期刊论文

中文

植物研究

1673-5102

2024

44

02

259-266

10.7525/j.issn.1673-5102.2024.02.011

2023NSFSC1167:四川省自然科学基金项目 21B0642:湖南省教育厅科学研究项目 2023NSFSC0360:四川省自然科学基金项目

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了解岷江上游干旱河谷地区12年生油松(Pinus tabulaeformis)和岷江柏(Cupressus chengiana)人工林细根(直径≤2 mm)生物量和根长密度在土层中的垂直分布状况,分析不同土层中细根系统的碳分配策略,为岷江上游干旱河谷地区植被恢复提供理论依据.以岷江上游干旱河谷地区的油松和岷江柏人工林为研究对象,采用土钻法进行取样,测定2种林分不同土层深度(h)(0 cm＜h≤15 cm和15 cm＜h≤30 cm)中吸收根(1～3级)和运输根(≥4级的细根)生物量和根长密度,以及吸收根占总细根生物量和根长密度比例.结果显示:油松和岷江柏吸收根生物量和根长密度在0 cm＜h≤15 cm土层均显著高于15 cm＜h≤30 cm土层,而运输根生...

To investigate the vertical distribution of root biomass(diameter≤2 mm)and root length density of Pinus tabulaeformis and Cupressus chengiana plantations in the arid valleys of the upper Minjiang River,and to analyze the carbon allocation strategy of fine root system in different soil layers,and to provide reference for vegetation restoration in the arid valleys of the upper Minjiang River.P.tabulaeformis and C.chengiana plantations were sampled by soil corer method,and the root biomass and root length density of absorptive roots(first to thir...