广西林业科学2025，Vol.54Issue(5)：488-495,8.DOI:10.19692/j.issn.1006-1126.20250503
咪唑烟酸治理互花米草对北部湾滨海湿地土壤生态化学计量特征的影响
Effects of Using Imazapyr to Control Spartina alternifloraon Soil Ecological Stoichiometric Characteristics in Coastal Wetland of Beibu Gulf
摘要
Abstract
In order to understand effects of using imazapyr to control Spartina alterniflora on soil in coastal wet-land of Beibu Gulf,Guangxi and provide basis for scientific control of S.alterniflora in Beibu Gulf,in typical S.alterniflora invaded areas of Beibu Gulf,sample plots of using imazapyr to control S.alterniflora with differ-ent imazapyr concentrations were set,which were 11.940(L1),14.925(L2)and 17.910(L3)respectively,and sample plot with no imazapyr was set as control(L0).Changes of soil chemical properties and ecological stoi-chiometric characteristics and their relationships were analyzed after imazapyr treatments.Results showed that control efficiencies of S.alterniflora were 100%in imazapyr treatments with different concentrations on 120th days after experiment.On 120th days after experiment,pH of L0 treatment was significantly higher than that be-fore experiment,which was significantly lower in L1 treatment and had no significant differences in L2 and L3 treatments.Compared with L0 treatment,contents of total phosphorus in L1-L3 treatments,contents of total po-tassium in L2 and L3 treatments,content of available phosphorus in L1 treatment and content of ammonium ni-trogen in L2 treatment exhibited significant loss phenomena on 120th days after experiment.Contents of total phosphorus and total nitrogen were primary environmental factors influencing ecological stoichiometric ratios,which played crucial roles in soil nutrient balance.On 120th days after experiment,soil C∶N in L1-L3 treat-ments were 20.15,17.97,18.51 and 17.03 respectively,all of which were higher than national average C∶N(14.35)for surface soils(0-10 cm).From before experiment to 120th days after experiment,soil N∶P in L0-L3 treatments were significantly lower than national average N∶P(9.30)for surface soils(0-10 cm),indicating that soil in this region was nitrogen-limited.Using imazapyr to control S.alterniflora had certain effects on soil pH,nutrient contents and ecological stoichiometric characteristics in coastal wetlands of Beibu Gulf,which were relatively minor.After using imazapyr to control S.alterniflora,it should be monitored continuously for changes of soil pH,nitrogen and phosphorus.It was recommended to replant native mangrove plants timely.关键词
土壤生态化学计量特征/咪唑烟酸/互花米草/北部湾Key words
soil ecological stoichiometric characteristic/imazapyr/Spartina alterniflora/Beibu Gulf分类
农业科技引用本文复制引用
李惠强,张继辉,韦海航,梁萍,田红灯,杨景竣,刘秀..咪唑烟酸治理互花米草对北部湾滨海湿地土壤生态化学计量特征的影响[J].广西林业科学,2025,54(5):488-495,8.基金项目
广西重点研发计划项目(桂科AB23026057) （桂科AB23026057）
中央财政林草科技推广示范项目([2023]TG28号) （[2023]TG28号）
广西林业科技推广示范项目(2023GXLK07) （2023GXLK07）
