In order to explore soil nitrogen and phosphorus accumulation,vegetable yeild and quality influenced by reduction and optimization of nitrogen fertilizer application in peri-urban,two field experiments were carried out in vegetable fields to investigate the environmental and agronomic effects.N was reduced by 20% with following optimized fertilization strategies,referred to as slow-release urea(80%N(CRU));urease/nitrification inhibitors(80%N+QD);soil conditioner(80%N+SC),respectively.The results showed that...