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All Journal Jurnal Aplikasi Bisnis dan Manajemen (JABM) E-Journal Jurnal Bioteknologi & Biosains Indonesia (JBBI) Jurnal Bioteknologi & Biosains Indonesia
Hanindipto, Fasa Aditya
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Environmental Science Health Professions

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THE EFFECT OF AMMONIUM-BASED NPK FERTILIZERS ON THE GROWTH OF MANGROVE SEEDLINGS Rhizopora mucronata AND Rhizopora stylosa Hanindipto, Fasa Aditya; Rasima Daulay, Fathin; Puji Rahayu, Sarwendah; Putri Irsani, Izma; Rizki Rachmani, Alfina; Evangelina, Helga
Jurnal Bioteknologi & Biosains Indonesia (JBBI) Vol. 12 No. 1 (2025)
Publisher : BRIN - Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jbbi.2025.8938

Abstract

Mangroves play an important role in coastal ecosystems, but their growth is often limited by nutrient availability, particularly nitrogen, phosphorus, and potassium (NPK) availability. The use of ammonium-based fertilizers can provide additional benefits by accelerating the growth of mangrove seedlings. This study examines the influence of various doses of ammonium-based NPK fertilizers on the growth of two mangrove species, Rhizophora mucronata and Rhizophora stylosa, The study was carried out in two different places with distinct environmental characteristics, Rhizophora mucronata was planted near land, whereas Rhizophora stylosa was planted in open areas near the sea. The seedlings received dosages of ammonium-based NPK fertilizer. Periodic measurements of growth characteristics, including leaf length, root length, plant height, and SPAD (Soil Plant Analysis Development) index, were conducted and tested statistically. Rhizophora mucronata responded effectively to ammonium-based fertilizer treatment, increasing plant height, root length, and chlorophyll content at an optimal dose of 0.9 grams per, although shoot growth decreased. These data show that Rhizophora mucronata is more responsive to ammonium- based fertilizer treatments than is Rhizophora stylosa under the evaluated environmental conditions, although the fertilizer dosage had no significant effect.
Respons Pasar Modal Indonesia Terhadap Pengumuman Insentif Fiskal Biaya R&D Korporat Hanindipto, Fasa Aditya; Suroso, Arif Imam; Andati, Trias
Jurnal Aplikasi Bisnis dan Manajemen Vol. 8 No. 1 (2022): JABM Vol. 8 No. 1, Januari 2022
Publisher : School of Business, Bogor Agricultural University (SB-IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17358/jabm.8.1.133

Abstract

This study examines the Indonesia stock market’s response to the announcement of tax deduction as an incentive for corporate R & D activity implementation. The study is performed using samples of 13 companies from Miscellaneous Industry and Consumer Goods Industry in Indonesia Stock Market June – July 2019 period. This study uses event study approach, by examining market reaction calculated by Cumulative Abnormal Return (CAR), Cumulative Abnormal Volume (CAV), and Cumulative Abnormal Frequency (CAF). To measure the significance of each variable, non-parametric statistic test Wilcoxon Signed Rank Test and Mann Whitney Test are performed. The Result shows that investors respond to the announcement of tax deduction as an incentive for Indonesia corporate R & D activity. Another result shows that there are different responses from Miscellaneous Industry and Consumer Goods Industry sectors in the Indonesia Stock Market. Keywords: Corporate R & D, event study, fiscal policy, tax deduction
THE EFFECT OF AMMONIUM-BASED NPK FERTILIZERS ON THE GROWTH OF MANGROVE SEEDLINGS Rhizopora mucronata AND Rhizopora stylosa Hanindipto, Fasa Aditya; Rasima Daulay, Fathin; Puji Rahayu, Sarwendah; Putri Irsani, Izma; Rizki Rachmani, Alfina; Evangelina, Helga
Jurnal Bioteknologi & Biosains Indonesia (JBBI) Vol. 12 No. 1 (2025)
Publisher : BRIN - Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jbbi.2025.8938

Abstract

Mangroves play an important role in coastal ecosystems, but their growth is often limited by nutrient availability, particularly nitrogen, phosphorus, and potassium (NPK) availability. The use of ammonium-based fertilizers can provide additional benefits by accelerating the growth of mangrove seedlings. This study examines the influence of various doses of ammonium-based NPK fertilizers on the growth of two mangrove species, Rhizophora mucronata and Rhizophora stylosa, The study was carried out in two different places with distinct environmental characteristics, Rhizophora mucronata was planted near land, whereas Rhizophora stylosa was planted in open areas near the sea. The seedlings received dosages of ammonium-based NPK fertilizer. Periodic measurements of growth characteristics, including leaf length, root length, plant height, and SPAD (Soil Plant Analysis Development) index, were conducted and tested statistically. Rhizophora mucronata responded effectively to ammonium-based fertilizer treatment, increasing plant height, root length, and chlorophyll content at an optimal dose of 0.9 grams per, although shoot growth decreased. These data show that Rhizophora mucronata is more responsive to ammonium- based fertilizer treatments than is Rhizophora stylosa under the evaluated environmental conditions, although the fertilizer dosage had no significant effect.
Co-Authors Arif Imam Suroso Evangelina, Helga Puji Rahayu, Sarwendah Putri Irsani, Izma Rasima Daulay, Fathin Rizki Rachmani, Alfina Trias Andati