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Abstrak (Bhs. Indonesia)

Penelitian ini bertujuan untuk mengetahui: 1) pengaruh pemberian pupuk NZEO-SR terhadap sifat kimia tanah dan serapan N oleh tanaman padi gogo aromatik pada Ultisol dan 2) tingkat efisiensi penggunaan pupuk NZEO-SR oleh tanaman padi gogo aromatik pada Ultisol. Penelitian dilaksanakan di lahan kering jenis Ultisol yang berlokasi di Desa Karangrau, Kecamatan Banyumas, Kabupaten Banyumas dan di Laboratorium Ilmu Tanah, Fakultas Pertanian, Universitas Jenderal Soedirman, Purwokerto pada Januari sampai Mei 2016. Penelitian dilakukan dengan Rancangan Petak Terbagi dengan 3 ulangan. Petak utama berupa varietas padi gogo aromatik terdiri atas 2 jenis, yaitu varietas Inpago Unsoed I (V1) dan G9 (V2). Anak petak berupa takaran pupuk NZEO-SR terdiri dari 6 aras, yaitu 0 kg N/ha (N0), 35 kg N/ha (N1), 70 kg N/ha (N2), 105 kg N/ha (N3), 140 kg N/ha (N4) dan 175 kg N/ha (N5). Hasil penelitian menunjukkan bahwa pemberian berbagai takaran pupuk NZEO-SR berpengaruh nyata menurunkan DHL tanah, menurunkan Al-dd tanah, meningkatkan bobot basah daun, bobot basah malai dan serapan N gabah (mg N/tanaman), namun tidak berpengaruh nyata terhadap pH H2O, pH KCl, N total, H-dd tanah, bobot basah akar, bobot basah batang, bobot basah gabah, bobot kering akar, bobot kering batang, bobot kering daun, bobot kering gabah, bobot kering malai, dan serapan N daun. Pupuk NZEO-SR pada takaran 35 kg N/ha mempunyai efisiensi penggunaan unsur hara N oleh tanaman tertinggi yaitu sebesar 63%.

Abtrak (Bhs. Inggris)

This research aims to know : 1) the effect of fertilizer  NZEO-SR to the chemical characteristics of soil and N uptake by aromatic upland rice plants on Ultisol and 2) determine the level of fertilizer use efficiency NZEO-SR by aromatic upland rice plants on Ultisol. The research had been conducted on dry land types Ultisol located at the Karangrau village, Banyumas district, Banyumas regency and in the Laboratory of Soil Science, Faculty of Agriculture, University of Jenderal Soedirman, Purwokerto from January to May 2016. The research had been conducted with a split plot design with three replications. The main plot was aromatic upland rice plant varieties with two kinds, namely Inpago Unsoed I varieties (V1) and G9 (V2). The subplots were doses of NZEO-SR consists of six levels, i.e. 0 kg N/ha (N0), 35 kg N/ha (N1), 70 kg N/ha (N2), 105 kg N/ha (N3), 140 kg N/ha (N4) and 175 kg N/ha (N5). The results showed that the NZEO-SR would decrease of soil-EC, exchangeable Allumunium, increase of fresh root weight, fresh leaves weight and uptake N of grain (mg N/plant), did not significantly affect on pH H2O, pH KCl, total-N, exchangeable Hidrogen of soil, fresh root weight, fresh stem weight, fresh grain weight, fresh panicle rice weight, dry root weight, dry stem weight, dry leaves weight, dry grain weight, dry panicle rice weight and N uptake of leaves. NZEO-SR fertilizers at the dose of 35 kg N/ha was the highest of N use efficiency by plant, i.e. 63%.

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