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The Effect of Coral Reef Ecological Changes on the Socio-Economic Community in Mapur Village Adrinal, Adrinal; Wahyudin, Wahyudin; Lestari, Febrianti
Journal of Coastal and Ocean Sciences Vol. 5 No. 3 (2024): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.5.3.208-214

The condition of coral reefs is still good on Mapur Island, which benefits community activities such as fishing and marine tourism. However, continuous activities can degrade the coral reef ecosystem, so the government has made it a Marine Conservation Area for the Eastern Region of Bintan Island. This research aims to determine the ecological condition of coral reefs on Mapur Island, the influence of the coral reef ecosystem on socio-economics, as well as the impacts felt before it was designated and after it was designated as a conservation area in Mapur Village, Marine Conservation Area in the Eastern Region of Bintan Island. The results show that increasing live coral cover and decreasing dead coral cover have shown a positive recovery trend. Establishing a coral reef ecosystem conservation area in Mapur Village has several substantial impacts. Even though most people have good knowledge and perception about the function and benefits of conservation areas, primarily as fish habitats, the main challenge still lies in access to infrastructure, which is considered inadequate. The economic impact of establishing a conservation area is not yet significant because most people do not see a substantial increase in income. However, the community feels support for their livelihoods through the sustainability of fish resources. Changes in coral cover on the socio-economic conditions of the people of Mapur Island influence the ecosystem and local communities, fisheries and marine resources, the marine tourism sector of Mapur Village, natural resource management, direct economic influence, diversification of livelihoods, education, and environmental awareness, improving infrastructure and facilities, as well as challenges and limitations

Fishery Product Consumption Rate in Bintan Pesisir District, Bintan Regency Adrinal, Adrinal; Nevrita, Nevrita; Apdilah, Dony
Jurnal Perikanan dan Kelautan Vol. 26 No. 2 (2021): June
Publisher : Faculty of Fisheries and Marine, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.26.2.137-140

Bintan Regency currently consists of 272 large and small islands. The Bintan Pesisir District was formed based on the Bintan Regency Regional Regulation Number 12 of 2007. The preparation of this scientific article was carried out in April 2021 in the Bintan Pesisir District, especially the Kelong, Numbing, Mapur and Air Glubi villages using descriptive analysis based on a literature review using secondary data as a source of information. The consumption rate of fishery products in the Bintan Pesisir District has increased every year. In 2017 the volume of fishery production in the coastal Bintan District produced 7,587.27 tons, in 2018 it was 7,753.88 tons and while in 2019 the Bintan Pesisir District produced 7,884.60 tons

The Effect of Coral Reef Ecological Changes on the Socio-Economic Community in Mapur Village Adrinal, Adrinal; Wahyudin, Wahyudin; Lestari, Febrianti
Journal of Coastal and Ocean Sciences Vol. 5 No. 3 (2024): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.5.3.208-214

The condition of coral reefs is still good on Mapur Island, which benefits community activities such as fishing and marine tourism. However, continuous activities can degrade the coral reef ecosystem, so the government has made it a Marine Conservation Area for the Eastern Region of Bintan Island. This research aims to determine the ecological condition of coral reefs on Mapur Island, the influence of the coral reef ecosystem on socio-economics, as well as the impacts felt before it was designated and after it was designated as a conservation area in Mapur Village, Marine Conservation Area in the Eastern Region of Bintan Island. The results show that increasing live coral cover and decreasing dead coral cover have shown a positive recovery trend. Establishing a coral reef ecosystem conservation area in Mapur Village has several substantial impacts. Even though most people have good knowledge and perception about the function and benefits of conservation areas, primarily as fish habitats, the main challenge still lies in access to infrastructure, which is considered inadequate. The economic impact of establishing a conservation area is not yet significant because most people do not see a substantial increase in income. However, the community feels support for their livelihoods through the sustainability of fish resources. Changes in coral cover on the socio-economic conditions of the people of Mapur Island influence the ecosystem and local communities, fisheries and marine resources, the marine tourism sector of Mapur Village, natural resource management, direct economic influence, diversification of livelihoods, education, and environmental awareness, improving infrastructure and facilities, as well as challenges and limitations.

