The experiment was carried out to evaluate the effect of different organic fertilizers on growth and yield of Mukhi kachu. There were eight treatments consisting of T0: Control, T1: Cowdung @15t/ha, T2: Cowdung @7t/ha, T3: Poultrymanure @12t/ha, T4: Poultry manure @6 tha-1, T5: Mustard oil cake @10 tha-1, T6: Cowdung @ 12tha-1+ poultry manure @6tha-1 and T7: Compost @15tha-1 were used in this investigation. Different organic fertilizers had significantly influenced on most of the growth and yield components of Mukhi kachu. The plant height, number of leaves plant-1, number of suckers hill-1, the length and breadth of leaf blade, number of cormel hill-1, weight of corm, weight of cormel, yield of corm and cormel were the highest where poultry manures was applied. The yields of corms and cormels under T3 treatment were 23.90 and 41.80 t ha-1, respectively.
Key words: Mukhi kachu, organic fertilizer, yield.
Introduction Mukhi kachu (Colocasia esculenta L. Schott), member of the family Araceae is one of the important edible aroid in Bangladesh. It is a popular indigenous vegetable of Bangladesh. The world area under aroid is 1.40 million hectares with an annual production of 8.687 million metric tons of marketable product (FAO, 1999).In Bangladesh, the production of aroids during 2012-2013 was 239 thousand metric tons, (BBS, 2014). Use of organic fertilizers is essential for proper growth and development of Mukhi kachu. Organic fertilizer improves texture, structure, humus, aeration, water holding capacity and microbial activity of soil and thus helps to increase and conserve the soil productivity. Soil fertility status of the country has been declining day by day which is now becoming a very alarming issue for the scientists and policy makers (Bhuiyan, 2005). The use of inorganic fertilizer is hazardous to human health, the soil environment and also expensive. On the other hand, organic matter is useful in maintaining or increasing the organic substances or nitrogenous compounds in soil. In this reason, it is necessary to find out an effective organic fertilizer for the cultivation of Mukhi kachu without polluting the soil and the environment. Considering the above facts, the present study was undertaken to observe the effect of different types of organic fertilizers on growth and yield of Mukhi Kachu and find out the most effective organic fertilizer for cultivation of Mukhi kachu.