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时间:2020-04-25
《两种城市污泥的小白菜效应研究-论文.pdf》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、天津农业科学inAgriculturalSciences2014。20(6):77—82·土壤肥料与节水灌溉两种城市污泥的小白菜效应研究任欣欣,卜玉山,张仙瑞,张曼,王婧,刘奋武,张吴平(山西农业大学资源环境学院,山西太谷030801)摘要:为确定太谷、农大两种污泥肥料在菜园土壤中的适宜施用量,通过单因素盆栽试验研究了太谷、农大2种不同城市污泥对小白菜产量、养分及重金属含量的影响。结果表明:适量施用污泥能增加小白菜产量,2种污泥的适宜施用范围不同,太谷污泥的适宜施用量为20g·kg土,农大污泥的适宜施用量为120g·kg土。施用污泥增加了小白菜氮、磷、钾养分含量和重金属含量。太谷污泥小白
2、菜N、P、K含量的增幅依次为N>K>P,农大污泥小白菜N、P、K含量的增幅依次为P>K>N。随着太谷污泥施用量的增加,小白菜cu、zn、As、Hg4种重金属含量均呈增加趋势。随着农大污泥施用量的增加,小白菜cu、zn含量呈增加趋势,As、Hg含量呈先增加后减少的趋势。小白菜重金属铜、锌、汞含量均是地上部低于地下部,而砷含量则为地上部高于地下部。在本试验的2种污泥不同施用量下,小白菜重金属含量均未超过国家蔬菜质量控制标准(GB2762-2005)。关键词:污泥;小白菜;产量;重金属中图分类号:$634.3文献标识码:ADOI编码:1O.3969~.issn.1006—6500.2014.0
3、6.0l9EfectsofTwoKindsofSewageSludgeonPak-choiRENXin-xin,BUYu-shan,ZHANGXian-rui,ZHANGMan,WANGJing,LIUFen—WU,ZHANGWu—ping(CollegeofResourcesandEnvironment,ShangxiAgriculturalUniversity,Taigu,Shanxi030801,China)Abstract:ApotcultureexperimentwasconductedtostudytheefectsofTaiguandNongdasewagesludgeon
4、theyield,nutrientcon—tents,andheavymetalcontentofpak-choi.Theresultsshowedthatproperamountofsewagesludgeincreasedtheyieldofpak-choi,thesuitableapplicationoftwokindsofsewagesludgewasdifferent.Taigusewagesludgesuitableapplicationwas20g·kg一andNongdasewagesludgesuitableapplicationwas120g·kg一.Theconte
5、ntsofnitrogen,phosphorus,potassiumandheavymetalinpak—ehoiwereincreased.Theincreaseofnitrogen,phosphorus,potassiuminpak-choiwasN>K>PbyapplyingTaigusewagesludgeandtheincreaseofnitrogen,phosphorus,potassiuminpak—choiwasP>K>NbyapplyingNongdasewagesludge.ThecontentsofCu,Zn,As,Hginpak-choiwereincreased
6、astheincreasedapplicationofTaigusewagesludge.ThecontentsofCu,Zninpak-choiwerein—creasedandAs,Hginpak-choiweredecreasedastheincreasedapplicationofNongdasewagesludge.ThecontentsofCu,ZnandHginundergroundpartofpak-choiwerehigherthanthatinabovegroundpartandthecontentsofAsinabovegroundpartwashigherthan
7、thatinundergroundpart.Inthisexperiment,thecontentsofCu,Zn,As,Hginpak-choiwereallundertheacceptablerangeas-cordingtonationalvegetablesafetystandards(GB2762-2005).Keywords:sewagesludge;pak—choi;yield;heavymetal随着我国城市化进程的
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