Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Food Science》 2014-14
Add to Favorite Get Latest Update

Nitrate and Nitrite Contents and Correlations of Vegetables with Soil in Chongqing

YANG Yun;WANG Chong-li;XU Wei-hong;JIANG Ling;ZHOU Kun;LIU Jun;ZHANG Ming-zhong;WANG Zheng-yin;XIE De-ti;College of Resources and Environmental Sciences,Southwest University;  
Nitrate contents of 73 samples of 19 species of vegetables from three categories collected from four farmers' markets in Chongqing municipality were investigated. The contents of nitrate and nitrite in vegetables from 13 major vegetable planting bases in Chongqing were analyzed and correlated with those of soil samples from these planting bases. The results showed that significant differences in nitrate contents were observed among different vegetable species and different parts of the same species,and the decreasing order was leaf vegetables(X = 1 619.73 mg/kg) solanaceous vegetables(X = 1 327.67 mg/kg) allium vegetables(X = 1 078.39 mg/kg); and lettuce leaves(X = 1 567.91 mg/kg) lettuce stems(X = 1 871.62 mg/kg). The content of nitrate in all leaf vegetables exceeded level I standard,showing a pollution index up to 9.09. About 81.3% of solanaceous vegetables and 87.5% of allium vegetables exceeded level I standard,and pollution index was up to 8.85 and 6.56,respectively. Significant differences in nitrate nitrogen were found among different vegetable species and among different parts of the same species from 13 vegetable planting bases,and the descending order was radish leaves(X = 745.97 mg/kg) lettuce stems(X = 730.88 mg/kg) lettuce leaves(693.32 mg/kg) cabbages(X = 617.63 mg/kg) radish roots(X = 575.74 mg/kg). Significant differences in nitrate nitrogen were also observed in soils from the vegetable bases,and the decreasing order was lettuce-growing soil(X = 75.24 mg/kg) cabbage-growing soil(X = 47.05 mg/kg) radish-growing soil(X = 33.42 mg/kg). Significant linear correlation of nitrate contents was found between vegetables and soils(y = 407.872 + 4.769x). The contents of nitrite in vegetables and soils from 13 vegetable bases were low,without showing significant differences. Moreover,no significant correlation of nitrite contents was found between vegetables and soils.
【Fund】: 国家现代农业产业技术体系建设专项(Nycytx-35-gw16);; “十一五”国家科技支撑计划项目(2007BAD87B10)
【CateGory Index】: S63;S481.8
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved