Open Access Original Research Article

Post Harvest Quality of Acid Lime Fruits 'Tahiti' Grafted on Genotype (TSKCx (LCR x TR) – 017), under Saline Stress

Sabrina Vieira de Sousa, Franciscleudo Bezerra da Costa, Luderlândio de Andrade Silva, Marcos Eric Barbosa Brito, Ana Marinho do Nascimento, Jéssica Leite da Silva, Bruna Rocha da Silva, Kátia Gomes da Silva, Kalinne Passos dos Santos, Giuliana Naiara Barros Sales, Larissa de Sousa Sátiro, Sthelio Braga da Fonseca

Journal of Experimental Agriculture International, Page 1-10
DOI: 10.9734/jeai/2019/v31i630085

Objective: The objective of this study was to verify the post-harvest quality of fruits of the acid lime fruits ‘Tahiti’ of the genotype TSKC x (LCR x TR) – 017, under saline stress.

Experimental Design: The experimental design was completely randomized from the factorial arrangement (2x5), where factor 1 corresponded to irrigation water salinity levels (0.3 and 3.0 dSm-1) and factor 2, storage time (0.5, 10, 15 and 20 days).

Location and Duration of the Study: The experiment was conducted at the Center of Science and Technology Agrifood of the Federal University of Campina Grande, Pombal Campus, Paraíba, from February 2016 to February 2017.

Methodology: The effect of the treatments was analyzed from the following evaluations: loss of fresh weight (%),soluble solids(%),titratable acidity (%),soluble solids and titratable acidity, hydrogen potential, concentration of H + ions (μM), electrical conductivity (dSm-1),ascorbic acid (mg 100 mL-1), total soluble sugars (mg 100 mL-1),phenolic compounds(mg 100 mL-1) and flavonoids (mg 100 mL-1).

Results: It was observed the interaction between the saline concentration and the time of storage, on the physical-chemical and chemical characteristics in the acid file 'Tahiti'.

Conclusion: The salinity of 3.0 dSm-1 showed the highest values for soluble solids, SS/AT ratios, total soluble sugars, phenolic compounds, and flavonoids during storage, indicating that the quality of these fruits was better when compared to fruits of the acidic 'Tahiti' file with 0.3 dSm-1 of salinity.

Open Access Original Research Article

Botanical Analysis of Seed Bank in a Cultivated Area of Integration Livestock Agriculture

Luiz Carlos de Santana Jacintho, Jorge Luiz Xavier Lins Cunha, Jackson da Silva, Gerlan do Nascimento Rodrigues, Antônio Barbosa da Silva Júnior, Emerson Xavier Lins Cunha, Lucas Alceu Rodrigues de Lima, Márcio Lisboa dos Santos

Journal of Experimental Agriculture International, Page 1-12
DOI: 10.9734/jeai/2019/v31i630086

The seed bank has an ecological role of great importance in the re-composition of new individuals in plant communities. In the integration system livestock agriculture, the seed bank usually presents a serious problem, the agricultural activity, because this type of activity favors weed infestations over a long period of time. The different soil management systems and cultures have decisive influence on germination and composition of the flora of an area and in the seed bank of the agricultural soil. The objective of this study was to identify weed species that emerged during the analyzed period of the seed bank at different depths in an area of integration livestock agriculture. The present study was conducted in an area of integration livestock agriculture in the Center of Agrarian Sciences, of the Federal University of Alagoas (CECA - UFAL), located in the municipality of Rio Largo - AL, Brazil, in the year 2017. 20 samples at each depth: 0.0 to 10.0 cm and of 10.0 to 20.0 cm were collected. In possession of the data, it was possible to determine several phytosociological characteristics. It was observed in the composition of the seed bank high diversity of species with great variability. The seed bank has a greater diversity in the first soil layer (0.0 to 10.0 cm), presenting in its total density a decrease to increase the depth.

