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All Journal AGROEKOTEKNOLOGI Jurnal Biologi Tropis jurnal Ilmu Pertanian (Agricultural Science)
Sutan Tarmizi Lubis
Politeknik LPP Yogyakarta
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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Effect of Plant Growth Regulator and Media Composition on Growth Budding Planting mukibat Cassava sutan tarmizi lubis; nini - rahmawati; T - Irmansyah
Jurnal Agroekoteknologi Vol 5, No 1 (2017)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (277.759 KB) | DOI: 10.32734/jaet.v5i1.14593

Abstract

The purpose of research was effect of plant growth regulator and media composition on growth  budding  planting cassava.This research was conducted in the  screen house of  Agriculture Faculty USU (± 25 m asl) from February-April 2016 using factorial group randomized  design  (RAK) with 3 times repitition. The first factor was source of growth  regulators with  four  levels  ie: without  not  giving  the   source  of  ZPT  (P0), coconut  water  50%  (P1),shallot  extract  100%  (P2) and IAA 0.05% (P3) and the second factor was medium on the growth composition goat   manure: top soil: rice husk with three  levels of  treatment  are:  3: 1: 1  (M1),2: 1: 2 (M2) and 1: 1: 1 (M3).The observed parameters was the percentage of success, speed of bud, the bud length, and roots volume. The results of this research showed that the sources of growth regulators affected the speed of germination significantly. The best source of growth regulator treatment was in the level of 50% coconut water. Giving medium on the growth composition significantly affected to the speed germinate and the bud length. The best level of growing media composition is best to goat manuare: top soil: rice husk 3: 1: 1 (M1).  Interactions between source of growth regulators and medium on the growth composition significantly affect the success of percentage parameter, the diameter of bud and amount leaves. Thd best level of combination treatment contained in the shallot extract 100%,  coconut water 50% and growing media composition 3: 1: 1.   Key words : budding, plant growth regulator, the growth composition
Anatomical characteristics of cocoa plant roots as affected by the levels of calcium fertilization Sutan Tarmizi Lubis; Eka Tarwaca Susila Putra; Budiastuti Kurniasih
Jurnal Ilmu Pertanian Vol 7, No 2 (2022): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.69842

Abstract

Cocoa plant (Theobroma cacao L.) is one of good annual crops grown in Indonesia. The disadvantages and advantages of Ca in plants can affect morphology and anatomy in plants. This research aimed to identify the effect of Ca on the anatomical performance of the roots of cocoa plants and determine the optimal dose of Ca for the anatomical characteristics of the roots of cocoa plant. The research was conducted at the cocoa plantation owned by PT. Pagilaran at North Segayung Production Unit, Tulis Subdistrict, Batang Regency, Central Java, in October 2019 – February 2021. The observation of root anatomy was carried out by making preparations, and the plant roots were taken destructively and sliced transversely. The field experiment was arranged using a single factor randomized complete block design. The treatments consisted of without fertilizer application and calcium fertilization at a dose of 100 g/tree/year, 200 g/tree/year, 300 g/tree/year, and 400 g/tree/year. The cocoa clone used was clone RCC 71. The results showed that an increase in the dose of CaCl2 fertilizer up to 400 g/tree/year was generally followed by an increase in the size of the xylem and phloem diameters, the thickness of the cork layer, the thickness of secondary cortex, and the diameter of the stele. The quadratic effect of the dose of CaCl2 fertilizer was observed only on the thickness of the root cambium tissues. Thus, it is necessary to conduct further research to determine the optimal dose of Ca fertilizer for the anatomical characteristics of cocoa roots.
Growth and Yield Response of Rice (Oryza sativa L.) to Compound Copper and Zinc Micronutrient Fertilization Lubis, Sutan Tarmizi; Putra, Eka Tarwaca Susila; Silmia, Betha
Jurnal Biologi Tropis Vol. 26 No. 1 (2026): Januari-Maret
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i1.11147

Abstract

This study evaluated a Zn–Cu compound micronutrient fertilizer on plant growth, yield components, grain yield, and fertilizer-use efficiency of Inpari 32 rice. A field experiment was conducted in an Inceptisol paddy field (1,100 m²) in Margokaton, Seyegan, Sleman, Yogyakarta, Indonesia (January–April 2025). Treatments were arranged in a non-factorial completely randomized design with eight fertilizer regimes and four replications, combining NPK with graded rates of Zn+Cu fertilizer. Pre- and post-planting soil nutrient analyses and post-harvest leaf tissue nutrient analyses were conducted, and vegetative traits, yield, Relative Agronomic Effectiveness (RAE), and fertilizer-use efficiency were evaluated. Soil Zn and Cu were initially very high and high, respectively, but remained below toxicity thresholds. Compared with regimes without Zn+Cu, Zn+Cu additions significantly increased plant height, tiller number, and milled dry grain yield. Treatments P2–P7 achieved RAE >100%, indicating greater agronomic effectiveness than the non-Zn+Cu regimes. The most effective dosage was P6 (1 dosage NPK + 1.5 dosage Zn+Cu).
Co-Authors Budiastuti Kurniasih Eka Tarwaca Susila Putra Eka Tarwaca Susila Putra nini - rahmawati Silmia, Betha T - Irmansyah