不同生境入侵植物喜旱莲子草碳排放对氮磷输入的响应

doi:10.3969/j.issn.1004-1524.20230739

浙江农业学报 ›› 2024, Vol. 36 ›› Issue (9): 2070-2078.DOI: 10.3969/j.issn.1004-1524.20230739

不同生境入侵植物喜旱莲子草碳排放对氮磷输入的响应

白健(), 罗来聪, 李爱新, 赖晓琴, 申展, 刘亮英, 郭圣茂, 张令()

江西农业大学林学院,亚热带森林资源培育江西省重点实验室,江西南昌 330045

收稿日期:2023-06-08 出版日期:2024-09-25 发布日期:2024-09-30
作者简介:*张令,E-mail: lingzhang09@126.com
白健(1997—),男,江西丰城人,博士研究生,主要从事入侵植物与碳氮循环研究。E-mail:q751737790@163.com
通讯作者: *张令,E-mail: lingzhang09@126.com
基金资助:
江西省研究生创新专项资金(YC2021-S340)

Response of carbon emissions from invasive plant alligator weed (Alternanthera philoxeroides) to nitrogen and phosphorus input in different habitats

BAI Jian(), LUO Laicong, LI Aixin, LAI Xiaoqin, SHEN Zhan, LIU Liangying, GUO Shengmao, ZHANG Ling()

Jiangxi Key Laboratory of Subtropical Forest Resources Cultivation, College of Forestry, Jiangxi Agricultural University, Nanchang 330045, China

Received:2023-06-08 Online:2024-09-25 Published:2024-09-30

摘要/Abstract

摘要：

喜旱莲子草(Alternanthera philoxeroides)的入侵能力极强,可入侵水域和陆地两种生境。采用微宇宙试验方法,在不同生境(水生、陆生)下设置不同氮、磷添加水平模拟养分输入,观测系统内含碳温室气体——甲烷(CH₄)、二氧化碳(CO₂)排放,以及生物固碳量的变化,探究不同生境下喜旱莲子草碳排放对氮、磷输入的响应。结果表明,相较于CH₄,该试验条件下的碳排放以CO₂排放为主。在水生生境下,生态系统总体表现为碳汇,且氮、磷添加促进了生态系统的碳吸收;而在陆生生境下,生态系统总体表现为碳排放,且氮、磷添加会促进生态系统的碳排放。因此,评估喜旱莲子草的碳排放时需考虑其入侵生境,以及入侵环境的养分输入状况。

关键词: 喜旱莲子草, 入侵植物, 碳排放

Abstract:

Alligator weed (Alternanthera philoxeroides) is an invasive plant, which could invade both aquatic and terrestrial habitats. In the present study, by using the microcrosmio technique, different nitrogen (N), phosphorus (P) addition levels were set to simulate nutrient input in different habitats (aquatic and terrestrial), and the emissions of carbon-containing greenhouse gases such as methane (CH₄) and carbon dioxide (CO₂), and biomass carbon sequestration were observed in the system, to explore the response of carbon emission from alligator weed to N and P input in different habitats. The results showed that the carbon emission was mainly CO₂ emission other than CH₄. In the aquatic habitats, there were mainly carbon sinks, and the N, P addition could promote the carbon sink; while in terrestrial habitats there were carbon emissions, and the N, P input could promote the carbon emissions. Thus, the invasive habitats, as well as the nutrients input status of the invasive site, should be fully considered for the accurate assessment of carbon emissions of alligator weed.

Key words: alligator weed (Alternanthera philoxeroides), invasive plant, carbon emission

中图分类号:

S451

白健, 罗来聪, 李爱新, 赖晓琴, 申展, 刘亮英, 郭圣茂, 张令. 不同生境入侵植物喜旱莲子草碳排放对氮磷输入的响应[J]. 浙江农业学报, 2024, 36(9): 2070-2078.

BAI Jian, LUO Laicong, LI Aixin, LAI Xiaoqin, SHEN Zhan, LIU Liangying, GUO Shengmao, ZHANG Ling. Response of carbon emissions from invasive plant alligator weed (Alternanthera philoxeroides) to nitrogen and phosphorus input in different habitats[J]. Acta Agriculturae Zhejiangensis, 2024, 36(9): 2070-2078.

图/表 4

图1 不同处理对CO2累积排放量和CO2排放速率的影响柱上无相同字母的表示差异显著(P<0.05)。

Fig.1 Effect of treatments on CO2cumulative emission and CO2emission rate Bars marked without the same letters indicate significant difference at P<0.05.

图2 不同生境下N添加对CH4排放速率的影响

Fig.2 Effect of N addition and on CH4 emission rate in different habitats

图3 不同处理对碳排放量的影响

Fig.3 Effect of treatments on carbon emissions

图4 不同生境下磷添加量对喜旱莲子草固碳量的影响

Fig.4 Effect of P addition on carbon sequestration of Alternanthera philoxeroides in different habitats

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不同生境入侵植物喜旱莲子草碳排放对氮磷输入的响应

Response of carbon emissions from invasive plant alligator weed (Alternanthera philoxeroides) to nitrogen and phosphorus input in different habitats

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