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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Ambar Pertiwiningrum1, Ngesti Hidayah2 and Siti Syamsiah3
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DOI:10.17265/2161-6256/2016.03.001
Affiliation(s)
1. Faculty of Animal Science, Universitas Gadjah Mada (UGM), Jalan Fauna 3, Bulaksumur, Yogyakarta 55281, Indonesia
2. Graduate School, Universitas Gadjah Mada (UGM), Jl. Teknika Utara, Pogung, Yogyakarta 55281, Indonesia
3. Faculty of Chemical Engineering, Universitas Gadjah Mada (UGM), Jl. Grafika 2, Yogyakarta 55281, Indonesia
ABSTRACT
Processing cow manure into biogas is a solution to reduce air pollutant, because it reduces
the smell of the manure up to 70%. Besides producing biogas, the sludge of
biodigester can also serve as solid and liquid fertilizer. The solid fertilizer
can be used as carrier of entomopathogenic fungi to
control the pest which lives underground. The research aimed to investigate the
benefits of biodigester sludge as fertilizer and carrier of entomopathogenic fungi (Cordyceps sp.) to control white grub pest. The use of organic fertilizer and
pesticide in the cultivation can minimize the environmental hazard. The method
used in the study was completely randomized design with four treatments, which
were the addition of Cordyceps sp. corn media as much as 0, 10, 20 and 30 g/kg of sludge. Every addition was repeated three times
to corn planted in a tub. To examine the effect of the treatments, the data were analyzed with ANOVA and Duncan test was applied when differences occurred between treatments. The results of the research showed that
the nutrients contained in the manure which had been processed into biogas were
not lost. The plants cultivated in the planting medium supplemented with sludge
grew healthier, bigger,
taller and had stronger and longer roots. On the contrary, the plants cultivated without sludge addition were vulnerable to white
grub attack. The Cordyceps sp., which
was added into the sludge, was effective to
control the white grub. The concentration of Cordyceps sp. as much as 20 g/kg of sludge in corn
planting medium was the most effective concentration to control white grub
pest.
KEYWORDS
Sludge, pollution, fertilizer, organic pesticide, Cordyceps sp..
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