Abstract
The research was conducted from August 2014 to Januari 2015 in the Ultisol Land, Pematang Berangan Village, Rokan Hulu Regency, Riau Province. The study aims to determine the availability of P, P and Si uptake by upland rice plants granting silicate and phosphate fertilizer on Ultisol land. The form of this research is experimental factorial completely randomized design consist of two factors. The first factor is silicate consists of four levels (0, 50, 75, and 100 kg SiO2/ha), while the second factor is phosphate fertilizer consists of four levels (0, 36, 54, and 72 kg P2O5/ha), each combination was repeated three times. The results showed that administration of silicates and phosphates increase the availability of P, P and Si uptake of upland rice crop. Giving of 100 kg SiO2 and 36 kg P2O5 per hectare increase uptake of P and Si, each respectively increased by 208 % and 218 % compared without silicates and phosphates fertilizer.
Highlights
The research was conducted from August 2014 to January 2015 in the Ultisol land, Pematang Berangan Village, Rokan Hulu Regency, Riau Province
The results showed that addition of silicates and phosphates increase the availability of P, P and Si uptake of upland rice crop
Teknologi Produksi dan Strategi Pengembangan Kedelai pada Lahan Kering Masam
Summary
Penelitian dilaksanakan di laboratorium dan di lapangan dari bulan Agustus 2014 sampai Januari 2015 Percobaan lapangan dilakukan di Lahan Ultisol di Desa Pematang Berangan, Kecamatan Rambah, Kabupaten Rokan Hulu, Riau. Analisis sifat kimia tanah sebelum dan setelah penelitian dilakukan di laboratorium Balai Penelitian Tanah Bogor. Sifat kimia tanah awal yang dianalisis meliputi pH H2O (pH meter), C-organik (Walkley dan Black), N-total (Kjeldahl), nisbah C/N, Ptersedia (Bray I), Kation Basa dapat dipertukarkan (K-dd, Na-dd, Ca-dd, Mg-dd) dan KTK (NH4OAc pH 7), KB dan kejenuhan Al (KCl 1 N). Sifat kimia tanah setelah penelitian meliputi pH (pH meter), P-tersedia (Bray I) dan Al-dd (KCl 1 N). Hasil pengamatan setiap parameter dianalisis secara statistik menggunakan analisis ragam dan perbedaan setiap kombinasi perlakuan diketahui dengan uji lanjut Duncan pada taraf 5%. Padi gogo varietas Situbagendit sebagai tanaman indikator, Na2SiO3 dan SP36 masing-masing mengandung 29% SiO2 dan 36% P2O5 sebagai sumber silikat dan pupuk Fosfat, Urea dan KCl sebagai pupuk dasar masing-masing 200 kg/ha dan 150 kg/ha. Data hasil penelitian dianalisis dengan menggunakan program SAS portable 9.1.3 dengan uji lanjut Duncan (DMRT)
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