RESPONSE OF CELERY PLANT(Apium graviolens L.) TO THE REDUCTION OF INORGANIC FERTILIZER WITH DECANTER CAKE USAGE
2019
Duaja, Made Deviani
The purpose of this research was to find out the response of celery plants when inorganic fertilizers are reduced and substituted with oil palm decanter cake mill waste. This research was conducted at Farmer’s Field in Tangkit Baru Village, Sungai Gelam Sub-district, Muaro Jambi Regency, uses Randomized Block Design with one factor ie decanter cake and inorganic fertilizer (NPK) consists of 7 levels, namely: 100% NPK Fertilizer (as recommended 200 kg urea / ha, 150 kg / ha SP-36, 200 kg / ha KCl), decanter cake 15 ton / ha, 20 ton / ha, decanter cake 15 ton / ha + 75% dose of NPK (25% reduction of NPK dosage), decanter cake 15 ton / ha + 50% dose of NPK (50% reduction of NPK dose), decanter cake 20 ton / ha + 75% dose of NPK (25% reduction NPK dose), decanter cake 20 ton / ha + 50% dose of NPK (50% reduction of NPK dose). The parameters observed were plant height, number of leaves, number of stems per hill, fresh weight per plant and plant growth rate. The results showed, that plant response to the reduction of 50% inorganic fertilizer substituted with decanter cake 15 tons per hectare gave the best celery fresh weight , leaves number and the highest celery stems number. For plant height parameters and the highest plant growth rate indicated that there was no significant difference between 15 tons per hectare and 20 tons per hectare of decanter cake at 50 percent reduction of inorganic fertilizers.
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