Revegetasi Lahan Bekas Tambang Batu Bara Dengan Beberapa Jenis Tanaman Dan Pengaruhnya Terhadap Makro Fauna Tanah Sawahlunto Sumatera Barat Emalinda, Oktanis; Adrinal, Adrinal; Rahayu, Clara; Sandi , Nofrita
Agrium Vol 22 No 2 (2025)
Publisher : Faculty of Agriculture, Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/agrium.v22i2.22589

Kegiatan penambangan batubara menimbulkan berbagai kerusakan lahan, terutama terganggunya aktivitas makro fauna tanah. Usaha untuk memulihkan kembali lahan ini adalah melakukan kegiatan revegetasi dengan penanaman tanaman pionir. Tujuan penelitian ini adalah untuk mengetahui pengaruh jenis tanaman revegetasi terhadap makro fauna tanah pada lahan bekas tambang batubara di Kota Sawahlunto. Pengambilan sampel dilakukan dengan metoda survei secara purposive sampling pada tiga jenis tanaman revegetasi, yaitu tanaman Akasia, Sengon dan Balik angin. Sampel tanah diambil di tengah kanopi tanaman dengan kedalaman 0-30 cm. Hasil penelitian menunjukkan bahwa populasi makro fauna tanah tertinggi ditemukan pada lahan tanaman sengon (7 ekor cacing dan 6 ekor semut), lahan tanaman akasia (6 ekor cacing dan 4 ekor semut) dan terendah pada lahan tanaman balik angin (6 ekor semut dan 3 ekor cacing). Keragaman makro fauna tanah pada lahan revegetasi terdiri dari 2 jenis (cacing dan semut). Frekuensi keberadaan adanya jenis cacing lebih tinggi terdapat pada lahan tanaman balik angin (0,66), diikuti lahan tanaman akasia (0,60) dan terendah pada lahan tanaman sengon (0,58). Frekuensi keberadaan jenis yang terdapat semut lebih tinggi pada lahan tanaman sengon (0,41), diikuti lahan tanaman akasia (0,40) dan terendah pada lahan tanaman balik angin (0,33). Nilai kekayaan jenis pada lahan tanaman balik angin (0,45) lebih tinggi dibandingkan lahan tanaman akasia (0,43) dan sengon (0,40). Hasil penelitian menunjukkan terdapat makro fauna tanah dan kegiatan revegetasi lahan bekas tambang batubara harus dilakukan untuk memperbaiki kesuburan tanah dengan menanam berbagai jenis tanaman revegetasi. Kata Kunci: Makro fauna, Tanaman revegetasi, Tambang batubara

Assessing the Impact of Terra Preta from Rice Husk on Soil, Rice Plant Growth, and Yield in the System of Rice Intensification (SRI) Adrinal, Adrinal
JOURNAL OF TROPICAL SOILS Vol 30, No 3: September 2025 (in Progress)
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i3.%p

The practice of intensive rice field cultivation and the excessive application of chemical fertilizer often lead to issues such as a gradual decline in soil quality and fertility, as well as enviromental pollution. By employing Tetadi as ameliorant technology and adopting SRI cultivation techniques, it is hoped that we can mitigate the negative effects on rice fields. This study was aimed to examine the effect of Tetadi on physical properties of paddy soil, growth, and rice yield on SRI method. The experiments were conducted in paddy fields in Pasar Ambacang, Kuranji, Padang city, and the experimental were application of Tetadi A=0 tons/ha, B=5 tons/ha, C= 10 tons/ha, D= 15 tons/ha, E= 20 tons/ha. The data were compared to the criteria of soil physical properties and plant data were statistically analysed for the variance. The results showed that the change has an insignificant impact on soil physical properties, yet decrease BD by 28.2%; increase SOM by 18.55%; TRP by 13.7%, moisture content 5.6%; permeability by 34.2%, and PAT by 20%. Application of 20 tons/ha Tetadi increased number of productive saplings 52.65% as well as the yield by 69.46% compared to the treatment without Tetadi application.

Changes of Soil Properties on Various Ages of Rubber Trees in Dhamasraya, West Sumatra, Indonesia Yasin, Syafrimen; Adrinal, .; Junaidi, .; Wahyudi, Erick; Herlena, Silvia; Darmawan, .
JOURNAL OF TROPICAL SOILS Vol. 15 No. 3: September 2010
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2010.v15i3.221-227

