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Journal : Jurnal Ilmiah Universitas Batanghari Jambi

Efektivitas Beberapa Jenis Pupuk Nitrogen pada Pembibitan Tanaman Kakao (Theobroma cacao L.) Mutaqin, Zaenal; Pratiwi, Selvi; Yunita, Tika Rahma; Yama, Danie Indra; Solihin, Eso
Jurnal Ilmiah Universitas Batanghari Jambi Vol 25, No 2 (2025): Juli
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/jiubj.v25i2.6108

Abstract

This study aims to determine the most effective type and dosage of nitrogen fertilizer in cocoa nurseries and to evaluate the level of nitrogen absorption by cocoa seedlings with various types and dosages of nitrogen fertilizer. This study was conducted at the Experimental House of the Plantation Crop Cultivation Study Program, Pontianak State Polytechnic. The method used was a non-factorial Randomized Block Design (RAK). The experiment consisted of 10 treatments, each repeated 3 (three) times, resulting in a total of 30 experimental units. Each unit consisted of two plants, resulting in a total of 60 plants. The parameters observed in this study included plant height, number of leaves, leaf area, plant fresh weight, plant dry weight, and nitrogen absorption. The type and dosage of nitrogen fertilizer significantly affected plant height, leaf area, and nitrogen absorption. The highest nitrogen absorption rate in cocoa plants was obtained with nitrate fertilizer at a dose of 2.07 g N, resulting in an absorption value of 10.51%. Urea, ZA, and Calcium Nitrate fertilizers at a dose of 1.38 g N were found to be the most effective and recommended, as the use of smaller amounts of fertilizers produced results that were not significantly different compared to the use of Urea, ZA, and Calcium Nitrate at a dose of 2.07 g N.
Pengaruh Pembenah Tanah Cair dan Pupuk N, P, K terhadap Pertumbuhan Serta Hasil Tanaman Bawang Merah (Allium cepa, L.) Solihin, Eso; Sudirja, Rija; Yuniarti, Anni; Kamaluddin, Nadia Nuraniya
Jurnal Ilmiah Universitas Batanghari Jambi Vol 24, No 3 (2024): Oktober
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/jiubj.v24i3.5268

Abstract

This research aims to determine the effects of humic acid application on soil pH, organic carbon (C-Organic), cation exchange capacity (CEC), as well as the growth and yield of shallots. The study was conducted at the Ciparanje Experimental Garden, Faculty of Agriculture, Padjadjaran University, Jatinangor, Sumedang, from November 2023 to February 2024. The experimental method used was a Randomized Complete Block Design (RCBD) with six treatments and five replications. The treatments were: A; (0.5 Soil Amendment and 1 Standard N, P, K), B; (1 Soil Amendment and 1 Standard N, P, K), C; (1.5 Soil Amendment and 1 Standard N, P, K), E; Without Standard N, P, K and Soil Amendment (Control), and F; (Standard N, P, K). The results showed that the combination of soil amendments and N, P, and K fertilizers significantly affected the parameters of soil pH, C-Organic, CEC, and plant height at 14, 28, 42, and 56 days after planting (DAP); stem diameter at 14, 28, 42, and 56 DAP; number of tillers at 14, 28, 42, and 56 DAP; and shallot plant weight.