Ecological and economic analysis of planting greenhouse cucumbers with anaerobic fermentation residues

Abstract In this study, the effect of different fertilizers on the nutritional quality, sanitary quality and the yield of greenhouse cucumbers were analyzed by comparative experiments with chemical fertilizer and anaerobic fermentation residues (biogas fertilizer). Particularly the properties of bio-fertilizer and diseases and pests inhibition of biogas fertilizer were demonstrated and its comprehensive benefits were evaluated. The results show that compared with chemical fertilizer, biogas fertilizer increased the dry matter, solids, reductive sugar, Vc, soluble protein of cucumbers by 4.62%, 4.08%, 29.05%, 20.83%, 10.85% respectively; the chlorophyll of leaf was 9.18% higher and the incidence of aphids and mildew 20% and 25% lower respectively. After calculation, the yield was raised by 1323.4 kg/mu, an increase of 15.90%. The income was increased by 22839.8 Yuan/mu and the output/input ratio reached 63.75:1, which is 3.77 times than that of chemical fertilization. Results indicated that biogas fertilizer can effectively reduce diseases and pests, bring good economic, social, and environmental benefits, and promote the low-carbon circular development of crop farming.