Changes of Soil Properties on Various Ages of Rubber Trees in Dhamasraya, West Sumatra, Indonesia (S Yasin, Adrinal, Junaidi, E Wahyudi, S Herlena and Darmawan): Although rubber has been planted in Indonesia from Holland era, but there is little information about the effect of rubber plantation on the rate of land degradation in Indonesia.Â In order to examine the effect of rubber tree (Hevea brasiliansis) ages on land degradation status, a series experiment was done in Dhamasraya district as the main contributor of natural rubber in West Sumatra, Indonesia. Study site divideÂ into forest (A), crab grass (B), and rubber plantation with ages ranged from 1 (C), 5 (D), 10 (E), 15 (F) and 20 (G) years were selected as study sites and soil samples had been taken from each site, where forest soilÂ was used as a control. The result proved that the age of rubber tree has strongly affected physical and chemical properties of soil. Organic carbon and total nitrogen content decreased from 3.02%, 2.66%, 1.96%, in site A, B and C, and then increased to 2.33% and 2.49% in site D and E, respectively. This result was opposed with bulk density (BD) value of each site. The highest BD found in site C (1.26 g cm-3), followed by site D, E, B and A with 1.24, 1.14, 1.12 and 0.88 g cm-3, respectively. The similar pattern was also found for selected chemical properties of soil. Soil pH, available phosphorous, exchangeable base cations, cation exchange capacity and base saturation was likely to decrease from 1 to 10 years old plantation and then increased close the natural condition (reflected by forest soil) at 20 years old rubber tree. Since most of plantation was conversed from natural forest, this phenomenon might be because of contribution of organic matter from original condition and addition of fertilizer at the beginning of plantation establishment.

Leaching Behaviour of Nitrogen in Forage Rice Cultivation that Applied with Animal Manure Gusmini, .; Nishimura, Kazuyuki; Adrinal, .; Itani, Tomio
JOURNAL OF TROPICAL SOILS Vol. 18 No. 3: September 2013
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2013.v18i3.209-216

