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RIZKY KURNIAWAN

NIM

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Abstrak (Bhs. Indonesia)

Tujuan penelitian ini adalah untuk mengetahui : 1) sifat peluruhan pupuk N-urea yang dikelat yang ditangaskan ( steam-waterbath) pada penangas air temperatur 50 oC dan 70 oC. 2) formula pupuk terbaik setelah dilakukan pengujian dengan metode peluruhan penangas air. 3 ) pengaruh pemberian lima formula pupuk nitrogen yang telah dikelat bahan lokal terhadap pertumbuhan tanaman bayam.. Pengujian peluruhan menggunakan lima formula pupuk  nitrogen yang dikelat bahan lokal : F1 (60% Urea, 10% Azolla microphylla, 10% Montmorillonite, 10% Gondorukem, 10% Asam humat), F2 (70% Urea, 10% Azolla micophylla, 10% Montmorillonite, 10% Gondorukem) , F3 (70% Urea, 10% Azolla microphylla, 10% Montmorillonite, 10% Asam humat), F4 (70% Urea, 10% Azolla microphylla, 10% Gondorukem, 10% Asam humat), F5 (70% Urea, 20% Azolla microphylla, 10% Montmorillonite). Uji agronomis tanaman bayam menggunakan tanah inceptisol. Faktor uji agronomis yaitu lima formula pupuk ditambah perlakuan formula 0 sebagai kontrol dengan komposisi pupuk urea, SP-36 dan KCL. Penelitian uji agronomis tanaman bayam menggunakan Rancangan Acak Lengkap (RAL), dengan satu faktor berupa formula pupuk dan empat kali ulangan. Variabel yang diamati adalah pertumbuhan dan hasil tanaman bayam. Hasil penelitian menunjukkan bahwa formula pupuk nitrogen Formula 4 yang lepas-lambatnya paling stabil dan paling baik setelah dilakukan uji agonomis. Formula pupuk nitrogen  berpengaruh terhadap tinggi tanaman, bobot segar tanaman, bobot segar akar, bobot kering tanaman, jumlah daun, dan luas daun.

Abtrak (Bhs. Inggris)

This research was aimed to: 1) dissolution properties of fertilizers in water chilled at temperatures of 50o C and 70 oC, 2) the effect of giving five nitrogen fertilizer formulas which had local ingredients mixed to the growth of Spinach plants, and 3) the best fertilizer formula after it was done testing with the method of water bath decay. The decay test uses five nitrogen fertilizer formulas which are chelated with local ingredients: F1 (60% Urea, 10% Azolla microphylla, 10% Montmorillonite, 10% Gondorukem, 10% humic acid), F2 (70% Urea, 10% Azolla micophylla, 10% Montmorillonite, 10% Gondorukem), F3 (70% Urea, 10% Azolla microphylla, 10% Montmorillonite, 10% humic acid), F4 (70% Urea, 10% Azolla microphylla, 10% Gondorukem, 10% humic acid), F5 (70% Urea, 20% Azolla microphylla, 10% Montmorillonite). The agronomic test of the spinach plant uses inceptisol soil. The agronomic test factor is five fertilizer formulas plus F0 treatment (fertilizer N, P, K) as a control. The agronomic analysis of the spinach plant used a completely randomized design (CRD), with one factor in the form of a fertilizer formula and four replications. The variables observed were the growth and yield of spinach plants. The results showed that the Formula 4 nitrogen fertilizer formula was the most stable. Nitrogen fertilizer formula affects plant height, plant fresh weight, root fresh weight, plant dry weight, leaf number, and leaf area.

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