i ABSTRAK
Wardiman W. Katili, 2013. Pengaruh Residu Kombinasi Abu Vulkanik Merapi, Pupuk Kandang Sapi dan Tanah Mineral terhadap Sifat Kimia Media Tanam serta Bobot Kering Pupus Tanaman Jagung (Zea mays L.). Dibimbing oleh Nenny Nurlaeny dan Yuliati Machfud.
Penelitian ini dilakukan untuk mengetahui pengaruh residu kombinasi abu vulkanik Merapi (AVM), pupuk kandang sapi (PKS) dan tanah mineral Inceptisol (TM) terhadap pH, P2O5 potensial, P2O5 tersedia serta bobot kering pupus tanaman jagung (Zea mays L.). Penelitian ini dilaksanakan dari bulan Februari hingga Mei 2012 di rumah kasa kebun percobaan Fakultas Pertanian, Universitas Padjadjaran, Jatinangor, dengan ketinggian tempat ± 740 m dpl. Penelitian ini merupakan penelitian lanjutan menggunakan Rancangan Acak Kelompok faktor tunggal dengan sembilan perlakuan dan tiga kali ulangan. Perlakuan residu terdiri dari (I) 0% AVM + 50% PKS + 50% TM, (II) 40% AVM + 10% PKS + 50% TM, (III) 30% AVM + 20% PKS + 50% TM, (IV) 20% AVM + 30% PKS + 50% TM, (V) 10% AVM + 40% PKS + 50% TM, (VI) 40% AVM + 50% PKS + 10% TM, (VII) 30% AVM + 50% PKS + 20% TM, (VIII) 20% AVM + 50% PKS + 30% TM, (IX) 10% AVM + 50% PKS + 40% TM. Hasil penelitian menunjukkan bahwa residu kombinasi AVM, PKS dan TM memberikan pengaruh terhadap P2O5 potensial serta P2O5 tersedia, namun tidak berpengaruh terhadap pH serta bobot kering pupus tanaman jagung. Korelasi dan regresi antara P2O5 potensial dengan P2O5 tersedia menunjukkan bahwa semakin meningkat P2O5 potensial maka semakin meningkat pula P2O5 tersedia (r = 0,64), sedangkan korelasi dan regresi antara P2O5 tersedia dengan bobot kering pupus tanaman jagung menunjukkan bahwa semakin meningkat P2O5 tersedia maka semakin meningkat pula bobot kering pupus tanaman jagung (Zea mays L.) (r = 0,41).
ii ABSTRACT
Wardiman W. Katili, 2013. Residue Effects of Merapi Volcanic Ash, Cow Manure and Mineral Soil Combination on Media Chemical Properties and Dry Weight of Maize (Zea mays L.). Supervised by Nenny Nurlaeny and Yuliati Machfud.
This experiment was conducted to find out the residue effects of Merapi volcanic ash (MVA), cow manure (CM) and mineral soil (MS) combination on pH, potential P2O5, available P2O5 and dry weight of Maize (Zea mays L.). The experiment in a screen house was carried out from February until May 2012, in the field of Agricultural Faculty, University of Padjadjaran, Jatinangor at ± 740 m above sea level. The experiment was an advanced experiment used a Randomized Block Design which arranged in one factor, nine treatments and three replications. The nine residue treatments consisted of (I) 0% MVA+ 50% CM+ 50% MS, (II) 40% MVA+ 10% CM+ 50% MS, (III) 30% MVA+ 20% CM+ 50% MS, (IV) 20% MVA+ 30% CM+ 50% MS, (V) 10% MVA+ 40% CM+ 50% MS, (VI) 40% MVA+ 50% CM+ 10% MS, (VII) 30% MVA+ 50% CM+ 20% MS, (VIII) 20% MVA+ 50% CM+ 30% MS and (IX) 10% MVA+ 50% CM+ 40% MS. Results of this experiment showed that there were effects of residue of Merapi volcanic ash, cow manure and mineral soil combination on potential P2O5 and available P2O5, but it had no effects on pH and dry weight of maize. Correlation and regression between potential P2O5 and available P2O5 showed that the increase of potential P2O5 would increase P2O5 available (r = 0,64), whereas correlation and regression between available P2O5 and dry weight of maize showed that the increase of available P2O5 would increase dry weight of maize (r = 0,41).
