Abstract: On rootstocks K326,Yunyan97,Keke137,Binchuanlanhuayan,Honghuadajinyuan was grafted.Taking ungrafted Honghuadajinyuan seedling as the control,plot experiments were carried out under nitrogen fertilizer levels of 0,3,5 and 7 kg to compare their agronomic traits,disease resistance,economic characteristics and chemical quality.The results showed that at the nitrogen fertilizer level of 5 kg,Honghuadajinyuan/Yunyan97 grafted seedling were better than the control in terms of chemistry,yield,quality and resistance to root knot nematode disease,which also increased income by 276 yuan/hm².