傳(chuan)統(tong)農(nong)業(ye)主(zhu)張(zhang)蔬(shu)菜(cai)田(tian)要(yao)大(da)量(liang)施(shi)用(yong)有(you)機(ji)肥(fei)
，甚(shen)至(zhi)認(ren)為(wei)有(you)機(ji)肥(fei)越(yue)多(duo)越(yue)好(hao)。但(dan)根(gen)據(ju)近(jin)年(nian)來(lai)各(ge)地(di)的(de)多(duo)項(xiang)試(shi)驗(yan)結(jie)果(guo)表(biao)明(ming)，適(shi)當(dang)增(zeng)施(shi)有(you)機(ji)肥(fei)能(neng)有(you)效(xiao)地(di)控(kong)製(zhi)蔬(shu)菜(cai)硝(xiao)酸(suan)鹽(yan)超(chao)標(biao)，盲(mang)目(mu)增(zeng)施(shi)有(you)機(ji)肥(fei)則(ze)會(hui)造(zao)成(cheng)蔬(shu)菜(cai)硝(xiao)酸(suan)鹽(yan)超(chao)標(biao)。

  蔬shu菜cai中zhong的de硝xiao酸suan鹽yan含han量liang過guo高gao對dui人ren體ti可ke能neng造zao成cheng直zhi接jie危wei害hai，更geng危wei險xian的de是shi硝xiao酸suan鹽yan在zai微wei生sheng物wu作zuo用yong下xia極ji易yi還hai原yuan成cheng亞ya硝xiao酸suan鹽yan。亞ya硝xiao酸suan鹽yan是shi一yi種zhong有you毒du物wu質zhi，它ta可ke直zhi接jie使shi人ren中zhong毒du缺que氧yang，嚴yan重zhong者zhe可ke致zhi死si亡wang。亞ya硝xiao酸suan鹽yan還hai能neng與yu人ren體ti消xiao化hua道dao中zhong的de次ci級ji胺an結jie合he形xing成cheng強qiang致zhi癌ai物wu亞ya硝xiao酸suan胺an。因yin此ci
，必bi須xu嚴yan格ge控kong製zhi蔬shu菜cai中zhong的de硝xiao酸suan鹽yan含han量liang，以yi確que保bao食shi用yong者zhe的de安an全quan。蔬shu菜cai田tian優you質zhi農nong家jia肥fei的de施shi用yong量liang應ying控kong製zhi在zai3000~5000千克/每畝
，一般不宜超過6000千克/每畝。