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Nangoi, Ronny
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Agriculture, Biological Sciences & Forestry

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PENGARUH PUPUK ORGANIK KIRINYU UNTUK EFISIENSI PENGGUNAAN PUPUK UREA PADA PERTUMBUHAN TANAMAN PADI (Oryza sativa L.) Tumewu, P.; Nangoi, Ronny; Walingkas, Stanley A. F.; Porong, Vikson J.; Tulungen, A. G.; Sumayku, Bertje R. A.
EUGENIA Vol 25, No 3 (2019)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.25.3.2019.33863

Abstract

Conventional agriculture relies on the use of artificial chemical fertilizer, such as urea,during every planting season, causing a decrease in soil fertility. Unfertile land has a negative effect on rice production, putting strain on farmers.A replacement or complement for chemical fertilizers needs to be found; other than the negative long-term effects, increased demand for urea in the planting season can make it hard to find when farmers need it most. An organic alternative is kirinyu (Chromolaena odorata) which has high concentrations of nitrogen and also phosphorous, potassium, and other micronutrients. Kirinyu grows abundantly around rural farms and plantations and makes up a lot of local biomass. The aims of this research are to 1) Assess the interaction of kirinyu organic fertilizer dosage and urea dosage towards the growth of rice (Oryza sativa L.), and 2) determine the most efficient dosage of kirinyu and urea fertilizer for the best growth in rice. The research used a randomized block factorial design. The treatments were:Factor I (A) = Dosage of kirinyu organic fertilizer. A1 = 10 tons/ha, A2 = 20 tons/ha. Factor II (B) = Dosage of urea fertilizer. B1 = 50 kg/ha, B2 = 100 kg/ha, B3 = 100 kg/ha. Each treatment was replicated three times, resulting in 18 experiment plots. Variables observed were:height of plant and number of seedlings. Data was analyzed using analysis of variance and Least Significant Differences (LSD) at a test level of 5%. Results show that the combination of kirinyu organic fertilizer and urea fertilizer has a significant effect on plant height and number of rice seedlings.
KOMPONEN HASIL JAGUNG MANIS (Zea mays saccharata Sturt) PADA TAILING KECAMATAN TATELU YANG DIBERI PUPUK ORGANIK DAN PUPUK PHONSKA Sondakh, T. D.; Sumampow, D. M. F.; Polii, M. G. M.; Nangoi, Ronny; Mamarimbing, R.; Titah, Tilda
EUGENIA Vol 25, No 1 (2019)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.25.1.2019.31396

Abstract

Tailing is a type of waste produced by mining activities and is characterized by very low physical, chemical, and biological fertility, requiring efforts to amend its quality. The addition of organic materials as a soil ameliorant is one such effort of amendment to enhance success in rehabilitating these degraded areas. The aim of this study is to measure the effects of ameliorant on the growth and yield of sweet corn, determine dosage that will give the best growth and yield, and find out if residual mercury exists in the resultant sweet corn crop. This study used a randomized block design with 6 treatments: A= 40 tons/ha of organic fertilizer; B2= 50 tons/ha of organic fertilizer, C = 60 tons/ha of organic fertilizer, D = 40 tons/ha of organic+ fertilizer, E = 50 tons/ha of organic+ fertilizer, F = 60 ton/ha of organic+ fertilizer. The organic fertilizer used was a mix of 50% water hyacinth + 50% chicken manure, while organic+ fertilizer was a mix of 20% water hyacinth + 20% cow manure + 20% chicken manure + 20% traditional market waste + 20% rice straw. Every treatment was replicated four times, resulting in 24 experimental pots. Variables observed were: 1) cob length, 2) cob diameter, 3) cob weight. Data was analyzed using ANOVA and Tukey’s HSD at a test level of 5%. Results show that organic+ fertilizer increases the yield of sweet corn. A dosage of 60 tons/ha gave the best cobs with a weight of 199,89 grams per cob.
Co-Authors Polii, M. G. M. R. Mamarimbing, R. Sondakh, T. D. Sumampow, D. M. F. Sumayku, Bertje R. A. Tilda Titah Tulungen, Antje Grace Tumewu, P. Vikson J. Porong Walingkas, Stanley A. F.