논문 상세보기
pp.85-101
This experiment was conducted to develop liquid fertilizer for leaf vegetable using the agricultural by products such as dry chicken dropping, bone meal, rice bran, soybean oil cake and fish meal. Combination of 50% dry chicken dropping, 30% bone meal and 20% rice bran among several combinations of by products was selected as materials for liquid fertilizer of head lettuce and cabbage. 50㎏ of materials with combination selected got mixed to 200ℓ of water, which kept under room temperature in greenhouse. EC and pH of fertilizer was stabilized after 35 days. On the decrease of bad smell during fermentation, addition of materials such as bioceramics, woody vinegar and active charcoal was not effected. And on rapid fermentation, addition of microorganisms and sugar had a little effect, but decreased the content of inorganic nutrients. Fertigation of liquid fertilizer developed on cabbage by dropping made head weight increased by 0.9㎏ per plant and nitrate content decreased by 276ppm in comparison with chemical fertilizer which was 3.5㎏, and 2,426ppm, respectively. By use of organic liquid fertilizer developed in this experiment, yield of cabbage could be more obtained by 26% than in use of chemical fertilizer and income by 24%.
