Abstract:

he objective of this study was to determine the effect of applying biogas slurry from swine farms on tomato fruit quality in soilless cultivation. Four treatments (T1, T2 and T3 representing mixed irrigation with a ratio of fresh water to slurry of 1:1, 2:1 and 3:1, and T4 for alternate irrigation of fresh water and slurry) with a control were set to study the effects of irrigating biogas slurry on tomato quality. Vc, reducing sugar, crude protein, soluble solid, total copper, total zinc, nitrate and nitrite of tomato fruits were tested, and results showed that Vc content of tomato fruit increased while reducing sugar content did not in slurry treatments. Crude protein and soluble solid contents of tomato fruit in T4 improved while total copper, total zinc, nitrate and nitrite contents did not increase. It concluded that T4 was suitable for improving tomato fruit quality while ensuring food safety.