Abstract
Suminarti et al, 2018. Effect of Source and Dosage of Organic Materials on Changes in Soil Chemical Properties, Growth and Yield of Sorghum Plants (Sorghum bicolor L.Moench) var. KD4 in Dry Land Jatikerto, Malang. JLSO 7(2): Agricultural extensification is the right step to anticipate conditions of food insecurity. This refers to two reasons, namely (1) proliferation of land conversion activities, and (2) sorghum is a carbohydrate-producing plant that is quite tolerant when planted on dry land. The objective of this study was to obtain information about the sources and doses of organic matter that are appropriate to changes in soil chemical properties, growth and yield of sorghum plants, and has been carried out in the dry land of Jatikerto, Malang. A split plot designs with three replications were used in this study, sources of organic material (blothong, UB compost and cow dung) as the main plot, and doses of organic matter (125%, 100% and 75%) as a subplot. Soil analysis was carried out 3 times, i.e. before planting, after application of organic matter and at harvest. The agronomic observations were carried out destructively at 80 days after planting (DAP) including the components of growth (root dry weight, leaf area, and total dry weight of the plant) and harvest at the age of 90 DAP.F test at 5% level was used to test the effect of treatment, while the difference between treatments was based on LSD level of 5%.The results showed that there was a significant interaction between the source and dosage of organic matter on the leaf area and total dry weight, the highest yield was obtained in blothong at various doses. Higher yields of seeds per hectare were also found in blotong: 1.76 tons ha-1, and 1.73 tons ha-1 on 125% doses of organic matter. Blotong application is able to provide elements of N, P and K soil respectively 18.3%, 85.68% and 8.42% for plant.
Highlights
Spesifikasi Area Percobaan Penelitian dilakukan di lahan keringBerjarak kurang lebih 30 km arah selatan kota Malang, dan terletak pada ketinggian ± 330 mdpl
The low content of soil organic matter and soil fertility are characteristics of dry land
The land can be utilized for agricultural farming, a material that is capable of acting as a soil improvement is needed, namely organic matter
Summary
Berjarak kurang lebih 30 km arah selatan kota Malang, dan terletak pada ketinggian ± 330 mdpl. Kotoran sapi (S3) Dosis bahan organik ditempatkan pada anak petak yang didasarkan pada dosis rekomendasi dari hasil perhitungan kebutuhan bahan organik, dan terdiri dari 3 taraf: 1.125% (23,39 ton ha-1) (D1) 2.100% (18,70 ton ha-1) (D2) 3.75% (14,04 ton ha-1) (D3). Total luas lahan yang digunakan sekitar 348 m2, sedangkan luas petak perlakuan adalah 8,82 m2 yang terdiri dari 63 tanaman. Perhitungan Dosis bahan organik didasarkan pada: (1) kandungan N dari hasil analisis tanah awal, (2) hasil analisis bahan organik (Tabel 1) dan (3) kebutuhan N pada tanaman sorgum. A1 : Kadar teratas kisaran N total tanah (%) yang didasarkan pada pedoman penentuan kriteria status unsur. A2 : Kadar terbawah kisaran N total tanah (%) yang didasarkan pada pedoman penentuan kriteria status unsur. XB : Nilai terbawah dosis kebutuhan N tanaman sorgum ha-1: 20 kg N ha-1 (Pradana et al, 2014)
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