城市雨水对生菜产量品质与重金属含量的影响

作为都市农业灌溉用水,城市雨水对农产品食品安全和营养品质的影响深受关注.论文收集自然雨水(T1)、屋顶雨水(T2)和路面雨水(T3),静置沉淀后配置营养液进行水培生菜种植,测量生物产量、生理指标(叶绿素含量、净光合速率、根系活力)、营养指标(可溶性糖、可溶性蛋白、维生素C、硝酸盐)和元素含量(Ca、Fe、Mg、Zn、As、Cd、Pb),结果表明:城市雨水重金属含量低于国家标准,可以作为农业灌溉用水;雨水栽培生菜比自来水栽培生菜长势弱、产量低,路面雨水栽培生菜产量最低,单株干质量仅为3.57 g;雨水降低了生菜叶绿素含量和净光合速率,提高了生菜根系活力,屋顶雨水生菜和路面雨水生菜根系活力分别为3...

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Bibliographic Details
Published in农业工程学报 Vol. 33; no. z1; pp. 348 - 354
Main Author 穆大伟 张睿 李长伟 李艳荣 田立波 王兰英
Format Journal Article
LanguageChinese
Published 海南大学土木建筑工程学院,海口 570228%天津大学建筑学院,天津,300072%浙江大学生物系统工程与食品学院,杭州,310058%海南大学土木建筑工程学院,海口,570228%海南大学园艺园林学院,海口,570228%海南大学环境与植物保护学院,海口,570228 2017
天津大学建筑学院,天津 300072
Subjects
重金属;品质调控;作物;食品安全;城市雨水;生菜;生理指标
品质调控
quality control
heavy metals
食品安全
作物
crops
lettuce
重金属
food safety
生菜
urban rainwater
生理指标
physiological index
城市雨水
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ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2017.z1.052

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Summary:作为都市农业灌溉用水,城市雨水对农产品食品安全和营养品质的影响深受关注.论文收集自然雨水(T1)、屋顶雨水(T2)和路面雨水(T3),静置沉淀后配置营养液进行水培生菜种植,测量生物产量、生理指标(叶绿素含量、净光合速率、根系活力)、营养指标(可溶性糖、可溶性蛋白、维生素C、硝酸盐)和元素含量(Ca、Fe、Mg、Zn、As、Cd、Pb),结果表明:城市雨水重金属含量低于国家标准,可以作为农业灌溉用水;雨水栽培生菜比自来水栽培生菜长势弱、产量低,路面雨水栽培生菜产量最低,单株干质量仅为3.57 g;雨水降低了生菜叶绿素含量和净光合速率,提高了生菜根系活力,屋顶雨水生菜和路面雨水生菜根系活力分别为3.17和4.08 mg/(g·h),雨水栽培生菜的根冠比大于自来水生菜;雨水栽培生菜蛋白质、糖类和Vc含量不比自来水栽培生菜低,自然雨水生菜蛋白质质量分数4.97 mg/g,路面雨水生菜可溶性糖含量1.00%,路面雨水生菜Vc含量1.52 mg/g,分别为各项指标的最高值;供试生菜硝酸盐含量分别为5.62、5.48、6.04和7.04 mg/g,都超过了国家标准3.00 mg/g,这与试验采用1倍剂量营养液和采用硝酸调节pH值有关;雨水生菜有益元素Ca、Mg含量高于自来水生菜,Fe含量低于自来水生菜,雨水生菜总体品质略好于自来水生菜;自来水、自然雨水、屋顶雨水和路面雨水栽培生菜含As量分别为5.83、4.10、4.53和4.60μg/kg,含Cd量分别为0.76、0.78、2.59和1.37μg/kg,含Pb量分别为102.37、118.63、151.53和123.37μg/kg,远小于国家限量值,满足食品安全要求.总之,利用城市雨水作为都市农业灌溉用水,作物长势弱,产量低,但营养品质略好,食品安全,将城市雨水作为都市农业灌溉用水是可行的.
Bibliography:11-2047/S
Mu Dawei[1];Zhang Rui[2];Li Changwei[3];Li Yanrong[4];Tian Libo[5];Wang Lanying[6]
Rainwater has become a big problem of the city, because rainwater led to urban waterlogging, affect urban transport. Urban waterlogging is also a kind of hidden danger for urban residents. At the other side, government spends a lot of money to meet municipal water demand, for example the South-to-North Water Transfer Project. Many cities land subsidence caused by groundwater exploitation. Urban agriculture which used rainwater as irrigation water is an effective way for urban rainwater as resources. The safety of urban agricultural products irrigated by rainwater is attention focus, because urban rainwater is polluted by automobile exhaust, asphalt, cement and so on. This paper study the food safety and nutrient quality of lettuce irrigated by urban rainwater aims to explore the feasibility of urban rainwater as urban agricultural irrigation water. A hydroponics experiment was carried out from October 2014 to January 20
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2017.z1.052