氮硫输入对短叶茳芏枯落物温室气体产生的影响  

Influences of Sulfur and Nitrogen Inputs on Production of Greenhouse Gases of Cyperus malaccensis Litter

作　　者：张美颖 曾从盛[1,2,3] 胡伟芳[1,2] 张林海[1,2,3] ZHANG Meiying;ZENG Congsheng;HU Weifang;ZHANG Linhai(Institute of Geography, Fujian Normal University, Fuzhou 350007, China;Fujian Provincial Key Laboratory for Plant Eco-physiology, Fujian Normal University, Fuzhou 350007, China;Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou 350007, China)

机构地区：[1]福建师范大学地理研究所,福州350007 [2]福建师范大学福建省植物生理生态重点实验室,福州350007 [3]福建师范大学湿润亚热带生态-地理过程教育部重点实验室,福州350007

出　　处：《亚热带资源与环境学报》2018年第4期25-33,共9页Journal of Subtropical Resources and Environment

基　　金：福建省公益专项(2017R1034-6);福建省自然科学基金项目(NO.2015J01161)

摘　　要：探究氮(N)、硫(S)输入对枯落物温室气体产生速率的影响,对进一步认识河口湿地生物地球化学循环过程和维护区域生态安全具有重要的理论与实践意义。选取闽江河口湿地典型土著植物短叶茳芏(Cyperus malaccensis Lam. submonophyllus (Vahl) T. Koyama)作为研究对象,通过室内模拟实验,探讨不同浓度的N与S输入中N (MN,18. 2 g N m^(-2)·a^(-1))、高N(HN,27. 3 g N m^(-2)·a^(-1))、中S (MS,15. 8 g S m^(-2)·a^(-1))、高S (HS,23. 7 g S m^(-2)·a^(-1))、中N+S (MNS,18. 2 g N m^(-2)·a^(-1),15. 8 g S m^(-2)·a^(-1))和高N+S (HNS,27. 3 g N m^(-2)·a^(-1),23. 7 g S m^(-2)·a^(-1))对短叶茳芏枯落物温室气体排放的短期影响。结果表明:(1)与对照组相比,单一N、S和N+S复合输入均对闽江河口短叶茳芏枯落物CO2产生有显著促进作用,分别增加了36. 5%、43. 5%和65. 5%(P <0. 05)。(2)与对照组相比,单一N、S输入对CH4产生无显著影响(P> 0. 05);单一N输入和N+S复合输入下的CH4产生速率均呈"V"型变化趋势:前4 d产生速率下降,后3 d产生速率上升。(3)与对照相比,单一N、S输入及NS复合输入均显著促进N2O排放,分别增加了189. 5%、493. 5%和814%(P <0. 05),N2O产生速率在各处理下均呈"倒V型"变化趋势:前2 d产生速率上升,后5 d产生速率下降。(4)短期内,N、S以及N+S复合输入对短叶茳芏枯落物的全球增温潜势有促进作用。It is important to study responses of greenhouse gas production rates to input of nitrogen(N)and sulfur(S)for understanding the biogeochemical cycle and maintaining regional ecological security.Cyperus malaccensis,a typical native plants in Min River Estuary Wetlands,was selected and study short-term effects of input of N and S in different concentrations(middle nitrogen(MN,18.2g N m^-2·a^-1),high nitrogen(HN,27.3g N m^-2·a^-1),middle sulfur(MS,15.8g S m^-2·a^-1),high sulfur(HS,23.7g S m^-2·a^-1),middle nitrogen and sulfur(MN+S,18.2g N m^-2·a^-1,15.8g S m^-2·a^-1)and high nitrogen and sulfur(HN+S,27.3g N m^-2·a^-1,23.7g S m^-2·a^-1))on the greenhouse gas emissions of Cyperus malaccensis marsh.Results showed that:(1)Compared with the control,the input of N,S and N+S composite input had a significant promotion effect on the CO2production rates,and the increments were36.5%,36.5% and 36.5%respectively(P<0.05).(2)Compared with the control,the input of N and S had no obvious effect on the rate of CH4production rates(P>0.05).The CH4production rates of single N and N+S treatments significantly decreased in first4days,while it markedly increased in the next 3 days,showing a change trend of"V".(3)Compared with the control,the input of N,S and N+S had a significant promotion effect on the rate of N2O production rates,and the increments were 189.5%,493.5% and 814% respectively(P<0.05).The N2O production rates of N,S and N+S treatments significantly increased in first2days,while it decreased in the nest5days of cultivation,showing a change trend of"inverted V".(4)The short-term input of N,S and N+S significantly promoted the GWP of Cyperus malaccensis mash.

关 键 词：氮输入 硫输入 短叶茳芏枯落物 CO2、CH4、N2O气体 闽江河口湿地 

分 类 号：X171[环境科学与工程—环境科学]