Open Access Original Research Article

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

Dalva Paulus, Ezequiel Toffoli, Celso Eduardo Pereira Ramos, Claúdia de Andrade Moura, Dislaine Becker, Iara Emanoely Francio

Journal of Experimental Agriculture International, Page 1-11
DOI: 10.9734/jeai/2019/v36i230229

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.

Open Access Original Research Article

Effect of Seed Treatments and Containers on Chilli Seed Viability

Sunil Kumar, S. S. Jakhar

Journal of Experimental Agriculture International, Page 1-10
DOI: 10.9734/jeai/2019/v36i230230

An experiment was conducted to investigate the influence of fungicides and packaging materials on longevity of chilli seed (variety: RCH-1). The seeds were treated with 15 fungicides and were kept in three containers viz. Metal box, Cloth bag and Plastic zipling bag up to 12 months under ambient conditions in seed pathology laboratory of Department of Seed Science & Technology, CCSHAU, Hisar, India. The samples were drawn at quaterly intervals for ascertaining the seed quality parameters. The seeds treated with flusilazole (2 g kg-1 seed) and stored in metal-box were found better for maintenance of higher seed quality parameters [germination, root length, shoot length, mean seedling dry weight, vigour indices] during the study period. The study suggested that use of appropriate packaging material and seed treatment could be useful to prolong the storage life of chilli seeds.

Open Access Original Research Article

Effect of Mechanical Damages and Storage Conditions on Quality of Markies cv. Potatoes for Processing

Dreice Nascimento Gonçalves, Luciana Gomes Soares, Ariana Mota Pereira, Paula Acácia Silva Ramos, Maria Eduarda da Silva Guimarães, Fernando Luiz Finger

Journal of Experimental Agriculture International, Page 1-5
DOI: 10.9734/jeai/2019/v36i230231

Aims: Evaluate whether mechanical damage and storage conditions affect the quality of the ‘Markies’ potato for processing.

Study Design: The experimental design was the completely randomized, in the scheme of split-plots. The plots were composed of treatments with and without mechanical damage and the subplots were made up by the evaluation times, with 5 replicates, where the experimental unit was composed of 2 tubers.

Place and Duration of Study: Tubers of the ‘Markies’ cultivar from the producing region of Perdizes, State of Minas Gerais, were planted in June 2016 and harvested in October 2016.

Methodology: The tubers were stored for 2 months at 8°C, and further divided into treatment with damage, in which the tubers were subjected to impact and abrasion; and control treatment, in which the tubers were not damaged. After that, they were stored at 28°C and evaluated for their loss of loss of accumulated fresh mass (FML), total soluble sugar (TSS), reducing sugar (RS), non-reducing sugar (NRS) and color after frying in the periods of 0, 12, 24, 36 and 48 h after being placed at room temperature.

Results: The mechanical damage in the tubers increased FML, however, it did not affect the content of TSS, NRS, RS and color after frying. Increases were observed in the content of TSS and NRS after 12 h of evaluation. Grade 2 was assigned to the coloring scale after frying for the tubers regardless of treatment or evaluation period.

Conclusion: Mechanical damage increases the FML and the ‘Markies’ cultivar is suitable for the industry of pre-fried potato processing even under the occurrence of mechanical damage and exposure to high temperatures.

Open Access Original Research Article

Structural Characterization of Mint (Mentha x villosa Huds) Stem and Leaf

Ana Carolina Bezerra, Luana da Silva Barbosa, José Flávio Cardoso Zuza, Agda Malany Forte de Oliveira, Camila Firmino de Azevedo

Journal of Experimental Agriculture International, Page 1-6
DOI: 10.9734/jeai/2019/v36i230232

Aims: The objective of this study was to identify the structural characteristics of the shoots of Mentha x villosa Huds and also, identify the main structures responsible for the production of active principles.

Methodology: The analyzes were performed with stems and leaves from adult and healthy plants, which presented a uniform morphological pattern. The materials selected for the anatomical analyzes were fixed in FAA for 24 hours and after this period conditioned in 70% alcohol. Cross-sections and paradermic sections were manually made with a cutting blade. For sections analysis, 1% sodium hypochlorite was used for discoloration and safranine 10% dye for tissue staining.

Results: The leaf of Mentha x villosa Huds presents asymmetric mesophyll, formed by palisade and lacunar parenchyma, and uniseriate epidermis. The diacytic stomata are located on the abaxial surface of the leaves with different sizes, all having a substomatal chamber. On both sides of leaves, glandular trichomes were observed in great quantity. The leaf midrib is formed by a large vascular bundle, with xylem facing the adaxial surface and phloem facing the abaxial surface. The stem presents uniseriate epidermis and below it can be found one or two layers of colenchyma. The vascular bundle consists of four main xylem points, and externally to it is found the phloem, which gives the quadrangular shape to the stem. Mentha x villosa Huds has characteristics that are common to aromatic species of the Lamiaceae family, which makes its characterization and differentiation difficult, as for example, its secretory structures which do not have taxonomic importance for differentiation on this species, since they are similar in other species of the same family.

Conclusion: However, Mentha x villosa has a larger number of cell layers in the lacunar parenchyma, which is an important characteristic for the differentiation of species.

Open Access Original Research Article

Effects of Pesticides on Vegetative Growth and Fruit Yield of Seedless Mandarin at the Basic Design Period in Thai Nguyen Province, Vietnam

Nguyen Minh Tuan, Ha Minh Tuan, Luan Thi Dep, Nguyen Ngoc Lan

Journal of Experimental Agriculture International, Page 1-6
DOI: 10.9734/jeai/2019/v36i230233

Aims: This study was carry out to evaluate the effects of pesticide on vegetative growth, fruit yield, fruit quality of sweet seedless Mandarin citrus seedless in basic design period at Thai Nguyen province

Study Design: The study was carried out in Dai Tu district, Thai Nguyen province in 2017-2018. The experiment included three treatments were designed in Randomized Complete Block Design with three replications.

Results and Discussion: The vegetative growth of tree and shoot, fruit character and fruit quality was collected. Results indicated that T2 treatment (Trebon 10 EC) had the best results in vegetative growth, fruit quality and fruit yield.

Conclusion: It was concluded that T2 treatment application has greatly enhanced vegetative growth, fruit character, and fruit quality of sweet seedless Mandarin under field conditions.