太子河源流域不同类型水源涵养林土壤微生物生物量碳、氮的季节动态

生态学杂志

太子河源流域不同类型水源涵养林土壤微生物生物量碳、氮的季节动态

涂志华¹,尉永键^1,2,范志平^1,3*,秦依婷^1,2,王善祥^1,2,韩青^1,2,邹艺华^1,2,杨兆明^1,2

(¹辽宁石油化工大学生态环境研究院，辽宁抚顺 113001；²辽宁石油化工大学化学化工与环境学部，辽宁抚顺 113001；³中国科学院沈阳应用生态研究所，沈阳 110016)

出版日期:2018-07-10 发布日期:2018-07-10

Seasonal variations of soil microbial biomass C and N in different types of water conservation forest in the headstream of Taizi River watershed.

TU Zhi-hua¹, WEI Yong-jian^1,2, FAN Zhi-ping^1,3*, QIN Yi-ting^1,2, WANG Shan-xiang^1,2, HAN Qing^1,2, ZOU Yi-hua^1,2, YANG Zhao-ming^1,2

(¹Institute of Eco-environmental Sciences, Liaoning Shihua University, Fushun 113001, Liaoning, China; ²Division of Chemistry, Chemical Engineering and Environment, LiaoningShihua University, Fushun 113001, Liaoning, China; ³Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China).

Online:2018-07-10 Published:2018-07-10

摘要/Abstract

摘要： 为探讨太子河源流域不同类型水源涵养林土壤微生物生物量的生长季动态规律，于2016年4—9月，对落叶松人工林、天然阔叶次生林和油松人工林不同土层土壤微生物量生物量碳（MBC）、氮（MBN）进行监测，并分析MBC、MBN生长季变化与土壤养分及土壤水分的关系。结果表明：天然阔叶次生林土壤MBC、MBN显著大于针叶人工林（P<0.05），且随土层增大而减小；不同类型水源涵养林土壤MBC、MBN生长季动态变化规律明显，均表现春季开始逐渐升高，夏季植物旺盛期达到最大值，秋季逐渐降低；不同植被类型土壤MBC/MBN在1~5，其季节动态变化规律先降低后升高再降低。相关性分析发现：MBC、MBN与土壤有机碳、全氮、土壤含水量呈显著正相关，表明该区域土壤有机碳、全氮、土壤含水量是影响土壤微生物生物量的重要因子；不同植被类型水源涵养林对土壤MBC、MBN均具有显著影响，天然阔叶次生林对土壤MBC、MBN的作用更大，有利于养分的累积。因此，建议在该流域开展水源涵养林建设中应加强天然林保护和促进人工林转变为天然次生林。

关键词: 海滨木槿, 生理, 干旱胁迫, 光合

Abstract: To clarify the growing season dynamics of soil microbial biomass C and N in water conservation forests in the headstream of Taizi River watershed, we measured soil microbial biomass C and N in two soil layers of Larix gmeliniiplantation, natural secondary broadleaved forest, and Pinus tabuliformis plantation from April to September 2016. The relationships between soil microbial biomass and soil nutrient and soil water were analyzed. Our results showed that soil microbial biomass C and N were significantly higher in natural secondary broadleaved forest than that in both coniferous plantations (P<0.05), but all decreased gradually with increasing soil depth. The soil microbial biomass C and N in the three forests varied significantly among seasons, i.e., increased gradually in spring, peaked in summer, and decreased in autumn. The soil microbial biomass C/N in different forests ranged from 1 to 5, showing a seasonal pattern of decrease increasedecrease. Additionally, the microbial biomass C and N had a significantly positive correlation with soil organic carbon, total nitrogen, and soil water content, suggesting that these three variables were important factors affecting soil microbial biomass. The microbial biomass C and N varied among different forest types, with natural secondary broadleaved forest being most beneficial to nutrient accumulation. More attention should be paid to the protection of natural secondary forests and the transformation of the artificial plantations into natural secondary forests in the headstream of Taizi River watershed.

Key words: physiology, drought stress, Hibiscus hamabo, photosynthesis

涂志华,尉永键,范志平,秦依婷,王善祥,韩青,邹艺华,杨兆明. 太子河源流域不同类型水源涵养林土壤微生物生物量碳、氮的季节动态[J]. 生态学杂志.

TU Zhi-hua, WEI Yong-jian, FAN Zhi-ping, QIN Yi-ting, WANG Shan-xiang, HAN Qing, ZOU Yi-hua, YANG Zhao-ming. Seasonal variations of soil microbial biomass C and N in different types of water conservation forest in the headstream of Taizi River watershed.[J]. cje.

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