scholarly journals Potential Use of Eucalyptus Seedling in Recycling of Fish Farming Wastewater in Agriculture

2019 ◽  
pp. 1-11
Author(s):  
Dalva Paulus ◽  
Ezequiel Toffoli ◽  
Celso Eduardo Pereira Ramos ◽  
Claúdia de Andrade Moura ◽  
Dislaine Becker ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Quality Index ◽  
Eucalyptus Grandis ◽  
Leaf Tissue ◽  
Biomass Accumulation ◽  
Fish Farming ◽  
Production Costs ◽  
Nutrient Sources ◽  
Nutrient Contents ◽  
University Of Technology

Aims: The reuse of fish wastewater in agricultural activities such as the production of seedlings in commercial nurseries has great potential to minimize production costs and to reduce environmental impacts due to the inappropriate disposal of this waste. The objective of this study was to evaluate the growth, development and quality of Eucalyptus grandis W. Hill ex Maiden seedlings produced with different wastewater concentrations from fish farming. Study Design:  The fertigation treatments were using fish farming (Tilapia) wastewater from tanks (FW), daily nutrient solution (DNS), and the combinations of 50% FW + 50% DNS, and 25% DNS + 75% FW, applied daily. Place and Duration of Study: The experiment was carried out from August to December 2016 at the Federal University of Technology of Paraná, Brazil. Methodology: The macro and micronutrient contents in leaf tissue, seedling height, stem diameter, the largest root length, leaf area, fresh and dry shoot and root mass and Dickson quality index were all evaluated. Results: The nutrient contents present in the leaf tissue were adequate for the nutritional demand of the eucalyptus. The seedling quality index (DQI) indicated that the daily nutrient solution (0.21) and 50% FW + 50% DNS (0.20) generated balanced seedlings regarding height and biomass accumulation. Conclusion: Fertigation of eucalyptus seedlings can be carried out with wastewater from fish farming, but it is necessary to complement the fertilization with other nutrient sources to produce quality seedlings which are suitable for field transplantation.

scholarly journals PERIODICITY OF EXPOSURE OF HYDROPONIC LETTUCE PLANTS TO NUTRIENT SOLUTION1

2020 ◽  
Vol 33 (1) ◽  
pp. 81-89
Author(s):  
CLEITON DALASTRA ◽  
MARCELO CARVALHO MINHOTO TEIXEIRA FILHO ◽  
PABLO FORLAN VARGAS
Keyword(s):  
Nutrient Solution ◽  
Block Design ◽  
Nutrient Use Efficiency ◽  
Production Costs ◽  
Fresh Weight ◽  
Solution Flow ◽  
Nutrient Contents ◽  
Randomized Block Design ◽  
Nutrient Use ◽  
Leaf Accumulation

ABSTRACT A balanced periodicity of the nutrient solution flow is essential for better agronomic performances and low production costs in hydroponic systems. Thus, the objective of this work was to evaluate the effect of periodicity of exposure of lettuce plants to the nutrient solution in an NFT hydroponic system on the production, nutrition, and profitability of this crop. The experiment was conducted in a randomized block design with five replications. The treatments consisted of four periodicities of exposure of lettuce plants to the nutrient solution, consisting of intervals of 60, 30, and 15 minutes between pumping periods of 15 minutes; and uninterrupted flow of the nutrient solution. The plants were harvested at 30 days after transplanting, and 15 lettuce plants of each experimental plot were used to determine total fresh weight; root fresh weight; shoot freshweight; and contents of N, P, K, Ca, Mg, S, B, Cu, Fe, Mn, and Zn in shoots, roots, and in the diagnostic leaf; accumulation of these nutrients in shoots and roots; and nitrate and ammonium contents in plant shoot. The highest production and profitability of lettuce were found using uninterrupted nutrient solution flow, which provided higher shoot and root nutrient contents to plants, and resulted in a better nutrient use efficiency.

scholarly journals Anaerobic Mineralization of Recirculating Aquaculture Drum Screen Effluent for Use as a Naturally-Derived Nutrient Solution in Hydroponic Cropping Systems

Conservation ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 151-167
Author(s):  
Joseph Tetreault ◽  
Rachel Fogle ◽  
Todd Guerdat
Keyword(s):  
Nutrient Solution ◽  
Agricultural Waste ◽  
The United States ◽  
Anaerobic Treatment ◽  
Production Costs ◽  
Effluent Treatment ◽  
Limiting Factors ◽  
Fertilizer Treatment ◽  
Recirculating Aquaculture ◽  
Recirculating Aquaculture Systems

