Open Access Short Research Article

Forage Performance of Corn Hybrids and Their Varieties

Moisés T. da Silva, Paulo V. Ferreira, Rosa C. Lira, Gilson M. Filho, João V. S. Neto, Douglas F. dos Santos, Nathanyel E. Alves, Amauri M. S. Filho, Jonathan T. Santos, José E. de Lira, Maria E. Santos Lira

Journal of Experimental Agriculture International, Page 1-8
DOI: 10.9734/jeai/2019/v33i130129

The present study had as objective to evaluate the performance of maize hybrids and yours varieties for forage production in the climate and soil conditions of the forest area in the state of Alagoas. In conducting the experiment it was adopted the randomized block design, with 12 treatments (maize genotypes) and three replicates, totaling 36 experimental plot. Each experimental plot consisted of four rows of 5 meters in length, two lateral queues were discarded due to the border effect. For planting, the spacing of 0,7 m x 0,143 m was used, totalizing a final stand of 100,000 plants per hectare after thinning. At 93 days after sowing, the evaluations were carried out regarding the plants biometrics, and forage yield. Considering the conditions under which the experiment was developed, it can be concluded that: (a) The genotypes Jabotão, Branca, Branquinha and their experimental hybrids showed the highest plant height; (b) The experimental hybrid Janor presented the best culm/ear; (c) The Jabra and Branquinha genotypes are the best performance for forage yield (d) The Jabra experimental hybrid showed excellent forage aptitude, which makes it a promising material, which can be evaluated in other regions in the future and later launched as a genotype for fodder production.

Open Access Original Research Article

Physiological Quality in Leucaena leucocephala Seeds Conditioned with Potassium Nitrate Submitted to Saline and Water Stresses

Jackson Araújo Silva, Iris Renata Freire Silva, Andréa Celina Ferreira Demartelaere, André Dantas de Medeiros, Marcio Dias Pereira

Journal of Experimental Agriculture International, Page 1-9
DOI: 10.9734/jeai/2019/v33i130132

Leucaena leucocephala is a species that occurs in semi-arid regions capable of developing physiological and biochemical strategies under adverse environmental situations, such as saline soils and water deficiency. Even so, there are still losses in germination and initial development of plants, mainly due to abiotic stress effects, making it necessary to implement alternatives which are able to diminish the impact on the seeds with the use of potassium nitrate. The objective of this work was to evaluate the physiological quality in L. leucocephala seeds conditioned in potassium nitrate solution and subjected to saline and water stresses. After scarification, the unconditioned leucine seeds were separated and identified, and the conditioners were immersed in the 1.0 Mmol/L solution of potassium nitrate for 24 hours. The treatments were NaCl: 0; 30; 60; 90; 120 and 150 Mmol/L and the water potential: 0, 0; -0.2; -0.4; -0.6, and -0.8 MPa. The seeds were distributed over two Germitest® sheets, moistened with distilled water 2.5 times the dry weight and incubated in a B.O.D. at 25°C for 10 days. Then, the germination speed index, seedling length and seedling mass were measured for the normal seedlings. Eleven treatments with four replicates of 50 seeds were used. The design was completely randomized, and the statistical analyzes were performed in SAS. The use of potassium nitrate (KNO3) contributed to maintaining the physiological quality of L. leucochephala seeds under conditions of saline stress and water restriction.

Open Access Original Research Article

Vitamin C, Antioxidant and Polyphenol Activity of Some Selected Potato Varieties as Influenced by Vermicompost

Jannatul Ferdous`, Tuhin Suvra Roy, Rajesh Chakraborty, Maruf Mostofa, Bimal Chandra Kundu, Hossain K. M. Delowar

Journal of Experimental Agriculture International, Page 1-9
DOI: 10.9734/jeai/2019/v33i130133

The application of vermicompost may improve the quality of potato. The present study revealed that vermicompost had a significant effect on most of the quality contributing parameters studied under the experiment. Results demonstrated that quality parameters increased with increasing vermicompost level. Among the sixteen treatments combination, BARI Alu-25 (Asterix) with vermicompost at the rate of 6 t/ha showed the highest ascorbic acid (Vitamin C), antioxidant and polyphenol content. In the case of ambient storage condition; ascorbic acid and polyphenol decreased with an increasing storing period while antioxidant content increased with the increasing storing period up to 60 days after storage (DAS). BARI Alu-25 (Asterix) and BARI Alu-29 (Courage) may store under ambient storage condition up to 60 DAS without imparting any significant quality losses just prior to the sprouting of the tuber. It may be concluded that the potato growers of Bangladesh may apply vermicompost on their field at the rate of 6 t/ha for maintaining the good quality of potato.

