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All Journal BIOEDUSAINS: Jurnal Pendidikan Biologi dan Sains Research of Scientia Naturalis
Rahmawati Rahmawati
Universitas Puangrimaggalatung
Agriculture, Biological Sciences & Forestry Chemistry Education Physics

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Deteksi Awal Kandungan Logam Tembaga (Cu) pada Tanaman Kangkung Darat (Ipomoea reptans) Andi Badli Rompegading; Nur Fadhillah Muhlis; Rizky Arfadilla; Nur Indah Sari; Ayu Muliana; Rahmawati Rahmawati; Mutmainnah Gani; Ahmad Rinaldy; Muh. Faqhi S.; Mirjawanda Mirjawanda; Zakiah Tantu; Aisyah Gusfira; Uswah Trywulan Syah; Rizal Irfandi
BIOEDUSAINS: Jurnal Pendidikan Biologi dan Sains Vol 4 No 2 (2021): BIOEDUSAINS:Jurnal Pendidikan Biologi dan Sains
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (159.78 KB) | DOI: 10.31539/bioedusains.v4i2.2790

Abstract

This study aims to determine the initial content of copper metal found in land kangkung (Ipomoea reptans) plants. The method used is the descriptive quantitative analysis method. The results showed that samples 1, 2, 3, and 4 each had <0.50 mg/kg copper metal found in land kangkung. In conclusion, land kangkung has not been polluted, so it is safe for consumption and can also be used as phytoremediation in an environment contaminated by heavy metals. Keywords: Detection, Kangkung Land (Ipomoea reptans), Copper Metal (Cu)
ADVANCING SUSTAINABLE AGRICULTURE THROUGH NANO-FERTILIZERS ANALYZING SOIL HEALTH AND CROP PRODUCTIVITY IN TROPICAL ECOSYSTEMS Rahmawati Rahmawati; Siri Lek; Ton Kiat
Research of Scientia Naturalis Vol. 3 No. 3 (2026)
Publisher : Yayasan Adra Karima Hubbi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70177/scientia.v3i3.4248

Abstract

Sustainable rice production in tropical ecosystems is constrained by low nitrogen-use efficiency, nutrient losses, declining soil quality, and increasing dependence on conventional fertilizers. This study aimed to evaluate the effects of nano-nitrogen fertilizer on soil health, nitrogen efficiency, and rice productivity under tropical field conditions. A randomized complete block design was implemented with six treatments: no nitrogen, 100% conventional urea, and nano-nitrogen fertilizer applied at 25%, 50%, 75%, and 100% of the recommended nitrogen rate, each replicated four times. Crop growth, chlorophyll content, nitrogen uptake, yield components, grain yield, agronomic efficiency, and selected physical, chemical, and biological soil indicators were analyzed using analysis of variance, post hoc comparisons, correlation, and regression. Results showed that the 75% nano-nitrogen treatment produced the highest grain yield, reaching 7.24 t ha?1, and exceeded full-rate conventional urea while improving productive tillers, chlorophyll status, nitrogen uptake, microbial biomass, urease activity, organic carbon, and aggregate stability. The 100% nano-nitrogen rate increased nitrogen uptake but provided no additional yield advantage, indicating a nonlinear response. The study concludes that optimized nano-nitrogen application can reduce fertilizer demand while improving rice productivity and soil functioning, although multi-season environmental and safety assessments remain necessary before widespread adoption across diverse tropical production environments.
Co-Authors Ahmad Rinaldy Aisyah Gusfira Andi Badli Rompegading Ayu Muliana Irfandi, Rizal Mirjawanda Mirjawanda Muh. Faqhi S. Mutmainnah Gani Nur Fadhillah Muhlis Nur Indah Sari Rizky Arfadilla Siri Lek Syah, Uswah Trywulan Ton Kiat Zakiah Tantu