欢迎来到天天文库
浏览记录
ID:39275207
大小:2.48 MB
页数:4页
时间:2019-06-29
《生态沟渠中4种水生植物的氮磷积累效应》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、贵州农业科学2016,44(4):147~149GuizhouAgriculturalSciences[文章编号]1001-3601(2016)04-0181-0147-03生态沟渠中4种水生植物的氮磷积累效应12刘燕,夏品华(1.贵州省生物研究所,贵州贵阳550009;2.贵州师范大学,贵州省山地环境信息系统和生态环境保护重点实验室,贵州贵阳550001)[摘要]为探明水生植物的氮磷积累规律,以贵州某生态沟渠中4种优势水生植物(菖蒲、黄菖蒲、水葱、美人蕉)为试验对象,研究各植物生物量及不同器官氮、磷积累量的变化。结果表明:随着生长时期的推进,4种植物生物量逐渐增加,尤其是
2、夏季过后地上部生物量增加明显,秋季达最大值,至冬季后又逐步降低。4种植物总氮、总磷含量差异明显,菖蒲总氮与总磷含量最高,分别为41.26g/kg和11.22g/kg,美人蕉最低,分别为21.22g/kg和7.14g/kg;随着时间的推移,4种植物的地上部分(茎叶)和地下部分(根)氮、磷积累量均逐步增加,至秋季达最大值;10月是多数水生植物生物量和体内氮、磷含量最高的时段,可通过收割去除这部分氮、磷;4种植物中,菖蒲的氮、磷回收量最大(氮10.79kg、磷2.34kg),美人蕉最少(氮0.32kg、磷0.11kg),通过收割4种优势植物,2km河段总共可回收氮22.87kg和
3、磷4.98kg。[关键词]水生植物;氮;磷;积累效应[中图分类号]S682.32[文献标识码]ANitrogenandPhosphorusAccumulationinMacrophytesinEcologicalDitch12LIUYan,XIAPinhua(1.GuizhouInstituteofBiology,Guiyang,Guizhou550009;2.GuizhouKeyLaboratoryforMountainousEnvironmentalInformationandEcologicalProtection,GuizhouNormalUniversity,Gu
4、iyang,Guizhou550001,China)Abstract:Inordertorevealthenitrogenandphosphorusaccumulationregularityofmacrophytes,fourdominanthydrophytes,Cannaindica,Irispseudacorus,ScirpustabernaemontaniandAcoruscalamuswereusedforwaterpurificationinecologicalditch.Theaccumulationamountsofbiomass,NandPindiffe
5、rentorgansoftheabovementionedplantswereanalyzedaroundayear.Results:Withthedevelopmentofgrowthperiod,fourkindsofplantbiomassincreasedgradually,especiallyabovegroundbiomassincreasedsignificantlyoverthesummer,andinautumnreachedthemaximum,thengraduallyreducedinwinter.AwiderangeofTNandTPcontent
6、sexistedindifferentplants,withthehighestTNcontentof41.26g/kgandthehighestTPcontentof11.22g/kginA.calamus.Besides,ThelowestTNcontentof21.22g/kgandthelowestTPcontentof7.14g/kginC.indica.WiththeincreasingofNandPaccumulationinabovegroundparts(stemandleaf)andtheundergroundpart(theroot),theNandP
7、accumulationgraduallyincreased,andreachedthemaximumvalueintheAutumn.AccordingtoaccumulationofTNandTP,hydrophytes’bestharvesttimewereOctober.Furthermore,theywerethehighestinA.calamus(N10.79kg,P2.34kg)andthelowestinC.indica(N0.32kg,P0.11kg),22.87kgNand4.98kgPcou
此文档下载收益归作者所有