Increased use of N fertilizer may substantially increase of nitrate nitrogen (NO3-N) leaching, which potentially pollutes groundwater.Â Leaching behaviour of nitrogen (N) was observed in the paddy field of forage rice cultivation. Two kinds of animal manure, cattle manure (CM) and poultry manure (PM) at 5 levels of N application (0, 70, 140, 210, 280 kg N ha-1) as the organic N sources, and without any chemical fertilizers. â€œTachisuzukaâ€ forage rice variety was conducted in the experimental plot. Porous ceramic cups were installed in triplicate of each treatment at 45 cm depth to collect the percolation water samples during the cultivation rice periods. The concentration of total N, NH4-N, NO2-N and NO3-N of water (surface and percolation) and soil sample solution were analysed using a Hach DR/2800 spectrophotometer. Result showed that NO3-N leaching was higher than NH4-N in the percolation water during the cultivation of forage rice periods. The highest NO3-N leaching was found in 280 kg N ha-1 (6.3 mg L-1), that it was indicated on the polluted levels. The highest of biomass production was in N280 (16.22 t ha-1) and nearly similar result in N140, N210 and N280. It was concluded that the best application of N-fertilizer in 140 kg N ha-1 because it greatly enhanced N-fertilizer efficiency, and decreased steadily of NO3-N concentration leaching in the environment of the groundwater.Keywords: Ammonium (NH4-N), Forage rice, N behavior, Nitrate (NO3-N), N leaching[How to Cite: Gusmini, K Nishimura, Adrinal, and T Itani. 2013. Leaching Behaviour of Nitrogen in Forage Rice Cultivation that Applied with Animal Manure. JTrop Soils 18 (3): 209-216. Doi: 10.5400/jts.2013.18.3.209][Permalink/DOI: www.dx.doi.org/10.5400/jts.2013.18.3.209]REFERENCESAgrawal GD, SK Lunkad and T Malkhed. 1999. Difusse agricultural nitrate pollution of groundwater in India. Water Sci Technol 20: 67-75.Asada K, T Nishimura, C Kato, K Toyota and M Hosomi. 2013. Phyto-purification of livestock-derived organic waste by forage rice under subtropical climate. Paddy Water Environ 11: 559-571.Kamiji Y and T Sakuratani. 2011. Analysis of Optimum Spikelet Number and Plant N in Rice at Tanazawa Paddy Field. J Agric Sci 56: 93-102.Kato H. 2008. Development of rice varieties for whole crop silage (WCS) in Japan. JARQ 42: 231-236.Keeney DR. 1982. Nitrogen management for maximum efficiency and minimum pollution. In: Stevenson FJ (ed). Nitrogen in Agricultural Soils. Agron. Monogr. 22. ASA, CSSA, and SSSA, Madison. Wisc,Â pp 605-649.Kumazawa K. 2002. Nitrogen fertilization and nitrate pollution in groundwater in Japan: Present status and measures for sustainable agriculture. Nutr Cyc Agroecocyst 63: 129-137.Kyaw KM, K Toyota, M Okazaki, T Motobayashi and H Tanaka. 2005. Nitrogen balance in a paddy field planted with whole crop rice (Oryza sative cv. Kusahonami) during two rice-growing seasons. Biol Fertil Soils 42: 72-82.Liu GD, WL Wu and S Zhang. 2005. Regional differentiation of non-point source pollution of agriculture-derived nitrate nitrogen in groundwater in northern China. Agric Ecosys Environ. 107: 211-220.Matsushita K, S Iida, O Ideta, Y Sunohara, H Maeda, Y Tamura, S Kouno and M Takakuwa. 2011. â€œTachisuzukaâ€, a new rice cultivar with high straw yield and high sugar content for whole-crop silage use. Breeding Sci 61: 86-92.Ministry of Agriculture, Forestry and Fisheries (MAFF). 2013. Recent situation and research of rice for whole crop silage in Japan. Accessed 18 August 2013.Ookawa T, K Yasuda, H Kato, M Sakai, M Seto, K Sunaga, Motobayashi, S Tojo and T Hirasawa. 2010. Biomass production and lodging resistance in â€˜Leaf Starâ€™, a new long-culm rice forage cultivar. Plant Prod Sci 13: 58-66.Okajima H and H Imai. 1973. Nutrient supplying power of soils. II. Contribution of mass flow to the nutrient supply in flooded rice fields. Jpn J Soil Sci Plant Nutr 44: 296-300. Sahu SK and PK Samant. 2006. Nitrogen loss from rice soil in Orissa. Orissa Review. India. Sakai M, S Iida, H Maeda, Y Sunohara, H Nemoto and T Imbe. 2003. New rice varieties for WCS use in Japan. Breed Sci 53: 271-275.Sakai M, M Okamoto, K Tamura, R Kaji, R Mizobuchi, H Hirabayashi, T Yagi, M Nishimura and S Fukaura. 2008. â€œTachiaobaâ€, high yielding rice variety for whole crop silage. Breed Sci 58: 83-88.Suprapti H, M Mawardi and D Shiddieq. 2010. Nitrogen transport and distribution on paddy rice soil under water efficient irrigation method. Paper Presented on International Seminar of ICID, Yogyakarta. Indonesia. Toriyama K and H Ishida. 1987. Method of estimating time of NH4-N disappearance in paddy field by soil solution analysis. Jpn J Soil Sci Plant Nutr 58: 747-749.Wang MY, MY Siddiqi, TY Ruth and ADM Glass. 1993. Ammonium uptake by rice roots. II. Kinetic of 13NH4+ influx across the plasmalemma. Plant Physiol 103: 1259-1267.Wang JY, SJ Wang and Y Chen. 1995. Leaching loss of nitrogen in double-rice-cropped paddy fields in China. Acta Agricul Zhejiangensis 7: 155-160.Zhu JG, Y Han, G Liu, YL Zhang and XH Shao. 2000. Nitrogen in percolation water in paddy fields with a rice/wheat rotation. Nutr Cycl Agroecosyst 57: 75-82.Zhuo S and M Hosomi. 2008. Nitrogen transformations and balance in a constructed wetland for nutrient polluted river water treatment using forage rice in Japan. Ecol Eng 32: 147-155.Zhuo S, H Iino, S Riya, M Nishikawa, Y Watanabe and M Hosomi. 2011. Nitrogen transformations in paddy field applied with high load liquid cattle waste. J Chem Engin Jpn 44: 713-719.

Assessing the Impact of Terra Preta from Rice Husk on Soil, Rice Plant Growth, and Yield in the System of Rice Intensification (SRI) Adrinal, Adrinal
JOURNAL OF TROPICAL SOILS Vol. 30 No. 3: September 2025 (in Progress)
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i3.%p

