STUDIES ON THE NITRATE CONTENT OF VEGETABLES AT SOURCE AND UNDER DIFFERENT METHODS OF STORAGE AND ENVIRONMENT
Publication Date : 31/12/2016
Studies on the nitrate content of vegetables at source and under different methods of storage and environment under Manipur condition was taken up to study in five district of Manipur 1) Imphal East, 2) Imphal West, 3) Bishnupur, 4) Thoubal and 5) Senapati districts. Random sampling was adopted due to the unavailability of requisite no. of farmers in each village as the particular crop was not cultivated widely. Fudge and Truman methods with some modification was used for estimation of Nitrite and nitroxylenol method of Lip and Dolberg for Nitrate. Fresh vegetables contain higher levels of Nitrate compare to Nitrite. However the vegetables under storage condition contain higher values of Nitrite compare to Nitrate. Wide variation of nitrate content in freshly harvested sample may be due to difference in cultivation practices. Rulkawska B reported that significantly lower nitrate content in patoto was observed in ecological farm and almost twice higher in conventional farm. Decrease in Nitrate content after storage may be due to the reduction of Nitrate by micro-organism during storage into Nitrite. This finding was similar with the finding of Chung J.C. et al.