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杨锦霞,张成,汪小溪,周俊容,张涵琪,鲍文华,叶如梦,田锴.纳米ZnO影响下丹江口水库消落区锈病对枯落叶分解及养分释放的影响[J].广西科学,2024,31(4):665-675. [点击复制]
- YANG Jinxia,ZHANG Cheng,WANG Xiaoxi,ZHOU Junrong,ZHANG Hanqi,BAO Wenhua,YE Rumeng,TIAN Kai.Effect of Rust on Litter Decomposition and Nutrient Release in the Water-Level Fluctuation Zone of Danjiangkou Reservoir under the Influence of Nano-ZnO[J].Guangxi Sciences,2024,31(4):665-675. [点击复制]
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| 纳米ZnO影响下丹江口水库消落区锈病对枯落叶分解及养分释放的影响 |
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杨锦霞1,2, 张成1,2, 汪小溪3, 周俊容1, 张涵琪1, 鲍文华1, 叶如梦2, 田锴1,2
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| (1.南阳师范学院生命科学与农业工程学院, 河南南阳 473061;2.河南省南水北调中线渠首湿地生态系统野外科学观测研究站, 河南南阳 473061;3.南阳市自然保护地和野生动植物保护中心, 河南南阳 473000) |
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| 摘要: |
| 大型水库消落区植物枯落物的分解常发生在水体内，是水陆物质循环和能量流动的重要组成过程。为了解植物病害和水环境污染对消落区植物分解过程的影响，本研究构建微宇宙实验模拟不同浓度的纳米氧化锌(ZnO)污染，通过测定丹江口水库消落区不同锈病程度的芦苇(Phragmites australis)枯落叶在水体中的分解速率、酶活性和养分释放特征，探究锈病和纳米ZnO对枯落物分解和水体水质的影响。结果显示，锈病严重的芦苇枯落叶分解得更快，而纳米ZnO普遍抑制分解进程，且高浓度(200 mg·L-1)污染的抑制作用最强,中、低浓度(100 mg·L-1和20 mg·L-1)污染仅对感染锈病程度较低的正常叶的分解进程具有较强的抑制作用。与分解相关的水体胞外酶酶活性受纳米ZnO浓度、锈病和分解时间交互作用的影响显著。纳米ZnO污染和锈病降低了分解过程中水环境的pH值,增加了水体可溶性有机碳和总氮含量。本研究结果为消落区植物锈病和纳米ZnO对水体生物地球化学循环的影响及水生态安全评估提供依据。 |
| 关键词: 芦苇 锈病 纳米氧化锌 丹江口水库 消落区 枯落叶分解 |
| DOI：10.13656/j.cnki.gxkx.20241206.006 |
| 投稿时间：2024-05-25修订日期：2024-09-02 |
| 基金项目:国家自然科学基金项目(32001300),河南省科技攻关项目(222102320289)和南阳师范学院自然科学类博士科研启动金项目(208203)资助。 |
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| Effect of Rust on Litter Decomposition and Nutrient Release in the Water-Level Fluctuation Zone of Danjiangkou Reservoir under the Influence of Nano-ZnO |
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YANG Jinxia1,2, ZHANG Cheng1,2, WANG Xiaoxi3, ZHOU Junrong1, ZHANG Hanqi1, BAO Wenhua1, YE Rumeng2, TIAN Kai1,2
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| (1.College of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang, Henan, 473061, China;2.Henan Field Observation and Research Station of Headwork Wetland Ecosystem of the Central Route of South-to-North Water Diversion Project, Nanyang, Henan, 473061, China;3.Nanyang Nature Reserve and Wildlife Conservation Center, Nanyang, Henan, 473000, China) |
| Abstract: |
| The decomposition of plant litter in the water-level fluctuation zone of large reservoirs often occurs in the water,being an important process in the nutrient cycle and energy flow between water and land.To explore the effects of plant disease and water environment pollution on the litter decomposition process,microcosmic experiments were carried out to simulate different degrees of nano-ZnO pollution.The decomposing rate,enzyme activities,and nutrient release of reed (Phragmites australis) litter with different grades of rust in the Danjiangkou Reservoir were determined.The effects of rust and nano-ZnO on litter decomposition and water quality were studied.The results showed that severely rusted litter decomposed faster,while nano-ZnO generally inhibited the decomposition process,with the strongest inhibitory effect at a high concentration (200 mg·L-1).The medium and low concentrations (100 mg·L-1 and 20 mg·L-1) of nano-ZnO only inhibited the normal leaves with low rust grades.The activities of extracellular enzymes involved in decomposition in the water were significantly affected by the interactive effects of nano-ZnO concentration,rust and decomposition time.Nano-ZnO pollution and rust reduced the water pH value during the decomposition process,and increased the content of dissolved organic carbon and total nitrogen in the water.The results provide a basis for revealing the effects of plant rust and nano-ZnO on the biogeochemical cycling of water and assessing water ecological security in the water-level fluctuation zone. |
| Key words: reed rust nano-ZnO Danjiangkou Reservoir water-level fluctuation zone litter decomposition |
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