Abstract:Effects of manure/fertilizer ratio on growth and yield of tomato growing in a greenhouse were studied under greenhouse cultivation in South Jiangsu.The experiment was designed to have 5 treatments,Treatment 1,2,3,4 and 5 with manure-N accounting for 0%,30%,50%,70% and 100% of total N,respectively,in fertilization,and CK (no fertilization).Results showed application of composted pig manure significantly increased stem diameter,number of fruit branches,number of fruits,and biomass of shoots of the tomato.Stem diameter increased by 16.8%~27.4% and the number of fruits by 32.1%~53.6%,over those grown in Treatment 1,but the application did not have much effect on plant height,number of leaves and height of the first fruit-setting branch.Tomato yields in Treatments 2,3,4 and 5 were 26.6%~45.6% higher over that in Treatment 1,but not much difference was found between the manure treatments.With the rise in manure percentage in N fertilization,the percentage of fruits set in the early-middle period decreased and the percentage of deformed fruits increased.However,in Treatment 2,the yield was the highest,being 69.9 t/hm2 and the percentage of fruits set in the early-middle period also the highest,which demonstrated that 30% of manure-N in N fertilization was a proper ratio for tomato growth.With basal application of composted pig manure and chemical fertilization plus sidedressing of some chemical fertilizer, some irrigation was enough to enable the greenhouse-medium to supply adequate nutrients for tomato to grow for 107 days and yield 60.7~69.9 t/hm2 of fruits.