Operation and effluent treatment costs are limiting factors for the success of recirculating aquaculture systems (RAS) in meeting seafood demand in the United States. Adopting a capture-and-reuse waste management model similar to terrestrial agriculture farmers would allow RAS farmers to monetize effluent and offset production costs. The moisture content and nutrient profile of RAS effluent makes it a potential option for use as a hydroponic fertilizer. Treatment of RAS waste is needed to mineralize particulate-bound nutrients before becoming a viable hydroponic nutrient solution. Anaerobic treatment (AT), a method used by municipal and agricultural waste treatment facilities to reduce total solids, has been shown to successfully mineralize particulate-bound nutrients from RAS effluent. Continuously mixed anaerobic batch bioreactors were used to evaluate the degree to which AT may mineralize particulate-bound nutrients in solid RAS waste. Concentrations of twelve different macro- and micro-nutrients were analyzed in the waste before and after treatment. Effluent samples were analyzed to determine the fraction of each nutrient in the solid and aqueous forms. This study showed that AT is an effective method to mineralize particulate-bound nutrients in RAS effluent and the mineralization rate data may be used to design a pilot-scaled flow-through RAS effluent treatment system.

scholarly journals Effect of NPK fertilization on production and leaf nutrient content of eucalyptus minicuttings in nutrient solution

2011 ◽  
Vol 35 (1) ◽  
pp. 249-254
Author(s):  
José Pereira Carvalho Neto ◽  
Enilson de Barros Silva ◽  
Reynaldo Campos Santana ◽  
Paulo Henrique Grazziotti
Keyword(s):  
Experimental Design ◽  
Nutrient Solution ◽  
Plant Material ◽  
Management Practice ◽  
Dry Weight ◽  
Nutrient Content ◽  
Fractional Factorial ◽  
Nutrient Contents ◽  
Adequate Nutrient ◽  
Npk Fertilization

Adequate nutrient levels in plants vary according to the species or clone, age and management practice. Therefore, adjustments of the nutrient solution are often necessary according to the plant material for multiplication. This study aimed to evaluate the influence of NPK fertilization on production and leaf nutrient contents of eucalyptus cuttings in nutrient solution. The study was conducted from November 2008 to January 2009 in a greenhouse. The experimental design was completely randomized fractional factorial (4 x 4 x 4)½, with a total of 32 treatments with three replications. The treatments consisted of four doses of N (50, 100, 200 and 400 mg L-1) as urea, P (7.5, 15, 30 and 60 mg L-1) in the form of phosphoric acid and K (50, 100, 200 and 400 mg L-1) in the form of potassium chloride in the nutrient solution. Only the effect of N alone was significant for the number and dry weight of minicuttings per ministump, with a linear decreasing effect with increasing N levels. The highest number of cuttings was obtained at a dose of 50, 7.5 and 50 mg L-1 of N, P and K, respectively.

scholarly journals Evaluation of the throughfall and stemflow nutrient contents in mixed and pure plantations of Acacia mangium, Pseudosamenea guachapele and Eucalyptus grandis

2007 ◽  
Vol 31 (2) ◽  
pp. 339-346 ◽  
Author(s):  
Fabiano de Carvalho Balieiro ◽  
Avílio Antônio Franco ◽  
Renildes Lúcio Ferreira Fontes ◽  
Luiz Eduardo Dias ◽  
Eduardo Francia Carneiro Campello ◽  
...  
Keyword(s):  
Forest Canopy ◽  
Eucalyptus Grandis ◽  
Acacia Mangium ◽  
Tropical Soils ◽  
Low Fertility ◽  
Pure Stand ◽  
Nitrogen Fixing ◽  
Nutrient Input ◽  
Nutrient Contents ◽  
Mixed Plantations

