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All Journal Vegetalika JURNAL AGROTEKNOLOGI Journal of Applied Agricultural Science and Technology Jurnal Penelitian Multidisiplin Bangsa
Laksamana, Hariy
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Agriculture, Biological Sciences & Forestry Computer Science & IT Economics, Econometrics & Finance Education Public Health Social Sciences

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EFFECTS OF SALINITY AND PYRITE ON THE GROWTH OF RICE SEEDLINGS (Oryza sativa) Laksamana, Hariy; Haviz, Alhaviz; Lestari, Sri Utami
Jurnal Agroteknologi Vol 16, No 1 (2025): Agustus 2025
Publisher : Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/ja.v16i1.36858

Abstract

Rice (Oryza sativa) is a major food commodity in Indonesia that is highly susceptible to environmental stressors, such as salinity and pyrite (FeS₂), which can inhibit its growth, particularly at the seedling stage. This study aimed to analyze the effects of salinity and pyrite on rice seedling growth, focusing on germination rate, root length, and fresh seedling weight. The research was conducted at the UPT Seed Certification and Plant Seed Certification of Food Crops and Horticulture in Pekanbaru for two months. The experimental design used was a Completely Randomized Design (CRD) consisting of two factors: salinity stress (3 levels: 0 mM, 50 mM, 100 mM) and pyrite stress (3 levels: 0 mg, 200 mg, 400 mg), with four replications for each treatment. The parameters observed included plant height, leaf number, root length, stomatal count, plant necrosis, and leaf area. The results indicated that salinity had a significant effect on plant height, with greater reduction observed at the 100 mM salinity concentration. Pyrite also affected leaf number and root length, although its impact was lower than that of salinity. The interaction between salinity and pyrite did not show synergistic effects, but both factors worsened the plant’s physiological condition. The combination of high salinity and high doses of pyrite caused increased leaf necrosis and a reduction in other growth parameters. In conclusion, both salinity and pyrite significantly affected rice seedling growth, and their interaction exacerbated the plant’s physiological condition. Environmental management and the selection of rice varieties tolerant to salinity and heavy metals are crucial to minimizing the negative impacts on rice growth.
Alelopati dan Masa Depan Bioherbisida Berbasis Tumbuhan: Pengaruh Genetik dan Lingkungan – Sebuah Tinjauan Laksamana, Hariy; Suri, Atika; Purnama, Indra
Vegetalika Vol 14, No 3 (2025): In Publish
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/veg.101403

Abstract

Weeds remain a persistent challenge in agriculture, significantly reducing crop productivity by competing for essential resources such as light, water, and nutrients. Although synthetic herbicides are widely used for weed control, their long-term application raises serious environmental and health concerns. As a sustainable alternative, plant-based bioherbicides that harness allelopathy—the natural chemical interactions among plants—are gaining attention. This review explores recent findings on the allelopathic potential of invasive and native plant species, focusing on key allelochemicals such as flavonoids, phenolics, and terpenoids that exhibit phytotoxic effects on weed species. Genetic factors, including specific quantitative trait loci (QTLs) and metabolic pathways involved in allelochemical production, are also discussed as critical determinants of allelopathic expression. Furthermore, environmental conditions such as temperature, soil composition, and light regimes can influence the efficacy and persistence of allelopathic compounds in the field. Understanding the synergistic interaction between genetics and environmental variables is essential for the development and optimization of effective, eco-friendly bioherbicides. This review highlights the current challenges and prospects in integrating allelopathy into weed management strategies for sustainable agriculture.
Diplomasi Perdagangan Riau di Malaysia (2020 -2024) : Upaya Peningkatan Perdagangan Ekspor di Pasar Malaysia Andriani, Roza; Hakim, Amri; Laksamana, Hariy
Jurnal Penelitian Multidisiplin Bangsa Vol. 2 No. 3 (2025): Agustus
Publisher : Amirul Bangun Bangsa Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/jpnmb.v2i3.581

Abstract

Penelitian ini bertujuan menjelaskan upaya diplomasi perdagangan Indonesia di Provinsi Riau untuk meningkatkan perdagangannya di Malaysia Tahun 2020 – 2024. Konsep yang digunakan Adalah konsep diplomasi perdagangan dari Okano Heijimans, Metode yang digunakan untuk riset ini Adalah metode kualitatif. Sumber data berasal dari studi Pustaka. Hasil riset menunjukan bahwa dalam periode 2020 -2024, Riau telah melakukan diplomasi perdagangan di Malaysia Upaya yang dilakukan melalui beberapa strategi utama, antara lain partisipasi aktif dalam misi dagang dan pameran internasional, penjajakan kerja sama dagang langsung dengan negara bagian Malaysia seperti Johor dan Selangor, serta pelibatan dinas perdagangan provinsi Riau dan perwakilan perdagangan Indonesia (Atdag dan ITPC) di Kuala Lumpur dan Penang. Pemerintah Riau juga aktif mendorong ekspor komoditas unggulan seperti kelapa, nanas, sagu, serta produk olahan UMKM berbasis kearifan lokal Melayu ke pasar Malaysia. Namun, sejumlah kendala masih menghambat peningkatan ekspor, seperti persyaratan sertifikasi halal dan standar mutu Malaysia yang ketat, keterbatasan logistik, serta rendahnya kesadaran branding produk lokal di pasar internasional. Meski demikian, Malaysia tetap menjadi pasar strategis dengan potensi besar bagi produk-produk Riau mengingat kedekatan geografis, kedekatan budaya Melayu, dan hubungan ekonomi bilateral yang telah terbina baik. Peluang kerja sama melalui joint venture, peningkatan promosi dagang, serta pendirian pusat distribusi produk Riau di wilayah perbatasan atau pelabuhan utama Malaysia menjadi opsi strategis yang dapat dimaksimalkan.  
Evaluation of the Physiological Quality of Rice Seeds (Oryza sativa) under Salinity and Pyrite Stress Conditions Laksamana, Hariy; Alhaviz, Alhaviz; Lestari, Sri Utami
Journal of Applied Agricultural Science and Technology Vol. 9 No. 4 (2025): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v9i4.429

Abstract

Salinity and pyrite are abiotic stress factors that can affect the physiological quality of rice seeds. This study aimed to evaluate the effects of salinity and pyrite stress on the viability and vigor of rice seeds. The research was conducted using a completely randomized design (CRD) with two factors: salinity levels (0 mM, 50 mM, and 100 mM NaCl) and pyrite dosages (0 mg, 200 mg, and 400 mg). The observed parameters included germination, maximum growth potential, vigor index, growth speed, simultaneous growth, and growth rate. The results showed that salinity stress significantly affected the vigor index and growth speed, while pyrite stress only influenced the growth speed. The interaction between the two factors did not show a significant effect on all physiological quality parameters of the seeds. However, there was a tendency for a decline in germination percentage, maximum growth potential, vigor index, growth speed, and simultaneous growth. The combination of high salinity stress (100 mM) and high pyrite dosage (400 mg) caused more pronounced growth retardation, particularly after day 10. Although rice seeds were able to maintain tolerance at low to moderate stress levels, an increase in the intensity of stress from both factors could hinder water and nutrient absorption, thereby reducing overall growth performance. The findings of this study provide insights into the tolerance limits of rice seeds to salinity and pyrite stress, which can serve as a basis for managing suboptimal lands for more sustainable rice production.
Co-Authors Alhaviz, Alhaviz Amri Hakim, Amri Andriani, Roza Haviz, Alhaviz Indra Purnama Sri Utami Lestari Suri, Atika