Study on effect of irrigation and fertilization on yield and fruit quality of greenhouse tomato

Under the condition of plastic mulching and drip fertigation,the effect of the irrigation upper limit and fertilization amount on tomato yield and some fruit quality indexes(Vc content,soluble sugar content,organic acid content and sugar-acid ratio) were studied by a plot experiment in greenhouse,and the results were analyzed and discussed.The results indicated that the effect of fertilization amount on the tomato yield was the maximal,and the interaction of the irrigation upper limit and fertilization amount was the second factor,the effect of the irrigation upper limit was no significant,the tomato yield was improved with the proper decrease of fertilization amount compared with the local conventional fertilization amount.The effect of the irrigation upper limit and fertilization amount on each index of tomato fruit quality was different,the quality of tomato fruit could improved by the proper increase of the irrigation upper limit and the decrease of the conventional fertilization amount significantly.To well coordinate the requirement of the tomato's yield and quality to irrigation and fertilization,the preferable irrigation and fertilization management mode of fertilization amount was N 286.88 kg·hm-2,K2O 286.88 kg hm-2,soil water suction of the irrigation upper limit and lower limit were respective pF 2.0(10 kPa) and pF 2.49(30 kPa).