Penentuan Dosis Optimum Pemupukan N, P, dan K pada Tanaman Kacang Bogor [Vigna subterranea (L.) Verdcourt]

  • Sri Ayu Dwi Ayu Dwi Lestari Balai Penelitian Tanaman Aneka Kacang dan Umbi Jl. Raya Kendalpayak km. 8, PO Box 66, Malang 65101, Indonesia
  • Maya Melati Departemen Agronomi dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor (Bogor Agricultural University), Jl. Meranti, Kampus IPB Darmaga, Bogor 16680, Indonesia
  • Heni Purnamawati Departemen Agronomi dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor (Bogor Agricultural University), Jl. Meranti, Kampus IPB Darmaga, Bogor 16680, Indonesia

Abstract

ABSTRACT

Bambara groundnut is considered tolerant to drought and unfertile soil; therefore, has higher potential to be cultivated. The average yield of dry pod weight from agricultural fields in Indonesia is still low (< 4 ton ha-1); hence, the cultivation technique must be improved. Fertilizer is the main input to increase yield of Bambara groundnut, but the optimum rates of N, P, and K have not been determined. Therefore, the objectives of the research were to determine the optimum rate of N, P, and K fertilizer for Bambara groundnut production. Three parallel experiments were conducted at Cikarawang Experimental State, Dramaga, Bogor from March to July 2013. Each experiment tested different rates of N or P or K fertilizer with compeletely randomized block design and three replications. The fertilizer rates were 0, 50, 100, 150, and 200% of recommendation rate (100% N = 100 kg Urea ha-1, 100% P = 150 kg SP-36 ha-1, 100% K = 75 kg KCl ha-1). The results showed that leaf P content increased linearly with N fertilizer application. Leaf N content linearly decreased with P fertilizer application. Leaf P content and shoot dry weight quadratically increased with K fertilizer application. The optimum rates of N and P fertilizer was unable to be determined due to insignificant response of several variables. Optimum rate of K fertilizer ranged 86.4-118.95 kg KCl ha-1.

Keywords: leaf nutrients, multi nutrient response, recommendation rate

Published
2016-02-23
How to Cite
Lestari, S. A. D. A. D., Melati, M., & Purnamawati, H. (2016). Penentuan Dosis Optimum Pemupukan N, P, dan K pada Tanaman Kacang Bogor [Vigna subterranea (L.) Verdcourt]. Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy), 43(3), 193-200. https://doi.org/10.24831/jai.v43i3.11244