Using Bio-Fertilizer as Alternative of Mineral Fertilizer at Cauliflower and Cabbage Crops

Abstract

A screen house experiment at Central Laboratory for Agricultural Climate (CLAC) was carried out to investigate the effect of applied bio-fertilizer on vegetative growth, productivity and chemical contents of cauliflower (Brassica oleracea var. botrytis c.v. Balady) and cabbage (Brassica oleracea var. capitata c.v. Ganzoury), which transplanting at 21^th November (as late transplanting date) 2019/20 and 2020/21 seasons, and non-using mineral fertilizer. This investigation was arranged in randomized block design with three replications and three application from bio-fertilizer were done (T₁) soaked seedling for two hours at specialized liquid media of (Azospirillum lipoferm, Azotobacter choococcum, Bacillus polymyxa and klebsiella pneumoniae) + liquid vinasse as a carrier before transplanting, (T₂) added liquid vinasse as a carrier of the previous free nitrogen fixing group to the surface after transplanting and (T₃) mixed T₁+T₂, plus, (T₄) control treatment (the recommended dose of mineral fertilizer). Generally, results indicated that, treatments of bio-fertilizer enhanced all tested soil properties and both crops parameters compared to control treatment. Furthermore, the highest values of all properties and parameters were obtained with mixed T₁+T₂ treatment. In addition, the highest net return and found to be more economical with highest cost:benefit ratio were determined.