阔叶混交林与杉木萌芽林的净生产力及水源涵养能力比较  

Comparison of net productivity and water conservation capacity of mixed broad-leaved forest and Cunninghamia lanceolata sprout forests

作　　者：叶维忠 YE Weizhong(Quanzhou Forestry Bureau,Quanzhou,Fujian 362000,China)

机构地区：[1]泉州市林业局,福建泉州362000

出　　处：《亚热带农业研究》2024年第2期111-116,共6页Subtropical Agriculture Research

基　　金：福建省林业科研项目“闽东南丘陵生态林树种结构优化关键技术研究”(闽林科函[2023]26号)。

摘　　要：[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。[Purpose]The net productivity and water conservation function of the nine-year-old mixed broad-leaved forest and Cunninghamia lanceolata sprout forests in Shanmei Reservoir of Quanzhou City,Fujian Province were analyzed,so as to provide theoretical reference for reconstruction of water conservation forest in reservoir area.[Method]The growth,biomass,and annual net productivity 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 different ecosystem components were also measured.[Result]The tree layer biomass,annual net productivity,total above-ground biomass,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%,respectively.The soil water holding indexes of broad-leaved mixed forest were better than Cunninghamia lanceolata sprout forests,among 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 productivity and water conservation function,and this model can be applied in the renovation of water conservation forest.

关 键 词：山美水库 阔叶混交林 杉木萌芽林 生物量 水源涵养功能 

分 类 号：S727.21[农业科学—林木遗传育种]