scholarly journals Effects of different stocking densities and supplementation with Saccharomyces cerevisiae in juvenile Nile tilapia cultivated in a recirculating water system (RAS)

2021 ◽  
Vol 10 (16) ◽  
pp. e183101623385
Author(s):  
André Freccia ◽  
Fernanda Picoli ◽  
Jonis Baesso Ghizzo ◽  
Miguel Faust ◽  
Eduardo Antonio Sanches ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Nile Tilapia ◽  
Block Design ◽  
Water System ◽  
Stocking Density ◽  
Yeast Saccharomyces Cerevisiae ◽  
Randomized Block Design ◽  
Liver Health ◽  
Recirculating Water System ◽  
Specific Growth Rates

The objective of this study was to evaluate the productive performance, organosomatic indices and liver-intestinal histomorphometric parameters of Nile tilapia (Oreochromis niloticus) juveniles, fed diets containing probiotics (yeast - Saccharomyces cerevisiae) and reared at different densities of storage. In this experiment, 450 juveniles of tilapia (2.9 ± 0.23 g) were distributed in 18 experimental units arranged in RAS and arranged in a randomized block design in a 2x3 factorial scheme. These animals were fed two diets, the first without yeast and the second containing 0.1% yeast inclusion and distributed in three stocking densities of 15, 25 and 35 fish / m3 (500, 833 and 1166 fish / m3). There was an improvement in the oxygenation of the medium with the use of yeast, as well as in the lowest stocking densities evaluated (15 and 25 fish / m³). However, lower specific growth rates and higher viscerosomatic index were observed in animals supplemented with 0.1% yeast. For the average area of hepatocytes, there was an interaction between the evaluated factors (use of probiotic x storage density), where the best values were found in the lowest storage densities (15 and 25 fish / m³), regardless of use or not of the probiotic. It is recommended to use a stocking density of 15 to 25 fish / m³ and a supplementation of 0.1% with yeast as a probiotic, in order to improve liver health and oxygenation of the water used to grow Nile tilapia juveniles cultivated in RAS.

scholarly journals Association between periphyton and bioflocs systems in intensive culture of juvenile Nile tilapia

2016 ◽  
Vol 38 (2) ◽  
pp. 119 ◽  
Author(s):  
Davi De Holanda Cavalcante ◽  
Francisco Roberto dos Santos Lima ◽  
Vanessa Tomaz Rebouças ◽  
Marcelo Vinícius do Carmo e Sá
Keyword(s):  
Water Quality ◽  
Growth Rate ◽  
Nile Tilapia ◽  
Specific Growth ◽  
Block Design ◽  
Intensive Culture ◽  
Effluent Quality ◽  
Intensive Farming ◽  
Randomized Block Design ◽  
Underwater Structure

The present work aimed at determining the effects of the association between the periphyton-based system with the bioflocs-based system in the intensive culture of juvenile Nile tilapia (1.56 ± 0.07 g; 72 fish m-3), on variables of water quality, growth performance and effluent quality after 10 weeks. The experiment was arranged in a 2 x 2 factorial randomized block design with four treatments and five repetitions each. The factors tested were the following: ‘underwater structure’ (absence and presence) and ‘adjustment of the C: N ratio of water’ (no and yes). The final fish body weight, specific growth rate and yield were higher (p < 0.05) in the C: N-adjusted tanks. The presence of submerged structures in the tanks had no significant influence on those same variables. It was concluded that the periphyton-based system is not indicated for intensive farming of Nile tilapia, in which there is a high allowance of artificial feed to fish. 

scholarly journals Agroecosystem Management Practices on some Cucumber Plant Parameters using Integrated Fertilization under Green House

2019 ◽  
Vol 31 (2) ◽  
pp. 68-75
Author(s):  
Akram M. Abdul Rahman ◽  
Allaaddin Yüksel
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Humic Acid ◽  
Leaf Area ◽  
Management Practices ◽  
Block Design ◽  
Cucumber Plant ◽  
Plant Type ◽  
Total Leaf Area ◽  
Yeast Saccharomyces Cerevisiae ◽  
Agroecosystem Management

This study was conducted in Tainal watershed, Bazian City, west of Sulaimaniyah, north of Iraq (35º57’31’’N, 45º 17’98’’E), the soil fertility was analyzed before the application of kinds of soil biofertilizer like dry yeast Saccharomyces cerevisiae with two concentrations (5g-L, 10 g-L) of dry yeast. Biofertilizers, organic matter like humic acid and chemical fertilizer for more comparison and water as a control. Results using dry yeast (10 g-L) have significant differences in (P?0.05) on the vegetable parameters, plant height, leaf area, yield, the number of harvest day and the weight of root system. Also the humic acid and biofertilizers have a significant effect (P?0.05). The yeast (10 g/L) have significant differences on (P?0.05) on yield (1.3 ton/ha) comparing with control of 48.73 kg/5 m2, and the total leaf area of 1.5 m2 comparing with the control 1.16 m2. The experiment was performed as factorial with randomized completely block design (R.C.B.D) on Cucumber plant type of (SAIF F1) with three replicates; each unit from the 18 unite (plot) contained 18 cucumber plant. The data were analyzed by using XLSTAT program statistically analyst.

scholarly journals Pertumbuhan, hasil, dan kandungan kromium kangkung darat akibat kombinasi macam dan dosis bahan organik pada media tanam tercemar

