ISSN / EISSN : 21769079 / 21775133
Current Publisher: ABAS Associação Brasileira de Águas Subterrâneas (10.14295)
Total articles ≅ 326
Latest articles in this journal
Comunicata Scientiae, Volume 11; doi:10.14295/cs.v11i0.3328
Zucchini (Curcubita pepo L.), known in Brazil as “abóbora de moita”, belongs to the Cucurbitaceae family and is among the top ten vegetables produced and of highest economic value in Brazil. The present study aims to evaluate the efficiency of different forms of pollination in zucchini plantations subject to boron fertilization. The experimental design used was randomized blocks in a 4 x 2 factorial arrangement, with four replications. The treatments consisted of a combination of four pollination methods (fruiting induced with 2,4-dichlorophenoxyacetic acid (2,4-D); manual pollination; natural pollination by bees and control) and boron fertilization (absent and in the soil at a dose of 2 kg ha-1). The percentage of flowering was evaluated and, of the harvested squashes, the diameter, length and average weight of the commercial fruits (those uniform in terms of shape, size, and color) were recorded. The application of 2,4-D promoted the greatest fruit setting rate, diameter, length and mass in the squash. 2,4-D promoted the development of parthenocarpic fruits and can be used to promote yield gains in zucchini production.
Comunicata Scientiae, Volume 11; doi:10.14295/cs.v11i0.3045
For a good development and a consequently high production, the bell pepper requires, among other conditions, satisfactory levels of soil fertility. In this perspective, this work aimed to evaluate the parameters of production and productivity of the bell pepper cultivar ‘Casca Dura Ikeda’ cultivated in field conditions, with different doses of buriti stem, in Bom Jesus, Piauí. The experiment was conducted at the Horticulture Department of the Campus Professora Cinobelina Elvas of the Federal University of Piauí (CPCE/UFPI). The experimental design was in randomized blocks with treatments distributed in plots referring to organic fertilization. There were five (5) doses of buriti stem (0, 10, 20, 30, and 40 t ha-1) plus an additional treatment (bovine manure and NPK mineral fertilizer), with four replications and an experimental unit consisting of twenty plants. The following variables were analyzed: number of fruits per plant, mean fruit length, basal diameter, mean thickness of the fruit pulp, mean fruit weight, production, and yield. We concluded that the yield attributes of the bell pepper cv. ‘Casca Dura Ikeda’ are influenced by organic fertilization, and production is increased by the buriti stem doses of 20 t ha-1 and 30 t ha-1 and by the use of the combination of manure and mineral fertilizer.
Comunicata Scientiae, Volume 11; doi:10.14295/cs.v11i0.3324
Basil (Ocimum basilicum L.) plants have multiple uses, ranging from spice to cosmetic purpose, besides being a source of essential oil and aromatic. These plants were commonly propagated by seed, however, few agrotechnologies are used to enhance the seed germination and initial growth in this crop. For this reason, our research aimed to evaluate aspects of seed germination of Ocimum basilicum L. cv. Limoncino, subjected to different bioregulators applied via substrate imbibition. The experiment was carried out in completely randomized design, with four treatments, as follows: T1: control (distilled water), T2: T13 a solution of a product formulated based on indolbutyric acid + naphthalene acetic acid + gibberellic acid (0.2 mL L-1, Liko Química), T3: gibberellic acid (0.5 mM L-1, progibb-400®) and T4: brassinosteroids (0.1 mM L-1). We evaluated: germination rate, germination speed index (GSI), first count, root and shoot length and chlorophyll a, b, total and carotenoids. The bioregulators did not influence germination, first count, GSI and photosynthetic leaf pigment, but application of gibberellic acid and brassinosteroids improve the shoot and root length, respectively. The gibberellic acid and brassinosteroids are promising bioregulators for stimulating initial basil growth.
