Yacobus Sunaryo
Agricultural Faculty of Sarjanawita Tamansiswa University Yogyakarta
ABSTRACT
This research dealing with the effect of vermicompost and bokashi on nutrient content of mustard green and lettuce was conducted in July 2009 until January 2010. This experiment used factorial 5 x 2 arranged in completely randomized design with three replications. The first factor was the dosage of organic fertilizers that consisted of 5 levels: (1) P0: control (without organic fertilizer, used NPK in recommended dosage). (2) P1: vermicompost in low dosage, (3) P2: vermicompost in high dosage, (4) P3: bokashi in low dosage, (5) P4: bokashi in high dosage. The second factor was the kinds of vegetable that consisted of 2 levels: (1) lettuce, and (2) mustard green. Observations were objected on growth parameters such as total leaf number, leaf area, and shoot dry weight. Whereas, the parameters of nutrient content that observed were content of protein, vitamin C, Fe, and carotene. Results of the experiment indicated that mustard green and lettuce treated by vermicompost as well as bokashi had better growth than that treated by NPK fertilizer. Application of vermicompost as well as bokashi resulted protein content that did not significantly different compare to NPK application on mustard green as well as on lettuce; and also resulted carotene content did not significantly different on mustard green. Application of vermicompost as well as bokashi produced higher vitamin C on mustard green as well as on lettuce than that treated by NPK fertilizer. Application of vermicompost as well as bokashi produced lower Fe content on mustard green as well as on lettuce; and also resulted lower carotene content on lettuce than that treated by NPK fertilizer. Mustard green had higher nutrient content than that of lettuce on all treatments.
Keywords: vermicompost, bokashi, mustard green, lettuce