The interception of the rainfall by the forest canopy has great relevance to the nutrient geochemistry cycle in low fertility tropical soils under native or cultivated forests. However, little is known about the modification of the rainfall water quality and hydrological balance after interception by the canopies of eucalyptus under pure and mixed plantations with leguminous species, in Brazil. Samples of rainfall (RF), throughfall (TF) and stemflow (SF) were collected and analyzed in pure plantations of mangium (nitrogen fixing tree -NFT), guachapele (NFT) and eucalyptus (non-nitrogen fixing tree -NNFT) and in a mixed stand of guachapele and eucalyptus in Seropédica, State of Rio de Janeiro, Brazil. Nine stemflow collectors (in selected trees) and nine pluviometers were randomly disposed under each stand and three pluviometers were used to measure the incident rainfall during 5.5 months. Mangium conveyed 33.4% of the total rainfall for its stem. An estimative based on corrections for the average annual precipitation (1213 mm) indicated that the rainfall's contribution to the nutrient input (kg ha-1) was about 8.42; 0.95; 19.04; 6.74; 4.72 and 8.71 kg ha-1 of N-NH4+, P, K+, Ca+2, Mg+2 and Na+, respectively. Throughfall provided the largest contributions compared to the stemflow nutrient input. The largest inputs of N-NH4+ (15.03 kg ha-1) and K+ (179.43 kg ha-1) were observed under the guachapele crown. Large amounts of Na+ denote a high influence of the sea. Mangium was the most adapted species to water competitiveness. Comparatively to pure stand of eucalyptus, the mixed plantation intensifies the N, Ca and Mg leaching by the canopy, while the inputs of K and P were lower under these plantations.

scholarly journals Evaluating the water quality index in dam lake for cold water fish farming

2021 ◽  
pp. 100378
Author(s):  
Hamid Amiri ◽  
Bijan Hadizadeh ◽  
Mehrdad Ghorbani Mooselu ◽  
Sama Azadi ◽  
Amir Hossein Sayyahzadeh
Keyword(s):  
Water Quality ◽  
Water Quality Index ◽  
Quality Index ◽  
Cold Water ◽  
Fish Farming ◽  
Water Fish

scholarly journals Doses and forms of Azospirillum brasilense inoculation on maize crop

2018 ◽  
Vol 22 (6) ◽  
pp. 373-377 ◽  
Author(s):  
José M. K. Santini ◽  
Salatiér Buzetti ◽  
Marcelo C. M. Teixeira Filho ◽  
Fernando S. Galindo ◽  
Daniel N. Coaguila ◽  
...  
Keyword(s):  
Azospirillum Brasilense ◽  
Low Cost ◽  
Leaf Tissue ◽  
Physical Characteristics ◽  
Maize Crop ◽  
Nutrient Contents ◽  
Randomized Design ◽  
Zn Content ◽  
Completely Randomized Design ◽  
The Impact

ABSTRACT In search of a more sustainable agriculture, the use of beneficial microorganisms has been highlighted, because they are low-cost and can reduce the use of fertilizers and increase grain yield. The present study aimed to evaluate the efficiency of A. brasilense inoculation and the best form and dose of inoculation in maize, measuring the impact on some physical characteristics and on its nutrition. The experiment was conducted in a greenhouse, in Ilha Solteira, SP, Brazil, in a completely randomized design, with four replicates and eight treatments: 1) control; 2) Seed 1x; 3) Seed 2x; 4) Soil 1x; 5) Soil 2x; 6) Leaf 1x; 7) Leaf 2x; 8) Seed 1x + Leaf 1x, respectively representing in each treatment the site and dose of application (1x, dose recommended by the manufacturer; 2x, twice the dose recommended by the manufacturer). No differences were found in any physical characteristics evaluated between treatments; however, for nutrient contents in the leaf tissue, there was effect on Zn content. It was concluded that, regardless of the presence of A. brasilense inoculation, forms or dose (in hybrid DKB 350), in general, there were no improvements in the characteristics evaluated.

scholarly journals The Effects of Endophytic Beauveria bassiana Inoculation on Infestation Level of Planococcus ficus, Growth and Volatile Constituents of Potted Greenhouse Grapevine (Vitis vinifera L.)

Toxins ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 72 ◽  
Author(s):  
Siphokazi Moloinyane ◽  
Felix Nchu
Keyword(s):  
Beauveria Bassiana ◽  
Insect Pests ◽  
Growth Parameters ◽  
Leaf Tissue ◽  
Gas Chromatography Mass Spectrometry ◽  
Vitis Vinifera L ◽  
Infestation Level ◽  
Volatile Constituents ◽  
Nutrient Contents ◽  
Significant Difference

