Abstract
The chemical properties of Podsolic Red-Yellow soil have pH is very acidic to slightly acidic, low to moderate percentage of C-organic, low to moderate P, and low status of K, Ca, Mg, Na, and other saturation of bases. Also, the physical characteristics of the Red-Yellow Podsolic soil show a distinctive characteristic, as bulk density soil index of 1.30 - 1.50 g.cm-3, with low water absorption. The chemical and physical properties are bad enough to make Red-Yellow Podsolic soil have a low ability to provide macronutrients needed by plants. Organic matter is proven to be able to control nutrient availability in mineral soils. The potentials for organic material that has been completely decomposed is crumb rubber solid waste. The use of crumb rubber solid waste material as organic material is expected to be able to influence the availability of macronutrients and improve the physical characteristics of the Podsolic Red-Yellow soil. This study aims to find differences in the availability of NH4+ NO3-, H2PO4-, K-exchangeable, C-organic and to compare the treatments that produce the best index of soil bulk density, increase the percentage of water content, and determine the soil temperature of Red-Yellow Podsolic with the application of crumb rubber solid waste with difference level, statistical test with through the index of mean difference Tukey’s test on level α 5%. In this research it was concluded that the application of crumb rubber solid waste could increase soil pH, provide levels of NH4+, NO3-, H2PO4, K-exchangeable, C-organic and reduce soil bulk density index, increase water content and soil temperature compared to not using crumb rubber solid waste. PCr3 treatment showed the highest yield at pH, NH4+, H2PO4, C-organic and increased water content, but it was not significantly different than PCr2 treatment, whereas PCr2 was significantly different from PCr3 in providing NO3-, K-exchangeable.
Highlights
Luas tanah mineral kering di Indonesia diperkirakan sekitar 148 juta hektar dengan penyebaran dominan tersebar dibeberapa kepulauan besar, diantaranya Sumatera, Kalimantan dan Papua
This study aims to find differences in the availability of NH4+ NO3, H2PO4, K-exchangeable, Corganic and to compare the treatments that produce the best index of soil bulk density, increase the percentage of water content, and determine the soil temperature of Red-Yellow Podsolic with the application of crumb rubber solid waste with difference level, statistical test with through the index of mean difference Tukey’s test on level α 5%
Ultisol untuk PengembanganD., Ritung, S., Anda, M., Sukarman., Suryani, E., Subandiono, R.E. 2016
Summary
Penelitian ini dilakukan pada Februari 2020 hingga Juni 2020. Penelitian bertempat di kebun percobaan Dinas Perkebunnan dan Peternakan Kalimantan Selatan UPT Balai Pengawasan dan Sertifikasi Benih Perkebunan (BPSBP), Jalan Ahmad Yani km. 82, Desa Sungkai Baru Kec. Adapun alat dan bahan yang digunakan dalam penelitian ini adalah polibag ukuran 30 cm x 40 cm sebanyak 20 lembar, bahan tanah Podsolik Merah Kuning diambil dari wilayah Kab. Banjar, pupuk majemuk NPK Calsium Amonium Nitrat Merk Cantik dengan spesifikasi 27% N dan 12% CaO, limbah padat karet remah dari PT. Pada penelitian ini juga dilakukan uji pendahuluan terhadap pH tanah, kandungan hara makro NH4+ NO3-, P-tersedia, Kdd dan C-organik dan karakter fisika tanah yakni berat isi volume, persentasi kadar air dan temperatur tanah Podsolik Merah Kuning tanpa perlakuan NPK majemuk dan limbah karet remah serta ditanamnnya tanaman Jagung sebagai indikator keberhasilan media ini sebagai media tanam. Dari hasil analisis uji BNJ pada taraf 5% menunjukkan bahwa terdapat perbedaan antara tanah yang diaplikasikan limbah padat, namun tidak berbeda nyata dari setiap perlakuan pengaplikasian limbah padat karet remah (Gambar 1), sedangkan perlakuan P cenderung menurunkan pH tanah, sebab terjadi perubahan bentuk pupuk majemuk yang menurunkan pH tanah. Proses oksidasi dan denitrifikasi dari pupuk majemuk menyebabkan terbentuknya H+ dan menurunkan pH tanah, sedangkan limbah padat karet remah memiliki pH 6,79 dan menghasilkan asam organik yang menekan pergerakan ion logam dan ikatan komplek kation
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