The effect of organic fertilizer and mount Merapi volcanic ash to land rehabilitation

Abstract

This study aims to determine the effect of adding organic fertilizer to the ex-eruption of Mount Merapi by using an indicator plant of peanut (Arachis hypogaea L.) Gajah variety in order to land rehabilitation. The treatment used was the addition of volcanic ash and organic fertilizer. The organic fertilizer used comes from chicken manure. The selection of chicThis study aims to determine the effect of adding organic fertilizer to the ex-eruption of Mount Merapi by using an indicator plant of peanut (Arachis hypogaea L.) Gajah variety in order to land rehabilitation. The treatment used was the addition of volcanic ash and organic fertilizer. The organic fertilizer used comes from chicken manure. The selection of chicken manure as organic fertilizer uses the principle of sustainability, where in the research area there are many chicken farmers so that the presence of chicken manure is easy and cheap to obtain. The design of this study was based on 1 block completely randomized 2 factorial design which was repeated 3 times. With the addition of volcanic ash and chicken manure, 10 tons/ha, 20 tons/ha and 30 tons/ha, respectively. Plant parameters observed were: (1) plant height, (2) fresh weight and dry weight of roots, (3) Shoots' fresh and dry weight, (4) fresh weight and dry weight of pods, (5) Seeds' fresh weight and dry weight, (6) number of seeds and pods/plant, and (7) N uptake and root nodule number. The findings indicated that chicken manure increased plant height from 1 to 5 weeks after planting. The application of 30 tons/ha of chicken manure has raised the height of plants. The addition of chicken manure tends to enhance the peanut seeds' dry weight.ken manure as organic fertilizer uses the principle of sustainability, where in the research area there are many chicken farmers so that the presence of chicken manure is easy and cheap to obtain. The design of this study was based on 1 block completely randomized 2 factorial design which was repeated 3 times. With the addition of volcanic ash and chicken manure, 10 tons/ha, 20 tons/ha and 30 tons/ha, respectively. Plant parameters observed were: plant height (cm); fresh and dry weight of shoots (g/plant); fresh weight and dry weight of roots (g/plant); number of pods/plant; fresh weight and dry weight of pods (g/plant); number of seeds/plant, fresh weight and dry weight of seeds (g/plant); N uptake; and number of root nodules. The results showed that chicken manure tended to increase plant height at the age of 1 WAP to 5 WAP. Treatment of 30 tons/ha of chicken manure will increase plant height. The addition of chicken manure also tends to increase the dry weight of peanut seeds.