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All Journal Journal of Tropical Soils Maspari Journal BIOVALENTIA: Biological Research Journal
Siti Masreah Bernas
Program Studi Pengelolaan Lingkungan Program Pascasarjana, Universitas Sriwijaya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology Medicine & Pharmacology

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HUBUNGAN PANJANG-BERAT DAN POLA PERTUMBUHAN IKAN DI MUARA SUNGAI MUSI KABUPATEN BANYUASIN SUMATERA SELATAN ., Nurhayati; ., Fauziyah; Bernas, Siti Masreah
Maspari Journal : Marine Science Research Vol 8, No 2 (2016): Edisi Juli
Publisher : UNIVERSITAS SRIWIJAYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (616.287 KB) | DOI: 10.36706/maspari.v8i2.3487

Abstract

Muara  Sungai  Musi  Kabupaten  Banyuasin  Sumatera  Selatan  berperan sebagai daerah penangkapan  ikan,  pemukiman  penduduk,  dan  sarana transportasi. Seiring  perjalanan waktu,  aktivitas  ini  menjadi  tekanan  pada keberlangsungan organisme  perairan, khususnya ikan. penelitian ini bertujuan untuk mengidentifikasi  hubungan panjang berat dan  pola  pertumbuhan  ikan. Hasil penelitian  menunjukkan  bahwa  dari  624  individu  26 spesies 18 famili ikan diperoleh nilai-nilai koefisien korelasi (R2) berkisar 0,405-0,997. Hal ini menunjukkan  bahwa  pertambahan  berat  sekitar  41%-100%  dapat dijelaskan oleh besarnya  pertambahan  panjang  melalui  hubungan  regresi. Pola pertumbuhan  ikan sebanyak  7,7%  bersifat  isometrik,  53,8%  bersifat allometrik  positif,  dan  38,5%  bersifat allometrik  negatif.  Mayoritas pertambahan  berat  lebih  cepat  daripada  pertambahan panjang.KATA KUNCI: Muara sungai, panjang-berat ikan.
EFFECT OF WATER CONTENT AND SOIL IMPROVEMENT (HYDROGEL) ON PEAT FIRE SUPPRESSION Muizzaddin, Muizzaddin; Bernas, Siti Masreah; Sarno, Sarno
BIOVALENTIA: Biological Research Journal Vol. 7 No. 1 (2021)
Publisher : Biology Department, Faculty of Mathematics and Natural Sciences, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1110.316 KB) | DOI: 10.24233/biov.7.1.2021.215

Abstract

Forest and land fires are Indonesia's biggest problem which has continued from 2014 to the present. The number of activities to find the best solution in fire is something that has been done until now. Various methods, both preventive and repressive, have been implemented to prevent forest and land fires from occurring. This research aims to be a sureextinguishing gel, namely hydrogel, which can be used in efforts to extinguish forest and land fires. Extinguishing forest and land fires using hydrogel is a new method that is expected to prevent forest and land fire zones from spreading. This research shows that the tendency of decreasing the average water content of peat due to the drying process based on different intervals of oven time, namely the lowest yield ranged from 61.25% to the highest with a water content of 109.57%.
THE APPLICATION OF DRY RUBBER LATEX AND VERMICOMPOST TO PLANT WATER CONSUMPTION AND THE GROWTH OF PADDY ON SWAMPY LAND Irmawati, Widya; Bernas, Siti Masreah; Bakri , Bakri
BIOVALENTIA: Biological Research Journal Vol. 7 No. 2 (2021)
Publisher : Biology Department, Faculty of Mathematics and Natural Sciences, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (522.089 KB) | DOI: 10.24233/biov.7.2.2021.223

