Use of CO_2 Gas-fertilizer from Biogas for Tomato Planting

Effects of different CO2 concentration in greenhouse on tomato quality and yield were studied.The result indicated that tomato yield and quality were increased with different CO2 concentration in greenhouse.With the 1500 μL·L-1 of CO2 in greenhouse,the single fruit weight,the yield and fruit number per plant were the largest.The yield was increased by 43%,single fruit weight increased by 103%,and tomato fruit number per plant increase by 52% comparing with CK.