[目的]分析福建省泉州市山美水库库区9年生阔叶混交林及杉木萌芽林的净生产力和水源涵养功能，为其水源涵养林的改造提供参考。[方法]设置标准样地，调查山美水库库区9年生闽粤栲×台湾相思×火力楠阔叶混交林及杉木萌芽林林分生长量、生物量及年净生产力，并测定生态系统各组分水源涵养能力。[结果]阔叶混交林乔木层生物量、年净生产力以及地上部分总生物量、最大持水量和排水能力分别比杉木萌芽林显著提高22。44％、14。73％、18。01％、18。21％和17。45％。阔叶混交林的土壤持水指标优于杉木萌芽林，其中0～40 cm 土层土壤的最大持水量和排水能力分别比杉木萌芽林显著提高17。21％和19。85％。阔叶混交林林分最大持水量和排水能力分别比杉木萌芽林显著提高17。23％和19。80％。[结论]闽粤栲×台湾相思×火力楠阔叶混交林可有效提升林分净生产力和水源涵养功能，该混交模式可在水源涵养林改造提升工程中推广应用。
Comparison of net productivity and water conservation capacity of mixed broad-leaved forest and Cunninghamia lanceolata sprout forests
[Purpose]The net productivity and water conservation function of the nine-year-old mixed broad-leaved forest and Cun-ninghamia lanceolata sprout forests in Shanmei Reservoir of Quanzhou City,Fujian Province were analyzed,so as to provide theoret-ical reference for reconstruction of water conservation forest in reservoir area.[Method]The growth,biomass,and annual net pro-ductivity were investigated in the standard plots set within nine-year-old Castanopsis fissa×Acacia confuse ×Michelia macclurei mixed broad-leaved forest and Cunninghamia lanceolata sprout forests in Shanmei Reservoir,and the water conservation functions by differ-ent ecosystem components were also measured.[Result]The tree layer biomass,annual net productivity,total above-ground bio-mass,maximum water holding capacity and drainage capacity of mixed broad-leaved forest were significantly higher than those of Cunninghamia lanceolata sprout forests,and the above indexes increased by 22.44％,14.73％,18.01％,18.21％and 17.45％,re-spectively.The soil water holding indexes of broad-leaved mixed forest were better than Cunninghamia lanceolata sprout forests,a-mong which the maximum water holding capacity and drainage capacity of 0-40 cm soil layer in mixed forest were 17.21％and 19.85％significantly higher than those of sprout forests.The maximum water capacity and drainage capacity of mixed broad-leaved forest were 17.23％and 19.80％significantly higher,respectively,compared with those of Cunninghamia lanceolata sprout forests.[Conclusion]The mixed broad-leaved forest of Castanopsis fissa×A.confuse× M.macclurei can effectively improve the stand net pro-ductivity and water conservation function,and this model can be applied in the renovation of water conservation forest.
Shanmei Reservoirmixed broad-leaved forestCunninghamia lanceolata sprout forestbiomasswater conservation function
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