Open Access Original Research Article

Rooting of Herbaceous and Semihardwood Cuttings of Guava cv. Século XXI, under Varying Concentrations of Indolebutyric Acid

Jussara Cristina Firmino da Costa, Rejane Maria Nunes Mendonça, Gerciane Cabral da Silva, Silvanda de Melo Silva, Walter Esfrain Pereira, Carlos Eduardo Magalhães dos Santos

Journal of Experimental Agriculture International, Page 1-9
DOI: 10.9734/jeai/2019/v33i130135

In the commercial production of guava seedlings (Psidium guajava L.) the quality of the cuttings, homogeneity, high percentage of rooting are the factors important to be analyzed. Therefore, as the Século XXI cultivar is recent, it is necessary to do more studies regarding the behavior of this guava to the factors that aid in the rhizogenic process. The objective of this work was to verify the concentrations of indolebutyric acid (IBA) that provide the best rooting of cuttings herbaceous and semihardwood, as well as to verify the best kind of cuttings used for vegetative propagation the guava cuttings cultivar ‘Século XXI’. The experimental design was completely randomized in a 5 x 2 + 1 factorial design, beginning with five concentrations of IBA (0, 1000, 1500, 2000 and 2500 mg L-1), two kinds of cuttings (herbaceous and semihardwood) and one control treatment (immersed in distilled water for 12 hours), with four replications and 10 cuttings per plot. In relation of the variables: the percentage of cuttings live without roots, callus, number of roots and dry weight of shoots did not present significant interaction among treatments, not adjusting to any regression model. Therefore, concluding that the herbaceous cutting is the most indicated for the propagation of guava seedlings of ‘Século XXI’; The concentration of 2500 mg L-1 of IBA promotes a higher percentage of rooted semihardwood cuttings without leaf; The hormone solution diluted with alcohol 50% (v/v) resulted in toxicity for herbaceous and semihardwood cuttings cv. Século XXI.

Open Access Original Research Article

The Harvest Season Changes the Organoleptic Properties of Onion during Storage

Ariana Pereira Mota, Renata Ranielly Pedroza Cruz, Ana Paula Sato Ferreira, Mateus de Paula Gomes, Maria Eduarda da Silva Guimarães, Wellington Souto Ribeiro, Franciscleudo Bezerra da Costa, Fernando Luiz Finger

Journal of Experimental Agriculture International, Page 1-9
DOI: 10.9734/jeai/2019/v33i130136

Aims: The objective was to determine the influence of the onion harvest time "Baia Periforme" on post-harvest quality of the bulbs during storage.

Study Design: The experiment was conducted in a randomized block design with three treatments, six replicates with two bulbs each.

Place and Duration of Study: Departamento de Fitotecnia, Universidade Federal de Viçosa, between June 2017 and July 2018.

Methodology: Seedlings, 20 days old, were transplanted into 20 cm spacing between rows and 10 cm between plants. The bulbs were harvested 120 days after transplanting with manual tipping of the pseudo-stem (T1), with 50 (T2) or 75% (T3) of the bulbs popped. The soluble sugars (SS), non-reducing sugars (NRS), reducing sugars (RS), total soluble solids (TSS), titratable acidity of phenolic compounds and alinase activity was determined every 30 days for 90 days.

Results: The content of SS, TSS, phenolic compounds and alinase activity increased in the onions of T2, resulting in more sweet and pungent bulbs due to the higher content of acidity and phenolic compounds.

Conclusion: The post-harvest quality of onion bulbs "Baia Periforme" was maintained when they were harvested with 50% of bulbs popped.