聚乙烯微塑料对连续三季小白菜生长发育及品质的影响

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Abstract：InodertoexplorethesponsecharacteristcsofCescabbage（BrasicachinesisL）toigdensitypolyetylee（HDE） microplasticsstressapotexperimentwasconductedoverthreeconsecutivegrowingseasons.Thestudyexaminedtheefectsofdieret concentrations of HDPE microplastics（2.50，5.00，10.00，20.00 ΣΣg kg-1 ），with particle sizes ranging from 48μm to 150μm ，on the growth and nutritionalualitesabgesellssilutravlbilityTultssodtatEicroplastiigniftly the growth and photosynthesis of Chinese cabbage.The fresh weightofChinese cabbage decreased significantly by 15.31%-31.48% in first season and by 12.16 % -29.53 % in the second season. The total content of chlorophyllb and chlorophyll a+b decreased by 45.45%-84.47% and 33.22%-70.18% ，respectively.Additionally，the nutritional qualityofChinesecabbage inthe threeseasons alsochangedsignificantly. The starch content decreased by 6.95 % 1 61.60% ，the soluble sugar content increased by 4.02% 一 134.14% ，and the manganese content of the plant decreased by 69.15% （in the second season）.In addition，the changes of growth and quality indexes of Chinese cabbage under the influenceofcroplasticsweresignificantlyoelatedwiththeductioofavailableangansecontetinsoilandmangaeseotetn Chinesecabbgeplants.Ingeneral，theefectsofHDPEmicroplasticsonthegrowthandqualityofChinesecabbageicreasedwiththe increaseiconcentrationbutdecreasedwiththeextensionofplantingseaso.Thechangeinmanganeseavailabilityinsoilandtedirect effectof microplastics oncroproots maybethe important reasons influencing the growthandqualityofChinesecabbage.

Keywords：microplastics; concentration; quality of Chinese cabbage; persistent effect

微塑料作为一种环境新污染物，由于具有强生物毒性、环境持久性、生物富集性，在国内外研究者中引起了广泛关注[1-2]。（剩余16985字）