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Journal : Journal of Tropical Crop Science

Determination of Fertilizer Doses of Sweet potato (Ipomoea batatas L.) “Rancing” Ayu Puspita Ningrum; Suwarto Suwarto; Asep Setiawan
Journal of Tropical Crop Science Vol. 5 No. 2 (2018): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (344.424 KB) | DOI: 10.29244/jtcs.5.2.55-63

Abstract

Nitrogen, phosphorus, and potasium availability are the most thresholding factors for maximum growth and yield. The tuber yield of sweet potato varies depending on growing area therefore a fertilization program, especially in the type and the dose of the fertilizers, is required. This research was conducted in the Pasir Muncang experimental farm at Gadog, Bogor, West Java, Indonesia. The study site is located ±500 meters above sea levels, 6°39’31.90” south latitude and 106°52’7.77” east longitude. The experiment was started in May to September 2017. Multi nutrient response method was used for this study, and the interpretation of the results was used to develop fertilizer recommendations using single-nutrient quadratic model. The recommendation was determined using N, P2O5, K2O fertilizer response curve, where the first recommendation was calculated from the maximum relative yield,and the second, third, and fourth recommendation were determined from N, P2O5, K2O threshold. Each treatment for N, P and K was evaluated with different level of fertilizer dose using a randomized complete block design with three replications. The fertilizer doses were 50, 100, 150 and 200% from reference (100% N = 100 kg N ha-1, 100% P = 75 kg P2O5 ha-1, dan 100% K = 100 kg K2O ha-1). Relative yield of sweet potato (y), response to fertilizer (x) had improvement quadratically with equation y = -0.0017x2 + 0.538x + 40.035 for N, y = -0.0041x2 + 0.8595x + 38.211 for P2O5, and y = -0.0025x2 + 0.4318x + 73.377 for K2O. The optimized dose of fertilizer to get maximum yield of sweet potato tuber is 158.23 kg ha-1 of N, 78.60 kg ha-1 of P2O5, and 83.60 kg ha-1 K2O, or 343.97 kg ha-1 of Urea,  218.53 kg ha-1 of SP36 139.33 kg ha-1 of KCl.Keywords: multi nutrient response, nitrogen, relative yield, phosphorus, potassium
Co-Authors . Giyanto Adi Tia Setiawan Ady Kusuma Nurcholis Afifah Farida Jufri Aghus Jamaludin Kharis Agus Purwantara Agustian, Yanyan AJAR DIRGANTORO Ajeng Amanda Thayeb AK Sembiring, Desy Aldebaran Raihan Revidy ALEX HARTANA Alfianta Cesario Rizky Maulana Alma Ghina Halimah Anah Sasmita Andi Ismira Andreas Tan Aris Purwanto Arya Panca Asroni Asroni Ayu Puspita Ningrum Azrai, Muhammad S Bambang Eko Widyanto Bambang Heliyanto Bambang Heliyanto BAMBANG HELIYANTO BAMBANG HELIYANTO Bani Sakti Bayu Brahmantia Betty Mauli Rosa Bustam Cecep Effendi Darmawan Saptadi Darmawan Saptadi Darmawan Saptadi Devi Novianti Dhanang Ajie Dinar Meidiana Dindin Abidin DONATA S PANDIN Dwi Putri Maulida Dwinita W. Utami Dwinita Wikan Utami Edi Guhardja Elfan Fanhas Fatwa Khomaeny Endang Sulastri Erwin Yuniar Rahadian Fadli Wahab Frederico Tunggal Gina Rahma Utami Gunanto , Djoni Gunarto Gun H. Hardhienata HAJRIAL ASWIDINNOOR Hamka Hamka Hanan Dwiky Masshafy Hani Handayani Haris Aprianto Setiawan Harmonis Hendrik Syaputra Heri Budiawan Ida Hanarida Indarini Dwi Pursitasari Iriana Bakti Iswara, Vidya Itkonul Akbar Kadeni Kadeni, Kadeni Kamajaya, Ryan Muhammad Azizulfiqar Laode Muhamad Fathun Lilis Lismayanti Maesaroh Lubis Megayani Sri Rahayu Memen Surahman Memen Surahman Miftahul Falah Miftahul Ulum Muhamad Agung Dharmajaya Muhamad Asykal Rizki Muhamad Fikri Dzam-Dzam Muhammad Isa Asyrofuddin Mujiarto Mujiarto Nadya Paramitha Nandang Ahmad W Nandang Ahmad Waluya Naufal Fauzi Akbar Neni Nuraeni Neni Sholihat Nofirman Nurhajati A. Mattjik Nurhajati A. Mattjik Nurhalim Nuri Aslami Pabendon, Marcia B Palupi, Endah R. Pito Fernando Puspa Khoerun Nisa R r. SRI HARTATI R.R. SRI HARTATI Reni Indrayanti Rino Vanchapo , Antonius Risma Rahmawati Rizka Putra Roberdi, Roberdi S Rr Sri Hartati Rr. Sri Hartati Rubiyo Rubiyo Saepudin Sarijan, Abdullah - Septina Putri Laia Setiani, Revina Putri Slamet Riyadi Sony Sumaryo Sri Mulyanti Sri Yunanto Sudarsono Sudarsono Sudarsono Sudarsono Sudarsono Sudarsono SUDARSONO SUDARSONO SUDARSONO SUDARSONO SUGIONO MOELJOPAWIRO Sugiono Moeljopawiro Suhartanto, Muhammad Rahmad Sulastri Rini Rindrayani Surti Kurniasih Surtikanti Sutrisno, Sutrisno S Suwarto Suwarto Syahnanto Noerdin Tisngatul Aliyah UBHI, Trias Inang Novanti Usni Wahyu Hidayat Waluya, Nandang Ahmad Yanyan Mochamad Yani Yudha Purwanto