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All Journal BIOEDUSCIENCE Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)
Soedjarwo, Djarwatiningsih Poengky
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Engineering

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Similarity Among 10 Cayenne Pepper (Capsicum frutescens L.) Mutant Accessions Resulted from Gamma-Ray Irradiation Khairunissa, Asya Zhafira; Makhziah, Makhziah; Soedjarwo, Djarwatiningsih Poengky
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 4 (2025): August 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i4.1434-1440

Abstract

Cayenne pepper (Capsicum frutescens L.) is a horticultural crop which production is not comparable to the level of public consumption. Chili plants induced by gamma irradiation experienced character changes, which caused the population of mutant accessions to have a diversity of characters. The similarity test of mutant accessions was carried out to determine the relationship distance between accessions. The research was carried out at the Faculty of Agriculture, UPN "Veteran" East Java, Surabaya City, with a geographical location at 7⁰ 9' - 7⁰ 21' South Latitude and at 112⁰ 36' - 112⁰ 54' East Longitude. The experimental design used was a Completely Randomized Design, with 3 replications of each, also using one factor, namely mutant ( ) or genotype resulting from gamma ray irradiation mutations of cayenne pepper. Heritability tests were also carried out in this study. The results of the heritability test showed that the characteristics of plant height, fruit length, fruit diameter, fruit weight per plant, and number of fruit per plant had high heritability values, namely above 30%. The result of similarity test visualized by the dendogram shows that 10 mutant accessions and the parental have a similarity coefficient ranging at 21% to 78%. The lowest similarity coefficient is owned by M2 accession, specifically at 21%.
Pengaruh Defoliasi Daun dan Subtitusi Pupuk NPK Phonska dengan Guano terhadap Produksi Jagung (Zea mays L.) Novitasari, Vrida; Soedjarwo, Djarwatiningsih Poengky; Suhardjono, Hadi
BIOEDUSCIENCE Vol 9 No 2 (2025): BIOEDUSCIENCE
Publisher : Universitas Muhammadiyah Prof. Dr. Hamka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/jbes/16135

Abstract

Background: Corn (Zea mays L.) is the most essential food commodity after rice and a secondary crop. The demand for Corn in Indonesia is currently relatively high, yet its production has been declining. To increase Corn production, improvements in cultivation techniques are necessary. One such method is optimizing assimilate distribution through leaf defoliation, as well as creating optimal growing conditions through fertilization. Fertilization should be balanced by using both inorganic and organic fertilizers. In this study, NPK Phonska and Guano fertilizers were used. Methods: This study employed a factorial randomized complete block design (RCBD) with two factors. The first factor was the level of leaf defoliation below the cob, consisting of three levels: no defoliation (D1), defoliation leaving three leaves (D2), and defoliation leaving two leaves (D3). The second factor was the substitution of NPK Phonska and guano fertilizers with five levels: 100% NPK Phonska (P1), 75% NPK Phonska + 25% Guano (P2), 50% NPK Phonska + 50% Guano (P3), 25% NPK Phonska + 75% Guano (P4), and 100% Guano (P5). Results: The study's results showed that defoliation, leaving two leaves below the cob, combined with the application of 7 tons/ha of guano fertilizer without the addition of NPK, increased cob weight, cob length, and dry kernel weight per plant. Additionally, the independent application of 7 tons/ha of guano fertilizer without NPK Phonska significantly increased cob diameter. Conclusions: The combination treatment of defoliation, leaving two leaves below the cob, and the application of 7 tons/ha of guano fertilizer without the addition of NPK had the most favorable effect on Corn production.
Co-Authors Hadi Suhardjono Khairunissa, Asya Zhafira Novitasari, Vrida