7K Fytianos,P Zarogiannis. Nitrate and nitrite accumulation in fresh vegetables from Greece[J]. Canadian metallurgical quarterly,1999, 62 (2): 187-192.
8Pasda G,Hahnldel R,Zerulla W. Effect of fertilizers with the new nitrification inhibitor DMPP (3,4-dimethylpyrazole phosphate) on yield and quality of agriculture and horticultural crops[J]. Boil Fertil Soils,2001,34(2):85-97.
9Zerulla W,Pasda G,Hahnldel R,et al. The new nitrification inhibit or DMPP (ENTEC) for use in agriculture and horticultural crops anoverview. Plant nutrition Food security and sustain ability of agro-ecosyst ems[M]. Dordrecht:Kluw er Acadenic Publishers,2001: 754-755.
