首页|南水北调中线工程核心水源区森林凋落物的持水特性

南水北调中线工程核心水源区森林凋落物的持水特性

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[目的]以鄂西北十堰市九华山林场的典型林分为对象, 研究南水北调中线工程核心水源区森林凋落物的持水特性.[方法]采取凋落物尼龙袋浸水试验法.[结果]研究的5种建群种群落凋落物层贮量以马尾松林最大, 达8.47t/hm2, 其次是亮叶桦林、日本花柏林、栓皮栎林、檫木+亮叶桦共建种群林 (3.89t/hm2) .凋落物最大持水量为马尾松林 (17.88t/hm2) , 其次为亮叶桦林、檫木+亮叶桦共建种群林和栓皮栎林, 最小为日本花柏林 (7.96t/hm2) .凋落物持水率和吸水速率均以3种落叶阔叶混交林高于2种人工针叶林, 2个指标均以檫木+亮叶桦共建种群林最大[304％和4 541.56g/ (kg·h) ], 以日本花柏林最小[165％和2 146g/ (kg·h) ].[结论]落叶阔叶混交林凋落物层的水源涵养能力强于人工针叶林, 在南水北调中线工程核心区发展落叶阔叶混交林可提高森林水文生态功能, 减少水土流失.
Water holding characteristics of litter in central water source area of the middle route of the South-north Water Diversion Project
[Objective]The objective of this study was to investigate the water-holding characteristics of forest litter in the Jiuhua Mountain Forest Farm of Shiyan City in the central water source area of the middle route of the South-North Water Diversion Project, northwestern Hubei Province of China.[Method]The water-holding characteristics of forest litter were measured by using water immersing method.[Result]The results showed that The accumulated litter amount of Pinus massoniana community was the highest among 5communities in the study area, and reached 8.47t/hm2, followed by Betula luminifera, Chamaecyparis pisifera, Quercus variabilis and Sassafras tzumu + Betula luminifera (3.89t/hm2) .The maximum water holding capacity of litter of P.massoniana community was also the highest (17.88t/hm2) , followed by B.luminifera, S.tzumu + B.luminifera, Q.variabilis and Ch.pisifera (7.96t/hm2) .The water holding capacity and water absorption rate of litter of 3deciduous broad-leaved mixed forest communities were higher than 2artificial coniferous forest communities, and the highest values were found in S.tzumu + B.luminifera (304.4％ and 4 541.56g/ (kg·h) , respectively) and the lowest in Ch.pisifera (164.8％and 2 146g/ (kg·h) , respectively) .[Conclusion]The water-conservation function of the deciduous broad-leaved mixed forest was stronger than the artificial coniferous forest and should be seriously considered in the South-North Water Diversion Project.

litter storagewater holding capacity of litterwater holding rate of litterwater absorption rate of litterSouth-North Water Diversion Project

周文昌、郑兰英、蒋龙福、刘学全、冉啟念

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湖北省林业科学研究院,湖北 武汉 430075

湖北国营竹山县九华山林场,湖北 竹山 442200

湖北省咸丰县林业调查规划设计队,湖北 咸丰 445600

凋落物储量 凋落物持水量 凋落物持水率 凋落物吸水速率 南水北调

国家科技部"十二五"项目湖北大巴山森林生态系统国家定位研究站运行补助项目

2015BAD07B04052017-LYPT-DW-057

2018

甘肃农业大学学报
甘肃农业大学

甘肃农业大学学报

CSCD北大核心
影响因子：0.612
ISSN：1003-4315
年,卷(期)：2018.53(6)
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