949万t,P元素01428万t,K元素41400万t;每
2、年凋落物归还林地N元素31524万t,P元素01216万t,K元素11539万t;每年土壤流失减少123万t,有机质流失减少31905万t,N元素流失减少01218万t,P元素流失减少01066万t,K元素流失减少21368万t;森林贮水效益11286亿元,防洪效益01522亿元,储存在植物组织中养分效益31497亿元,保持土壤效益11145亿元,改良土壤效益11872亿元,广州城市森林每年涵养水源、固土保肥的功能价值共81322亿元。关键词:城市森林;涵养水源;固土;保肥;经济评价中图分类号:S72712文献标识码:A文章编号:10
3、01-7488(2008)01-0019-07FunctionandValueAnalysisofWaterConservation,SoilReinforcementandFertilityMaintenanceofUrbanForestinGuangzhou121111KangWenxingGuoQingheHeJienanShenChulianDengXiangwenZhaoZhongHui(11CentralSouthUniversityofForestryandTechnologyChangsha410004;21Guang
4、zhouForestryBureauGuangzhou510030)Abstract:Thefunctionsandvaluesofwaterconservation,soilreinforcementandfertilitymaintenanceoftheurbanforestin83Guangzhouwereassessed.TheresultsshowedthattheurbanforestecosysteminGuangzhoucitycouldstore61429×10mwater83andadjust21609×10mfl
5、oodingmorethanthatofnon2stockedland.TheplantannualnetaccumulationofnutrientforNwas44441949×10t,forPwas01428×10t,andforKwas41400×10tandthenutrientsofannuallitterfallreturnedbackto444forestlandwerethatforNwas31524×10t,forPwas01216×10tandforKwas11539×10t;TheurbanforestinGu
6、angzhou44cityalsocouldreducesoillossintheamountof123×10t,reduceorganicmatterlossintheamountof31905×10tincluding44401218×10tN,01066×10tPand21368×10tK;Theeconomicfunctioneffectofthesystemforwaterstoragewas11286×88810yuan,forfloodingpreventionwas01522×10yuan,forfertilizerm
7、aintenancewas31497×10yuan,forsoilreinforcement88was11145×10yuanandforsoilimprovementwas11872×10yuan.Sothattheannualurbanforesteconomicfunctionvaluein8Guangzhoucityintheareasofwaterconservation,soilreinforcementandfertilizermaintenancewas81322×10yuan.Keywords:urbanforest
8、;waterconservation;soilreinforcement;fertilizermaintenance;economicevaluation城市森林在城市水文过程中发挥着重要作用,城市森林植被可减少径流7%