Comunicata Scientiae, Volume 11; doi:10.14295/cs.v11i0.3266
O comportamento agronômico da videira ‘Marselan’, indicada para a produção de vinhos finos de qualidade, está relacionado ao manejo do vinhedo e às condições edafoclimáticas da região de cultivo. O objetivo do trabalho foi avaliar o comportamento vegetativo, produtivo e qualitativo de videiras da cultivar ‘Marselan’ submetidas ao sistema de poda em Cordão Esporonado duplo e a poda Guyot duplo, cultivadas em município pertencente a Serra do Sudeste, RS. As videiras ‘Marselan’ foram conduzidas em espaldeira sobre porta-enxerto ‘Paulsen 1103’, em um vinhedo comercial, em Encruzilhada do Sul, RS, Brasil. Durante os ciclos de produção de 2016/2017 e 2017/2018 foram avaliados o vigor vegetativo, massa de ramos podados, Índice de Ravaz, produção e composição físico química do mosto. O sistema de poda Guyot duplo nas videiras ‘Marselan’ induziu menor vigor das plantas, promoveu aumento do número de cachos por planta, da massa dos cachos, da produção e da produtividade. O tipo de poda interfere no vigor e na produtividade das uvas ‘Marselan’ sem alterar a qualidade do mosto. No manejo da cv. ‘Marselan’ na Serra do Sudeste no Sul do Brasil o sistema de poda Guyot é o mais indicado.
Comunicata Scientiae, Volume 11; doi:10.14295/cs.v11i0.3106
Chickpea cultivation in Brazil has not yet been consolidated, and studies aiming at the adequate nutritional management for this crop are necessary. This work aimed to evaluate the production of chickpea plants (cultivar BRS Aleppo) subjected to fertilization with zinc and P doses. The experimental was completely randomized, with four replications, in a 3 x 5 factorial scheme, corresponding to three fertilization treatments with Zn (without Zn addition; 50% of Zn applied at sowing, via soil + 50% applied at flowering, via leaves; and 100% applied at sowing, via soil) and five doses of phosphorus (0, 60, 120, 180, and 240 kg ha-1 of P2O5). The 100-grain mass (M100), pod mass (MV), number of pods (NV), number of grains (NG), total grain mass (MGT), yield (PROD), dry matter of the shoot part (MSPA) and plant residues (MSRV), and agronomic efficiency (EA) were characterized. There was an isolated effect of the P doses on the M100, MGT, PROD, MSPA, and MSRV characteristics. The application of 240 kg ha-1 resulted in an increase in the production components and a maximum yield of 3,018 kg ha-1, indicating the need to adopt higher doses of P2O5 to increase chickpea production in tropical soils. However, the highest agronomic efficiency was obtained after the application of 60 kg ha-1 of P2O5, along with Zn at sowing.
Comunicata Scientiae, Volume 11; doi:10.14295/cs.v11i0.3221
The association between mineral fertilizer and biofertilizers can contribute to guavas quality. An experiment was carried out in order to assess, over the days, 'Paluma' guavas physical-chemical quality in function of nitrogen fertilizer and biofertilizer doses. It was adopted a randomized blocks with treatments distributed in a factorial 5 x 2 x 5 referring to evaluation days post-harvest (0, 3, 6, 9 and 12), nitrogen fertilization (50 and 100% culture recommendation) and application of bovine biofertilizer doses by fertigation (0.0, 2.5, 5.0, 7.5 and 10.0%). The physical-chemical quality of 'Paluma' guava fruit was influenced by the association between liquid bovine biofertilizer and nitrogen fertilization. This combination increased soluble solids, titratable acidity, ratio, vitamin C, pH, firmness and loss of fresh mass, but did not affect the pulp percentage. The bovine biofertilizer, together with mineral fertilization, is important to increase the post-harvest quality of 'Paluma' guava.
Comunicata Scientiae, Volume 11; doi:10.14295/cs.v11i0.3277
Bushy cashew (Anacardium humile A. St. Hill) is an endemic plant species to the Brazilian Cerrado, a region characterized by scarce and poorly distributed rainfall. The use of hydrogel, a water-retaining polymer that features massive water storage and promotes its release into the environment throughout time may be an alternative to reduce the frequency irrigation in the production of bushy cashew seedlings. This study aimed to evaluate the quality and early growth of bushy cashew seedlings as a function of hydrogel doses. The experimental design adopted was in five randomized blocks, with five hydrogel doses (0; 1,0; 2,0; 3,0; and 4,0 g L-1 of soil), and each plot consisting of 10 seedlings, totaling 250 plants. A Yellow Latosol with sandy-loam texture was used for seedling production. The growth evaluation was performed through the variables of emergence speed index, germination percentage, height, diameter, root volume, number of leaves, shoot dry mass, root dry mass, and the Dickson quality index. The results revealed a positive influence of the hydrogel on the growth and quality of bushy cashew seedlings, notably at the dose of 4 g L-1 of soil.
