i ABSTRAK
Solid Edhar Kamil, 2012. Pengaruh Residu Kombinasi Abu Vulkanik Merapi, Pupuk Kandang Sapi dan Tanah Mineral terhadap C-Organik, Kapasitas Pegang Air, Kadar Air serta Bobot Kering Pupus Tanaman Jagung (Zea mays L.). Dibimbing oleh Nenny Nurlaeny dan Emma Trinurani Sofyan.
Penelitian lanjutan ini dilakukan untuk mengetahui pengaruh residu kombinasi abu vulkanik Merapi (AVM), pupuk kandang sapi (PKS) dan tanah mineral Inceptisol (TM) terhadap C-organik, kapasitas pegang air, kadar air serta bobot kering pupus tanaman jagung (Zea mays L.). Penelitian dilaksanakan dari bulan Februari hingga Mei 2012 di dalam rumah kasa kebun percobaan Fakultas Pertanian, Universitas Padjadjaran, Jatinangor, dengan ketinggian tempat ± 740 m dpl. Penelitian lanjutan ini 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 lanjutan ini menunjukkan bahwa residu kombinasi AVM, PKS, dan TM memberikan pengaruh nyata terhadap C-organik, kapasitas pegang air, dan kadar air. Nilai kadar air (8,33%) dan kapasitas pegang air (86,93%) tertinggi diperoleh pada residu kombinasi perlakuan 0% AVM + 50% PKS + 50% TM, sedangkan kadar C-organik tertinggi (6,32%) diperoleh pada residu kombinasi perlakuan 10% AVM + 50% PKS + 40% TM. Seluruh perlakuan residu kombinasi media tanam tidak memberikan pengaruh nyata terhadap bobot kering pupus tanaman jagung. Korelasi dan regresi antara C-organik dengan nilai kadar air menunjukan bahwa 17% nilai kadar air dipengaruhi oleh C-organik dan memiliki hubungan sedang (r=0,4123), sedangkan korelasi dan regresi antara C-organik dengan kapasitas pegang air menunjukkan bahwa nilai kapasitas pegang air dipengaruhi C-organik sebesar 57,22% dan memiliki tingkat hubungan kuat (r=0,75).
ii ABSTRACT
Solid Edhar Kamil, 2012. Residue Effects of Merapi Volcanic Ash, Cow Manure and Mineral Soil Combination on Organic Carbon, Water Holding Capacity, Water Content and Dry Weight of Maize (Zea mays L.). Supervised by Nenny Nurlaeny and Emma Trinurani Sofyan.
This advanced research was conducted to find out the residue effects of Merapi volcanic ash (MVA), cow manure (CM) and Inceptisol mineral soil (MS) combination on organic carbon, water holding capacity, water content and dry weigth of maize (Zea mays L.). The polybag experiment in a screen house was carried out from February until May 2012, in the experiment field of Agriculture Faculty, University of Padjadjaran, Jatinangor at ± 740 m above sea level. The experiment used a Randomized Block Design which was 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 advanced research showed that there were significant effects of residue MVA, CM and MS combination on organic carbon, water holding capacity and water content. The highest water content (8.33%) and water holding capacity (86.93%) were found in residue combination of 0% MVA + 50% CM + 50% mineral soil, whereas the highest organic carbon (6.32%) was found in combination residue of 10% MVA + 50% CM + 40% mineral soil. All treatments had no significant effect on increasing of dry weight of Maize. Correlation and regression between organic carbon and water content showed that 17% water content was influenced by organic carbon and had a medium relationship (r=0.4123), whereas correlation and regression between organic carbon and water holding capacity showed that 57.22% of water holding capacity value was influenced by organic carbon and had a strong relationship (r=0.75).