Kultivasi ◽  
2019 ◽  
Vol 18 (3) ◽  
Author(s):  
Intan Nurcahya ◽  
Noertjahyani Noertjahyani ◽  
Hudaya Mulyana
Keyword(s):  
Heavy Metal ◽  
Block Design ◽  
Organic Fertilizer ◽  
Water System ◽  
Growth Yield ◽  
Dry Weight ◽  
Growth And Yield ◽  
Water Spinach ◽  
Polluted Soils ◽  
Randomized Block Design

Sari. Kangkung darat merupakan salah satu tanaman yang dapat menyerap logam berat. Hal ini berkaitan dengan pertumbuhan, hasil, dan keamanan kangkung sebagai bahan konsumsi. Pencemaran lahan pertanian dapat disebabkan dari kegiatan industri, salah satunya yaitu limbah penyamakan kulit yang mengandung logam berat kromium yang mengairi lahan pertanian. Pemberian bahan organik merupakan salah satu cara untuk meningkatkan hasil tanaman kangkung darat dan menyerap logam berat. Penelitian bertujuan untuk mengetahui pengaruh kombinasi macam dan dosis bahan organik pada media tercemar kromium penyamakan kulit terhadap pertumbuhan, hasil dan kandungan kromium pada tanaman kangkung darat. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) dengan sembilan perlakuan dan tiga kali ulangan. Perlakuan kombinasi macam dan dosis bahan organik terdiri dari serasah daun, pupuk kandang kambing, dan kascing dengan dosis masing-masing 5 t ha-1, 10 t ha-1dan 15 t ha-1. Hasil penelitian menunjukkan bahwa perlakuan kombinasi macam dan dosis bahan organik pada media tercemar kromium penyamakan kulit berpengaruh nyata terhadap pertumbuhan, dan hasil tanaman kangkung darat. Kombinasi kascing 15 t ha-1 memberikan pengaruh yang lebih baik terhadap tinggi tanaman, bobot segar per tanaman, dan bobot kering per tanaman, sedangkan pemberian serasah daun 5 t ha-1 menghasilkan tanaman kangkung darat dengan kandungan kromium yang lebih rendah (51,33 mgkg-1) dibandingkan perlakuan lainnya tetapi tanaman dengan kadar tersebut belum aman untuk dikonsumsi.Kata Kunci : kangkung darat, bahan organik, kromium, hasilAbstract. Water spinach is a heavy metal accumulator plant if grown in polluted soils. This raises the concern of water spinach safety as one of the most consumed vegetables in Asian household. Land pollution in water spinach cultivation area can be caused by industrial activities that involve heavy metals such as tannery. Industrial waste such as chrome leaches to the water system that eventually will be used as irrigation source for agriculture. Organic fertilizer is a potential solution to increase water spinach growth, yield, and absorb heavy metal contaminants. This research evaluated the effect of type and dosage of organic fertilizer on water spinach that grown in chromium-polluted soils. This research design used Randomized Block Design (RBD) with nine treatments and three replication. The treatment of combination of types and dosages of organic fertilizer. There were dried leaves, goat manure, and vermicompost with dosage of 5 t ha-1, 10 t ha-1 and 15 t ha-1. The results of this research showed that the effect of combination of organic fertilizer type and dosages at chrome polluted media gave better effect on growth, and yield of water spinach. Giving vermicompost of 15 t ha-1 gaves better effect on plant height, fresh weight of plant, and dry weight of plant, meanwhile the doses of 5 t ha-1dried leaves showed the lowest chrome content compared to other treatments, but these plants are still unsafe for consumption due to high chrome content.Keywords: water spinach, organic fertilizer, chromium, yield

scholarly journals SEDATION OF NILE TILAPIA WITH ESSENTIAL OILS: TEA TREE, CLOVE, EUCALYPTUS, AND MINT OILS

2017 ◽  
Vol 30 (2) ◽  
pp. 479-486 ◽  
Author(s):  
FABRÍCIO PEREIRA REZENDE ◽  
LÍVIA MENDONÇA PASCOAL ◽  
RAFAEL ALVES VIANNA ◽  
EDUARDO ARRUDA TEIXEIRA LANNA
Keyword(s):  
Essential Oils ◽  
Nile Tilapia ◽  
Block Design ◽  
Tea Tree ◽  
Behavioral Stress ◽  
Randomized Block Design ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Management Procedures ◽  
Commercial Applications ◽  
Reducing Stress

ABSTRACT Essential oils have been extensively used in many commercial applications, one of them being anesthetics. The effect of four essential oils (tea tree, clove, eucalyptus, and mint oils) on the sedation, recovery, and behavioral stress of Nile tilapia (Oreochromis niloticus) was evaluated. The sedative solutions, prepared with essential oils and anhydrous ethanol (1:4), were used for fish management procedures at a dose of 7.4 mL L-1 in a completely randomized block design with four treatments and seven replicates. The means were compared using Scott-Knott test (P < 0.05). Clove oil was found to be the most suitable oil for the immobilization of Nile tilapia; however, behavioral observations indicate that tea tree oil was the most efficient in reducing stress.

scholarly journals THE APPLICATION OF DRY RUBBER LATEX AND VERMICOMPOST TO PLANT WATER CONSUMPTION AND THE GROWTH OF PADDY ON SWAMPY LAND

2021 ◽  
Vol 7 (2) ◽  
pp. 82-88
Author(s):  
Widya Irmawati ◽  
Siti Masreah Bernas ◽  
Bakri Bakri
Keyword(s):  
Rice Plant ◽  
Block Design ◽  
Water System ◽  
Soil Surface ◽  
High Yield ◽  
Plant Water ◽  
Rubber Latex ◽  
Randomized Block Design ◽  
Evapotranspiration Rate ◽  
Average Water

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.

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