PENGARUH PUPUK ORGANIK CAIR TERHADAP PERTUMBUHAN, HASIL DAN KUALITAS TIGA VARIETAS BUNGA KOL (Brassica oleraceae var. botrytis L.)

Abstract

Cauliflower (Brassica oleracea var. Bortrytis L.) plant is one of vegetable commodities that have commercial value and high prospects. The need of vegetables nowadays increases higher and higher in line with public awareness of health. At this time many cauliflower farmers use chemical fertilizers excessively, so this gives negative impacts on the condition of agricultural land. Such conditions, if done continuously, can damage the environment, so it needs solutions by the use of non-chemical fertilizer, one of which is applying the use of liquid organic fertilizer. Therefore, it is necessary to conduct an experiment to answer the existing problems, through the research on the effect of liquid organic fertilizer on three varieties of cauliflower. Giving liquid organic fertilizer is expected to produce inorganic chemicals residue-free cauliflower. This experiment aimed to evaluate the response of 3 varieties of cauliflower to liquid organic fertilizer and to determine the effect of concentration of liquid organic fertilizer and the interaction of liquid organic fertilizer concentrations with three varieties of cauliflower on growth, yields and quality of cauliflower. The experiment was conducted at Experimental Land owned by the University of Jember in the area of Agrotekno Park Jubung in May until complete. This experiment used factorial randomized block design (3 x 4) with three replications. The first factor was the concentration of liquid organic fertilizer which consisted of 0 ml/l of water (K0), 5 ml/l of water (K1), 10 ml/l of water (K2) and 15 ml/l of water (K3). The second factor was varieties of cauliflower which consisted of Snow White variety (V1), Cauliflower variety (V2) and Profita variety (V3). Data resulted from the experiment were analyzed by analysis of x variance, followed by Duncan's multiple range test with 5% level if there was a significant effect. The results of experiment showed that the interaction between concentration of liquid organic fertilizer and varieties of cauliflower increased growth, yields and quality of cauliflower, with a combined treatment of liquid organic fertilizer, and the concentration of 10 ml/l of water on cauliflower varieties (K3V2) was the best combination for flower diameter, and liquid organic fertilizer concentration of 15 ml/l of water on Profita variety (K3V3) was the best combination for flower weight. The concentration of liquid organic fertilizer increased growth, yields and quality of cauliflower with a concentration of 15 ml/l of water as the best concentration. Type of varieties had response to growth, yields and quality of cauliflower with best response generated by Profita variety.