The practice of intensive rice field cultivation and the excessive application of chemical fertilizer often lead to issues such as a gradual decline in soil quality and fertility, as well as enviromental pollution. By employing Tetadi as ameliorant technology and adopting SRI cultivation techniques, it is hoped that we can mitigate the negative effects on rice fields. This study was aimed to examine the effect of Tetadi on physical properties of paddy soil, growth, and rice yield on SRI method. The experiments were conducted in paddy fields in Pasar Ambacang, Kuranji, Padang city, and the experimental were application of Tetadi A=0 tons/ha, B=5 tons/ha, C= 10 tons/ha, D= 15 tons/ha, E= 20 tons/ha. The data were compared to the criteria of soil physical properties and plant data were statistically analysed for the variance. The results showed that the change has an insignificant impact on soil physical properties, yet decrease BD by 28.2%; increase SOM by 18.55%; TRP by 13.7%, moisture content 5.6%; permeability by 34.2%, and PAT by 20%. Application of 20 tons/ha Tetadi increased number of productive saplings 52.65% as well as the yield by 69.46% compared to the treatment without Tetadi application.

Community Empowerment Strategy for the Development of Aren Sugar Production Center in Koto Malintang, Lake Maninjau, West Sumatra Anwar, Aswaldi; Utami, Ami Sukma; Wisnubroto, Muhammad Parikesit; Adrinal, Adrinal; Khairul, Ujang; Pratama, Rafdi; Adib, Muhammad; Prasetyo, Rival; Susila, Rahma; Itra, Novi Rahmat
Buletin Dharmas Andalas Vol. 2 No. 2 (2025): Buletin Dharmas Andalas
Publisher : Departemen Budidaya Tanaman Perkebunan, Fakultas Pertanian, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/bda.v2i2.43

This community service program was implemented in Koto Malintang, West Sumatra, to empower farmer groups through the development of an Aren sugar (Arenga pinnata) production center. The activities consisted of pre-surveys, focus group discussions (FGDs), socialization workshops, participatory planning, and initial demonstrations of intercropping practices. A key component of the program was the financial feasibility analysis, designed to provide farmers and stakeholders with evidence-based tools for decision-making. The analysis was conducted using production costs and revenues from the research location, with a 15-year horizon and a 10% discount rate. Two cultivation scenarios were evaluated: (1) Aren intercropped with seasonal crops and (2) Aren intercropped with robusta coffee. Each scenario considered two product alternatives: molded sugar (gula cetak) and palm sugar crystals (gula semut). The results revealed that molded sugar offered only marginal feasibility, with Net Present Values (NPV) of Rp 28–35 million/ha, Internal Rates of Return (IRR) of 12–15%, Benefit-Cost (B/C) ratios around 1.1, and payback periods of 7–8 years. In contrast, palm sugar crystals showed strong financial viability, with NPVs of Rp 298–330 million/ha, IRRs of 38–45%, B/C ratios of 2.4–2.6, and payback periods of only 4–5 years. Sensitivity analysis confirmed robustness across discount rates of 8–12% and price variations between Rp 40,000–60,000/kg. These findings suggest that palm sugar crystals should be prioritized as the flagship product for Koto Malintang’s Aren sugar industry, supported by institutional strengthening, diversification, and modern marketing to ensure sustainability.

PHYSICAL CHARACTERISTICS OF ULTISOLS AND THE IMPACT ON SOIL LOSS DURING SOYBEAN (Glycine max Merr) CULTIVATION IN WET TROPICAL AREA Yulnafatmawita, Yulnafatmawita; Adrinal, Adrinal
AGRIVITA Journal of Agricultural Science Vol 36, No 1 (2014)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v36i1.350

Physical characteristicsare among soil propertiesaffecting the susceptibility to erosion. Determination of physical characteristics of Ultisol was aimed to evaluate the dynamics of soil properties as well asthe impact on soil erosion and runoff (RO) during soybean cultivation in wet tropical area. Soybean was planted within erosion plots (18 m2) at 25% slope in UltisolLimauManis (having > 5000 mm annual rainfall). Soil samples for physical properties (soil texture, bulk density, total pore, permeability, aggregate stability,and organic carbon) as well as amount of RO and soil loss were analyzed at 5 different times (stages) during the cultivation. The results showed that there was fluctuation in physical properties of Ultisol during the cultivation. Likewise, the amount of runoff and soil loss also changed during the study. Among the physical properties analyzed, the aggregate stability index of the soil highly correlated to the amount of RO (R2=0.73) and soil loss (R2=0.94). Amount of RO and soil loss was controlled by soybean development at the average rainfall intensity ≤ 36 mm/day, but not at rainfall intensity >36 mm/day. It is suggested not to open heavily clayey-low OC soils for seasonal crop farming during rainy season in wet tropical area. Keywords: soil physical properties, Ultisol, erosion,runoff, soybean cultivation

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