Comunicata Scientiae, Volume 11; doi:10.14295/cs.v11i0.3115
Water scarcity in the world is a problem diagnosed especially in countries with large semi-arid regions such as Brazil. Research has been conducted with a view to making use of saline waters as an input for cultivation, particularly in hydroponics, with especial focus on lettuce, the most prominent leafy vegetable in Brazil. The objective of this study was to evaluate the development of lettuce in a semi-hydroponic system fertigated with saline water and under foliar fertilization with biofertilizer. The present study was carried out in a greenhouse located in the experimental area of the Department of Environmental and Technological Sciences (DCAT) of the Federal Rural University of the Semi-Arid Region, in the municipality of Mossoró, RN, Brazil. The experimental design was a randomized complete block design, with treatments arranged in a 2 x 4 factorial scheme, with 4 replicates, two salinity levels of the water used to prepare the nutrient solution (0.5 and 3.5 dS m-1) and four biofertilizer concentrations (0, 20, 40 and 60%) applied by foliar spraying. The evaluated characteristics were: shoot diameter, stem diameter, number of leaves, fresh mass, dry mass, leaf succulence, leaf area and specific leaf area. The use of saline water to prepare the nutrient solution reduces fresh mass and dry mass production in the lettuce crop. The biofertilizer can be applied through the leaves at concentration of up to 20%, promoting greater plant growth.
Comunicata Scientiae, Volume 11; doi:10.14295/cs.v11i0.3126
Pomegranate is a fruit rich in vitamins and secondary metabolites used in traditional medicine and industry. However, production losses have been associated the anthracnose, disease caused by Colletotrichum species. This is an important disease of the pomegranate, as it affects the yield and the quality of the fruits. The present study aimed to investigate which species of Colletotrichum are associated with anthracnose disease in pomegranate in the Northeast region of Brazil, using multi-locus phylogenetic analysis and morpho-cultural characteristics. The total DNA extracted was amplified with GAPDH, TUB2, CAL, ACT genes and the ITS-rDNA region. The sequences obtained were used for the construction of phylogenetic trees of Bayesian inference. The mycelial growth rate, size and shape of the conidia and appressories were evaluated for the morpho-cultural characterization of the species. Six isolates were analysis and three species belonging to the C. gloeosporioides complex were identified in this study. This is the first report of C. theobromicola (2) in pomegranate fruit in Brazil and C. siamense (2) and C. fructicola (2) in the world.
Comunicata Scientiae, Volume 11; doi:10.14295/cs.v11i0.3200
The objective of this work was to determine the macronutrient doses that allow the highest phytomass yield and growth of basil plants. The experiment was carried out in the experimental area of the Federal University of Recôncavo da Bahia, in Cruz das Almas, BA, in a greenhouse. The treatments were obtained according to the Baconian matrix statistical arrangement, in which one of the nutrients is supplied in variable amounts, while the others are kept at a referential level. Six nutrients (nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg) and sulfur (S)) were evaluated in three different doses, and two additional treatments, one with reference doses and another without nutrient addition, totaling 20 treatments that were arranged in a completely randomized design with five replications, totaling 100 experimental units. At 50 days after treatment distribution, the growth parameters were evaluated: Plant height, number of leaves, leaf dry mass, stem, root and leaf area. It was observed that the highest leaf dry mass accumulation was estimated with the dose of 250 mg dm³ of N giving an average of 8.01g per plant, being significantly higher when compared to all other tested elements, this parameter is extremely relevant because the leaves are characterized as the main product of this species. Phosphorus doses allowed significant results in height and leaf area, whereas K favored higher leaf emission. Positive responses were verified for nutrients Ca, Mg and S in all parameters tested at levels above those tested as reference.