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Investigation on Fuzhou vegetable pollution and pollutant sources and its controll

QIU Xiao xuan 1,HUANG Dong feng 1,CAI Shunxiang 1,CHEN Feng 2, REN Zu gan 1,CAI Yuan cheng 2 (1 Research Institute of Soil and Fertilizer,Fujian Academy of Agricultural Sciences, Fuzhou 350013,China;2 General Station of Rural Resources an  
Average content of nitrate in 16 kinds of examed vegetables was 2 76 timcs as much as that of the world health standard,but that of nitrite was normal.The average content of 4 types of heavy mental in 4 kinds of examed vegetables:copper was normal,lead was beyond the standard,cadmium and chrmiurn in one kind of them were normal,Pesticide residues in 11 kinds of examed vegetables:8 kinds were normal,3 kinds were beyond the standard Applying high dose of chemical N fertilizer and applying fertilizer unproperly were the direct reasons of high accumulation of nitrate in vegetable High accumulation of heavy mental in vegetable had a close relation with the pollutants remaining in irrigatation water,vegetable farm soil and rubbish.The reasons of high sidues of pesticide in vegetable include applying high dose of pesticide and high toxity and residues of pesticide Many approaches may be applied to bring down the content of nitrate,hcavy mental and pesticide in vegetable,such as,avoid using nitre nitrogen,controlling the dose of chemical nitrogen,combining application of chemical fertilizers with organicones,using nitrifying inhibitor and lime,Na 2S,biological pestcide,etc
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