Endophytic entomopathogenic fungi are being explored for the management of phytophagous insect pests. The effects of Beauveria bassiana (Hypocreales) inoculation of grape plants on the infestation level of P. ficus, tissue nutrient contents, and growth and volatile constituents of potted grape plants were assessed. Grapevine plants were individually inoculated with a suspension of 1 × 108 conidia mL−1 of B. bassiana by drenching before experimentally infesting each of them with thirty adult females of P. ficus. At four weeks post-treatment, the fungus was re-isolated from leaves of 50% of the fungus-exposed plants. However, no significant difference (p > 0.05) was observed in all the plant growth parameters measured in the fungus-treated and control plants. Plant tissue analysis revealed markedly higher contents of calcium (Ca) and magnesium (Mg) in the leaf tissue of plants exposed to the B. bassiana relative to the control. Gas chromatography mass spectrometry (GC-MS) analyses showed that a significantly (X2 = 5.1; p < 0.02) higher number of known anti-insect volatile compounds (nine) were present among fungus treated plants compared to the control plants (five). Naphthalene, which is toxic to insects and humans, was detected only in the volatiles of the fungus-exposed plants. B. bassiana did not have any significant effect on total polyphenol, alkaloid, and flavonoids. Overall, treatment with fungus did not inhibit the infestation by P. ficus. In conclusion, these findings shed light on some of the mechanisms involved in endophytic fungus-plant-insect interactions.

Source - sink differences in genotypes and water regimes influencing sucrose accumulation in sugarcane stalks

2009 ◽  
Vol 60 (4) ◽  
pp. 316 ◽  
Author(s):  
N. G. Inman-Bamber ◽  
G. D. Bonnett ◽  
M. F. Spillman ◽  
M. L. Hewitt ◽  
Jingsheng Xu
Keyword(s):  
Dry Matter ◽  
Supply And Demand ◽  
Leaf Tissue ◽  
Biomass Accumulation ◽  
Net Photosynthesis ◽  
Extension Rate ◽  
Sucrose Content ◽  
Dry Matter Partitioning ◽  
Physiological Basis ◽  
High Sucrose

Relatively little is known about the physiological basis for variation in sucrose content among sugarcane clones despite substantial research at the molecular and biochemical levels. We used irrigation and continuous monitoring of photosynthesis and plant extension rate to modify dry matter partitioning in four clones differing widely in sucrose content. Three pot experiments were conducted on two low sucrose content clones, KQ97-2599 and KQ97-2835, and two high sucrose content clones, Q117 and KQ97-5080, in a temperature-controlled glasshouse. As expected, sucrose content on a dry mass basis of whole stalks was greater in high (55% maximum) than in low sucrose clones (40% maximum), but sucrose content in the two clones selected for low sucrose reached 55% in some internodes. Differences between clones in whole-plant net photosynthesis and aerial biomass accumulation were small. However, biomass was distributed over fewer stalks in the high sucrose clones (4–7 stalks per pot) than in the low sucrose clones (9–11 stalks per pot). The high sucrose clones also allocated a considerably greater proportion of dry matter to the stalk (70% maximum) than the low sucrose clones (60% maximum). It is suggested that the relatively large amount of new leaf tissue produced by the high tillering, low sucrose clones placed an additional demand for structural photo-assimilate in these clones and delayed the accumulation of sucrose in the stalk. The results indicated that there is little direct genetic control on the maximum amount of sucrose that can accumulate in stalk tissue and that genetic contrasts in sucrose content reside more in the morphology of the plant and responses to ripening stimuli such as mild water stress, and how these traits influence supply and demand for photo-assimilate.

scholarly journals Optimum Feeding Nutrient Solution Concentration for Greenhouse Potted Miniature Rose Production in a Recirculating Subirrigation System

HortScience ◽  
2010 ◽  
Vol 45 (9) ◽  
pp. 1378-1383 ◽  
Author(s):  
Youbin Zheng ◽  
Diane Feliciano Cayanan ◽  
Mike Dixon
Keyword(s):  
Chlorophyll Content ◽  
Nutrient Solution ◽  
Growth Parameters ◽  
Dry Weight ◽  
Bottom Layer ◽  
Solution Concentration ◽  
Branch Number ◽  
Nutrient Contents ◽  
Fourfold Increase ◽  
Total Dry Weight

