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      Optimasi pemupukan fosfor pada caisin (brassica rapa l. cv. Caisin) Di Tanah Andisol

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      Date
      2014
      Author
      Faranso, Donatila
      Susila, Anas Dinurrohman
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      Abstract
      Penelitian ini dilakukan untuk memperoleh dosis optimum pemupukan fosfor tanah Andisol. Penelitian dilakukan di Kebun Percobaan Pasir Sarongge Cianjur dari April hingga Mei 2014. Percobaan ini menggunakan rancangan Split Plot design.Bedeng utama (main plot) adalah pengkondisian hara P tanah yang terdiri atas lima taraf, yaitu X (1856.3 kg per ha P 2O5 ), 3/4 X (1392.225 kg per ha P 2O5 ), 1/2 X (928.15 kg per ha P 2O5 ), 1/4 X (464.076 kg per ha P 2O5 ) dan 0 X (0 kg per ha P 2O5). Anak Bedeng (sub plot) adalah dosis pemupukan P yang terdiri atas lima taraf, yaitu X (1856.3 kg per ha P 2O5 ), 3/4 X (1392.225 kg per ha P 2O5 ), 1/2 X (928.15 kg per ha P 2O5), 1/4 X (464.076 kg per ha P 2O5 ) dan 0 X (0 kg per ha P 2O5). Dimana X = 1856.346 kg P2O5 per ha atau 5156 kg SP-36 per ha, yaitu P yang dibutuhkan untuk mencapai kadar P sangat tinggi pada tanah Andisol Pasir Sarongge. Dosis N dan K yang digunakan adalah 200 kg per ha Urea (45% N) dan 100 kg per ha KCL (60% K 2 O). Pengkondisian hara P tanah berpengaruh sangat nyata terhadap pertumbuhan dan hasil tanaman caisin. Perlakuan pemupukan P tidak memberikan pengaruh yang nyata terhadap pertumbuhan dan hasil tanaman caisin pada tingkat kesuburan tanah sedang pengekstrak Bray. Serangan penyakit akar gada dapat menjadi penyebab pemupukan tidak berpengaruh pada tanaman. Persentase jumlah tanaman yang terserang penyakit akar gada adalah 11.90%. Dosis rekomendasi pemupukan P di Kebun Percobaan Pasir Sarongge belum dapat ditentukan
       
      This study was conducted to find out the optimum of phosphorus fertilization on andisol. The study was conducted at the Experimental Farm Pasir Sarongge Cianjur from April to May 2014. This study arranged in split plot design. The main plot is conditioning the soil of P consisting of five rates, namely X (1856.3 kg/ha P2O5), 3/4 X (1392.225 kg/ha P2O5), 1/2 X (928.15 kg/ha P2O5), 1/4 X (464.076 kg/ha P2O5) and 0 X (0 kg/ha P2O5). Subplot is a rate of fertilizer P which consists of five levels, namely X (1856.3 kg/ha P2O5), 3/4 X (1392.225 kg/ha P2O5), 1/2 X (928.15 kg/ha P2O5), 1/4 X (464.076 kg/ha P2O5) and 0 X (0 kg/ha P2O5). Where X = 1856.346 P2O5 kg/ha or SP-36 5156 kg/ha, ie P is needed to achieve very high levels of P in the soil Andisol Pasir Sarongge. Dose of N and K were used was 200 kg ha upper of urea (45% N) and 100 kg ha upper KCl (60% K2O). The results showed that the conditioning of the soil nutrient P is able to enhance the growth and yield of caisin, whereas P fertilization treatment did not give significant effect on the growth and yield of caisin. P fertilization treatment did not give a significant effect on the growth and yield of crops on soil fertility extracting Bray. Mace root disease may be the cause of fertilization had no effect on the plant. The percentage of plants affected mace root disease was 11.90%. The dose of P fertilizer recommendations at the experimental Pasir Sarongge could not be determined
       
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      http://repository.ipb.ac.id/handle/123456789/71521
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