The Effects of Irrigation with Diluted Biogas Slurry on Growth, Yield and Fruit Quality of Tomato

【Objective】 Irrigation is an environment-friendly way to treat liquid wastes of biogas digesters, but how to reduce its detrimental impact on soils and improve the use of its nutrients is critical to its sustainable application in agricultural production. The purpose of this paper is to study the impact of irrigation with diluted biogas slurry on growth, yield and fruit quality of tomato. 【Method】 The experiment was conducted in a greenhouse. Biogas slurry was diluted by freshwater at volumetric ratio of 1/4; it was then used to irrigate the crop at one of the following growth stages: seedling stage (P1), blooming and fruiting stage (P2), fruit expansion stage (P3) and fruit ripening stage (P4). Irrigation with freshwater was taken as the control (CK). For each treatment, we measured the growth physiology, nutritional quality of the fruits, as well as sugar accumulation. 【Result】 Irrigation with the diluted biogas slurry promoted growth, dry matter accumulation, yield and fruit quality of the tomato. Compared