To determine the optimum feeding nutrient solution concentrations for the production of potted miniature roses (Rosa chineersis minima ‘Fall Festival’) under recirculating subirrigation conditions, plants were grown under four different nutrient solution concentrations [25%, 50%, 75%, and 100% of the full strength with an electrical conductivity (EC) of 1.756 dS·m−1]. Nutrient solution concentrations affected the stem, root, and plant total dry weight and flower and branch number. Under the 75% strength nutrient solution, these growth parameters were equal to or better than the 100% strength solution. No difference was detected in the chlorophyll content of leaves from plants that received the 50%, 75%, and 100% strength solutions during the experiment but at Day 35; only the 25% treatment had significantly lower leaf chlorophyll content than the other treatments. There were no treatment effects on the measured total foliar nutrient contents [except potassium (K)] of plants under the 75% strength solution compared with those under the 100% treatment, but nitrogen (N), phosphorus (P), and/or iron (Fe) of plants under the 25% strength solutions were below that of the acceptable range. Interveinal chlorosis and/or reddish leaves and branches were also apparent in plants under the 25% and 50% strength solutions. It is suspected that these are symptoms of N, P, and Fe deficiencies caused by the reduced nutrient solution concentrations and increased pH of the growing substrate. There were significant depletions of N and P nutrients in the 25% and 50% strength solutions at the end of the experiment, which was consistent with visual symptoms and deficiencies. Nutrient salts accumulated in the top section of the growing substrate under all treatments, but no phytotoxic effects were observed. The EC values for the top third of the growing substrate were much higher than those of the bottom two-thirds. EC for the top layer of the 100% treatment exhibited a fourfold increase compared with the bottom layer of that treatment. The NO3–, K, magnesium, and calcium for the top layer of the 100% treatment were 235%, 149%, 287%, and 245%, respectively, higher compared with the bottom layer of the 100% treatment. It was concluded that the nutrient solution concentrations typically used for potted miniature rose production in most of the Canadian greenhouses under recirculating subirrigation conditions can be safely reduced to 75% and produce better plants.

scholarly journals Effect of Fermentation on the Nutrient and Anti-nutrient Contents of African Bush Mango (Irvingia gabonensis) Seeds

2019 ◽  
pp. 1-14
Author(s):  
Ayeni Oluwanifemi Helen ◽  
Ojokoh Anthony Okhonlaye
Keyword(s):  
Micrococcus Luteus ◽  
Titratable Acidity ◽  
Nutrient Content ◽  
Nutrient Contents ◽  
University Of Technology ◽  
Bush Mango ◽  
Microbial Analysis ◽  
Irvingia Gabonensis ◽  
Ondo State ◽  
Carbohydrate Contents

Aim: Effect of fermentation on nutrient and anti-nutrient contents of defatted and un-defatted African bush mango seeds. Study Design: Ground African bush mango seeds used in this study were divided into two portions; A, and B. Portion A was defatted while portion B was not defatted; both portions were fermented. Place and Duration of Study: Department of Microbiology and Chemistry Department, Federal University of Technology Akure, Ondo State between November 2017 and July 2018. Methodology: Microbial analysis was carried out using pour plate technique. The temperature, pH and total titratable acidity were monitored throughout the fermenting period. Proximate, mineral and anti-nutrient contents of the samples were carried out using standard methods. Results: Seventeen microorganisms comprising 11 bacteria and 6 molds were isolated and identified as; Staphylococcus aureus, Bacillus subtilis, B. cereus, S. epidermis, B. licheniformis, Micrococcus luteus, Proteus vulgaris, Enterococcus faecalis, Lactobacillus fermentum, L. plantarum, L. brevis, Aspergillus clavatus, A. flavus, A. niger, Rhizopus stolonifer, Penicillium chrysogenum and A. fumigatus. The pH and TTA values reduced and increased respectively while the temperature varied significantly as the fermentation day increases. The non-defatted fermented sample showed increase in protein (10.34-12.09%), moisture (6.98-7.84%) and carbohydrate contents (24.98-29.20%); while there was a reduction in the ash (3.91-2.93%), fibre (1.55-1.30%) and fat (52.24-46.64%) contents. The defatted fermented sample showed an increase in the protein content (17.39-26.44%) while there was a reduction in the moisture (26.60-26.46%), carbohydrate (41.02-38.96%) ash (4.07-3.01%), fat (9.44-4.02%) and fibre contents (1.48-1.11%). The mineral composition of the fermented samples increased significantly when compared to the raw samples. The anti-nutrient content of the samples decreased significantly with fermentation. Conclusion: This study revealed that African bush mango seeds can be defatted and fermented to produce food of enhanced nutritional value.

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