Abstract

Swampy land is an alternative for rice plant cultivation where the amount of rainfall has an impact on the amount of inundation. In order to provide appropriate water for rice plants, especially during the dry season, an irrigation water system is required for its control.Alternative materials such as dry rubber latex and vermicom-post can be utilized to reduce water use and ensure that water is delivered as efficiently as possible. The goal of this study was to see how dried rubber latex on the soil surface and vermicompost in the soil affected rice plant water demand and growth. This research was conducted from November 2020 – February 2021. The study used a factorial randomized block design (RAKF) with 2 treatments, covered dry rubber latex variations (K), K0 (0%), K1 (25%), K2 (50%), K3 (75%), and vermicompos (V), V0(0 g), V1(58.82 g), V2(117.64 g), V3 (176.46 g)with 3 rep-licat. So that the total treatmentsare 48 treatments.The results showed that the application of dry rubber latex and vermicompost significantly affected the number of leaves and the number of tillers. The K3 treatment (75%) was the best because it had the smallest evapotranspiration rate with an average of 1.2 mm day-1. The K3 treatment (75%) had the smallest average water requirement of 1.6 mm day-1 with an average number of 37.07 leaves. The high yield of K3 treatment was due to the wider the area covered by 75% (K3), the higher the water content, nutrients, and the lower the soil temperature. Closure using dry rubber latex can reduce sunlight so that the process of water loss is lower, and the available nutrients are higher.
Water Table Fluctuation in Tidal Lowland for Developing Agricultural Water Management Strategies Imanudin, Momon Sodik; Armanto, Edi; Susanto, Robiyanto Hendro; Bernas, Siti Masreah
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.v15i3.277-282

Abstract

Water Table Fluctuation in Tidal Lowland for Developing Agricultural Water Management Strategies (MS Imanuddin, E Armanto, RH Susanto and SM Bernas):The research objective is to evaluate the water status in the tertiary block of tidal lowland for developing water management strategies and cropping pattern for food crop agriculture. The research was conducted in tidal lowland reclamation areas of Delta Saleh South Sumatera. The methodology used in this research was survey and monitoring. The result showed that the study area has a potential of acid sulphate soil which is indicated by phyrite layer at 60 cm below the soil surface. Variation of water table was very high in the range of 0-2 cm at rainy season and it was drop up to 90 to 100 cm below soil surface at dry season. This conditions result in the soil oxidation and the pH drop up to 2.5-3.5 (very acid). Analysis of water surplus and deficit during one year period was calculated by surplus excess water under 30 cm (SEW-30) and showed that the area study was experienced water deficit. Analysis of groundwater effect on soil moisture content showed that the critical water level was in 60 cm below soil surface. The soil moisture content at this point in the root zone was dropped into the wilting point level. It means that the water availability for crop water requirement is inadequate. For sustainable agriculture in the area study, the water table should be maintained in 50-60 cm below soil surface. Therefore, the recommendation of water management strategies in the study area is water retention in combination with control drainage system.
Effect of Coffee Pulp Compost and Terrace on Erosion, Run off and Nutrients Loss from Coffee Plantation in Lahat Regency, South Sumatra Bernas, Siti Masreah
JOURNAL OF TROPICAL SOILS Vol. 16 No. 2: May 2011
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2011.v16i2.161-167

Abstract

On some coffee plantations in Lahat Regency South Sumatra, in some places the farmers did not apply agricultural practices, such as tillage, conservation practices, and fertilizers. Many researches have been done to study about effects of organic fertilizer on soil nutrients content and plant growth as well as and the impacts of terrace on soil water content, run-off and erosion. However, there was less research in the highland area. Whereas the possibilityof run off, erosion and nutrient leaching the high land area was high. Thus, it was important to apply terrace and organic coffee pulp in this farm. The aims of this research were to determine the effect of terrace and organic fertilizer on run off and soil erosion, nutrients loss and nutrient content in coffee leaves. Terrace system and organic fertilizer were applied on a one year old coffee plantation in Lahat Regency. Before the treatment applied,coffee pulp as organic fertilizer was decomposed in the chamber for about 2 months. The experiment was conducted in factorial in a Randomized Block Design with two factors. The first factor was coffee pulp compost (0, 3, and 6 Mg ha-1), and the second factor was type of terrace (without, individual, and bund terraces). The size of each plot was 2 m width and 10 m length. Data was analysed by using LSD (Least Significant Different) test. The resultshows that bund terrace reduced runoff and erosion significantly up to 79% (for run off water) and 78% (for eroded soil) compared to without terrace. Organic fertilizer did not affect run off and soil erosion. This may be caused by properties of coffee pulp compost which were fine particulates and the dosages of application were too low to cover soil suface. Bund terrace decreased significantly N, P, K nutrients in soil loss (sediment). The amount of N losswas reduced from 3.37 kg ha-1 per four months (without terrace) to about 0.75 kg ha-1 per four months (bund terrace). Terrace and organic fertilizer did not affect significantly nutrients content in the leaves, but P-content was low without organic fertilizer addition. It is suggested to apply bund terrace and higher organic fertilizer dose on the coffee farm, and further experiments when harvesting the yield (berries) are needed for the second year oldcoffee farm.Keywords: Coffee, compost, erosion, nutrient, pulp, terrace
Identification and Decomposition of Five Dominant Wild plants from Acid Swampland in South Sumatra Bernas, Siti Masreah; Wijaya, Andi; Parlindungan, Effendy Sagala; Fitri, Siti Nurul Aidil
JOURNAL OF TROPICAL SOILS Vol. 20 No. 3: September 2015
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2015.v20i3.149-155