Open Access Original Research Article

Analysis of Morphometric Variables of River Espinharas Hydrographic Sub-basin Using Geographic Information System

Felipe Silva de Medeiros, Joedla Rodrigues de Lima, Roberta Patrícia de Sousa Silva, Sérvio Túlio Pereira Justino, Amanda de Lira Freitas, Angélica de Araújo Lima, Leonildo Victor Santos de Lima, José Lenildo Barbosa Leite da Silva, Anderlon Arrais de Morais Monte

Journal of Experimental Agriculture International, Page 1-18
DOI: 10.9734/jeai/2019/v31i630088

The relief forms, terrain differences, soil type and flora are the most important indicators for the description of a river basin or drainage network. The present work had as objectives, to perform the morphometric characterization of the hidrographic sub-basin (SBH) of the Espinharas river; analyze the intensity of land use; suggesting mitigating measures in areas with greater intensity of use, with the help of geospatial tools. The sub-basin of the Espinharas river, extends through thirty-one (31) municipalities, covering the states of Paraíba, Rio Grande do Norte and Pernambuco. For the analysis, images were used, from the Digital Elevation Model (DEM), Shuttle Radar Topographic Mission (SRTM), and Landsat 8 satellite images, resolution 30 m, bands 2, 3 and 4. Next, with QGIS software aid 2.18.17 generated the map of slope, mapping of intensity and land use, later calculations of the morphometric variables, and finally elaborated proposals of mitigating measures for the degradation of the sub-basin. The results of the morphometric parameters found for the Sub-basin indicate values of the Compass coefficient of 2.68 and Form factor 0.32, indicating that the sub-basin presents an irregular shape that differs from the figure of a circle, approaching an elongated shape, and thus not conducive to flooding. In relation to the intensity of use, the areas with low intensity class of use have the largest representation in this basin, covering an area of 2,147.98 km² (65.27%). The Espinharas river sub-basin presents several nonconformities of environmental impacts generated mainly by bad planning of use of the area and disrespect to the legislation. In this case, it is necessary for research to support effective public policies that favor less impacting agricultural practices, allowing farmers to provide their livelihoods at the same time, allowing future generations to survive in the semi-arid.

Open Access Original Research Article

Effect of Nova Aminochelated-zinc on Growth and Yield of Rice (Oryza Sativa L.)

P. Venkata Narayana, Y. Sambasiva Rao, A. Kiran Kumar, Y. Sreekanth, N. Basanth

Journal of Experimental Agriculture International, Page 1-6
DOI: 10.9734/jeai/2019/v31i630089

A field experiment was conducted during the kharif, 2018 to study the effect of Nova Aminochelated-Zinc on growth, yield and yield components of rice. The experiment was laid out in Randomized Block Design with six treatments T1: Control, T2: Recommended Dose of Fertilizers (RDF) without Zinc, T3: T2+5 ml l-1 Nova Ami-Zinc @TI and PI, T4:T2+2.5 gm l-1 ZnSO4 @TI and PI, T5: 5 ml l-1 Nova Ami-Zinc @TI and PI, T6: 2.5 gm l-1 ZnSO4 @TI and PI. Experiment revealed that application of RDF+5ml l-1 Nova Ami-Zinc @ TI and PI (T3) resulted in maximum Number of tillers m-2, Total number of Grains Panicle-1, Number of Filled Grains Panicle-1, Test weight and Grain Yield but application of RDF+2.5 gm l-1 ZnSO4 @TI and PI showed maximum height followed by application of RDF +5 ml l-1 Nova Ami-Zinc @ TI and PI.

Open Access Original Research Article

Optimum Size and Shape of Experimental Units for Cassava Cropping

Janilson Pinheiro de Assis, Roberto Pequeno de Sousa, Walter Martins Rodrigues, Paulo César Ferreira Linhares, Eudes de Almeida Cardoso, Maria Francisca Soares Pereira, José Aluisio de Araújo Paula, Ariana da Mota Oliveira

Journal of Experimental Agriculture International, Page 1-10
DOI: 10.9734/jeai/2019/v31i630090

In agricultural experimentation, the right size and shape of experimental units increase the precision of the experiment. This study determines the optimum size and shape of the experimental unit for field experimentation with cassava. For this, we carried out a uniformity test in Pacajús, Ceará, under dry conditions, with the cultivar 'Mastruço' planted at a spacing of 1.00 m x 0.60 m. The root yields were collected in 15 rows with 40 plants each, comprising 31 types of experimental units of 23 different pre-established sizes. The optimum size of the experimental unit was estimated by the Hatheway method, and the shape was determined by the relative information method. The Hatheway method indicated several optimum sizes of experimental units, many of which were applicable for evaluation experiments of cassava cultivars. The 15 x 1 rectangular experimental unit (15 rows with one plant and 9.00 m² of useful area) was considered the ideal shape for assessment of cassava production, which was smaller than the size suggested in surveys with of cassava cropping. There was a continuous nonlinear reduction of the coefficient of variation with the increase in plot size.