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AMAR ABDUL NAJIB

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Abstrak (Bhs. Indonesia)

Penelitian bertujuan mengetahui dosis pupuk urea yang efisien untuk pertumbuhan kale, mengetahui konsentrasi POC limbah tahu yang terbaik untuk pertumbuhan kale, mengetahui kombinasi pemupukan urea dan POC yang terbaik untuk pertumbuhan kale, serta mengetahui pengaruh pemupukan urea dan POC terhadap persentase efisiensi serapan N kale. Penelitian dilaksanakan di Desa Karangkemiri, Kecamatan Karanglewas, Kabupaten Banyumas, serta di Laboratorium Agronomi dan Hortikultura Fakultas Pertanian, Universitas Jenderal Soedirman dari bulan Agustus sampai Oktober 2019. Penelitian menggunakan Rancangan Acak Kelompok Lengkap (RAKL) 2 faktor, yaitu 4 dosis urea berupa U0 (0 g/tanaman), U1 (0,20 g/tanaman), U2 (0,41 g/tanaman), dan U3 (0,82 g/tanaman) serta 4 konsentrasi POC limbah tahu berupa T0 (0 ml/l), T1 (50 ml/l), T2 (100 ml/l), dan T3 (150 ml/l), sehingga diperoleh 16 kombinasi perlakuan dan diulang 3 kali dengan tiap unit terdapat 3 tanaman, sehingga keseluruhan terdapat 144 tanaman. Data dianalisis ragam pada taraf kesalahan 5% dan jika terdapat perbedaan signifikan, dilanjut uji Duncan’s Multiple Range Test 5%. Hasil penelitian menunjukkan pemupukan urea dosis 0,41 g/tanaman atau 50% dosis rekomendasi berpengaruh terhadap tinggi dan bobot tajuk segar kale, serta 0,82 g/tanaman berpengaruh terhadap luas daunnya. Pemupukan POC konsentrasi 150 ml/l berpengaruh terhadap tinggi kale dan 0 ml/l berpengaruh terhadap bobot akar keringnya. Pemupukan POC konsentrasi 150 ml/l tidak mampu memberikan efisiensi pemupukan urea sebesar 50% dosis rekomendasi, tapi konsentrasi 50 ml/l yang mampu dan berpengaruh terbaik hanya terhadap luas daun kale. Pemupukan urea dan POC tidak mampu meningkatkan persentase efisiensi serapan N kale secara optimal.

Abtrak (Bhs. Inggris)

The research aims to determine the most efficient dose of urea for kale’s growth, determine the best concentration of Liquid Organic Fertilizer (LOF) of tofu waste for kale’s growth, determine the best combination of urea and LOF of tofu waste for kale’s growth, and determine the effect of fertilization of urea and LOF of tofu waste to kale’s nitrogen absorption efficiency percentage. The research was conducted in the Karangkemiri village, Karanglewas district, Banyumas regency, and in the Laboratory of Agronomy and Horticulture, Faculty of Agriculture, General Soedirman University from August to October 2019. The research used Randomized Completely Block Design with 2 factors, that are 4 doses of urea fertilizer as follows U0 (0 g/plant), U1 (0,20 g/plant), U2 (0,41 g/plant), and U3 (0,82 g/plant) and 4 concentrations of LOF of tofu waste as follows T0 (0 ml/l), T1 (50 ml/l), T2 (100 ml/l), dan T3 (150 ml/l), so obtained 16 combinations of treatments and was repeated 3 times with each research unit consisting of 3 plants, so that overall 144 plants were obtained. Research data were analyzed using analysis of variance with an error rate of 5% and if it had a significant effect, so further testing was done with Duncan’s Multiple Range Test (DMRT) 5%. The results showed that the fertilization of urea dose 0,41 g/plant or 50% of recommendation dose has affected the kale’s height and shoot fresh weight, while 0,82 g/plant has affected the kale’s leaf width. The fertilization of concentration LOF of tofu waste 150 ml/l has affected the kale’s height and 0 ml/l has affected the kale’s dry root weight. The fertilization of concentration LOF of tofu waste 150 ml/l could not provide the efficiency of 50% of urea’s fertilization recommendation dose, but with concentration 50 ml/l was able to provide it and showed the best treatment for kale’s leaf width. The fertilization of urea and LOF of tofu waste were unable to increase optimal levels of kale nitrogen absorption efficiency percentage.

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