Abstract

There were five emergence plants in swampland such as Polygonum barbatum, Neptunia prostrata, Phragmites karka, Ludwigia adscendens and Phragmites communis, which might be used for compost source, all the plants were easily adapted and grew very well on acid soil.  These plants were choosen because of abudancy and size. All plants were identified, collected, chopped and weighted then put in a 50 liters plastic drum for decomposting during 12 weeks. Composts temperature were monitored every week, nutrients content (N, P, K, Ca, Mg, Na) and compost chemical properties (C-organic, C.E.C., C/N ratio) were analysed every two weeks. Results showed that each compost from different plant varied in nutrients content and chemical properties.  Compost made of Neptunia prostata Lam. contained highest nutrients than others, it’s nutrients were N (4%), P (1675 mg kg-1), K (5.6 %), Ca (0.32 %), Mg (0.32 %) and Na (0.12 %) and the lowest nutrients content showed by compost of Phragmites karka Retz. in which N (2.4 %), P (1160 mg kg-1), K (2.62 %), Ca (0.04 %), Mg (0.07 %), and Na (0.03 %).  It seem broadleaf plants tended to have higher nutrients content than grasses or graminae. Neptunia prostrata compost had a high N content due to it’s leguminosae plant. Al and Fe were low in all composts, therefore all plants were recommended for organic nutrient sources. [How to Cite: Siti MB, A Wijaya, EP  Sagala  and SNA  Fitri. 2015. Identification and Decomposition of  Five Dominant Wild plants from Acid Swampland in South Sumatra. J Trop Soils 20: 149-155. Doi: 10.5400/jts.2015.20.3.149] 
The Influence of Phosphate Fertilizer and Plant Growth Regulators on the Growth and Yield of Ratoon Rice (Oryza sativa L.) Grown on Swampland Fitri, Siti Nurul Aidil; Bernas, Siti Masreah; Sodikin, Erizal; Wijaya, Andi; Apriadi, Ferra
JOURNAL OF TROPICAL SOILS Vol. 23 No. 2: May 2018
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2018.v23i2.73-80

Abstract

This research aimed to study the influence of phosphate fertilizer and plant growth regulator applications on the growth and yield of ratoon rice grown on swampland. The research was conducted in September 2016 to January 2017 at the greenhouse of Department of Soil Science, Faculty of Agriculture, Sriwijaya University. Soil characteristics were analyzed in the Laboratory of Chemistry, Biology and Soil Fertility, Department of Soil Science, Faculty of Agriculture, Sriwijaya University. The experiment was arranged in a factorial Completely Randomized Design.  The first factor was the phospate fertilizer dosages, i.e. 150 kg ha-1 (P1), 200 kg ha-1 (P2), 250 kg ha-1 (P3). The second factor was the plant growth regulator treatments, consisting of control (Z0), Cytokinin 20 ppm (Z1), Gibberellin 60 ppm (Z3). The results showed that the application of P fertilizer did not affect the yield and growth of ratoon rice. However, the application of Plant Growth Regulators resulted in a significant effect on the growth and yield of ratoon rice. The application of Plant Growth Regulator of Gibberellin with the dosage of 60 ppm was able to increase the percentage of filled grains (84.93%), decrease the percentage of empty grains (15.07%), increase the weight of 100 grains (3.63 g) and increase the dry weight of  milled grains (7.80 Mg ha-1). It is suggested that the treatment resulted in better plant growth and yield obtained in the current study might be recommended for ratoon cultivation in swampland.
Co-Authors ANDI WIJAYA Apriadi, Ferra Armanto, M Edi Bakri , Bakri EDI ARMANTO Erizal Sodikin Fauziyah Heri Junedi Irmawati, Widya Momon Sodik Imanuddin Muizzaddin, Muizzaddin Nurhayati . Parlindungan, Effendy Sagala Robiyanto Hendro Susanto Sarno Sarno Siti Nurul Aidil Fitri