Open Access Original Research Article

Yield Response Factor to Water (Ky) of FMX 993, FMT 701 and FMX 910 Cotton Varieties in Campo Verde, MT

Patrícia Monique Crivelari Costa, Aloisio Bianchini, José Holanda Campelo Júnior, Sharmely Hilares Vargas, Marcelo Ferri, Hipólito Murga Orrillo

Journal of Experimental Agriculture International, Page 1-8
DOI: 10.9734/jeai/2019/v39i430337

Production of herbaceous cotton in rainfed is subject to water-deficit risks due to climatic variations, such as precipitation with non-homogeneous spatial-temporal distribution. In this sense, the objective of this study was to evaluate the yield response factor to water of FMX 993, FMT 701 and FMX 910 cotton varieties, in Campo Verde County, Mato Grosso State, Brazil. Real yield data of the 2009/10 and 2010/11 seasons of the three varieties were obtained. Meteorological data were used to estimate the maximum yield and to calculate the daily water balance for each variety and seasons. From these values the yield response factor to water (Ky) was obtained. Ky values ranged from 0 to 0.9, with the lowest and highest values for FMX 910 for the 2009/10 and 2010/11 seasons, respectively. These values obtained from Ky indicate that all varieties studied present increasing tolerance to water-deficit. The FMX 993 variety had a lower variation in Ky values between 0.3 and 0.5 for the 2009/10 and 2010/11 seasons, in that order. Therefore, among the cotton varieties evaluated in this study, recommend FMX 993 for the conditions of Campo Verde County, Mato Grosso State, due to its greater tolerance to the water-deficit.

Open Access Original Research Article

Evaluation of Maize Varieties for Grain Yield under Water-restricted Conditions

Rafael Nunes de Almeida, Fernanda Vargas Valadares, Larícia Olária Emerick Silva, José Dias de Souza Neto, Diego Rogério Ferraz, Julio Cesar Fiorio Vettorazzi, Ana Paula Cândido Gabriel Berilli, Monique Moreira Moulin

Journal of Experimental Agriculture International, Page 1-13
DOI: 10.9734/jeai/2019/v39i430338

The study sought to evaluate maize germplasm accessions from the Ifes Germplasm Bank (Ifes BAG) to identify promising lines for breeding programs to increase yield under water-restricted conditions. A competition trial was carried in two contrasting environments in the state of Espírito Santo, Brazil: municipality of Alegre and municipality of Colatina. Twenty-one maize accessions were collected and evaluated for agronomic performance in two locations (The municipalities of Alegre and Colatina) in Espírito Santo State, Brazil. Trials were conducted under water-restricted conditions from vegetative to reproductive stage in a randomized block design with five replicates. Data were subjected to analysis of variance by the F Test and to multivariate clustering analysis according to the estimate of genetic distance proposed by Mahalanobis. Genotype by environment interaction identified promising genotypes for each specific environment. Maize germplasm accessions from the Ifes BAG showed genetic variability. Among the germplasm accessions from the Ifes BAG, the populations Padrinho, Piranão 14, Aliança and Palha Roxa are promising for breeding programs with the goal of increasing grain yield under water-restricted conditions in tropical climate regions.

Open Access Original Research Article

Phosphate Fertilization in Amaranth Culture cv. BRS Alegria in Second Harvest in the Cerrado

Fábio Kempim Pittelkow, Aloisio Bianchini, Pedro Silvério Xavier Pereira, Luana Maria de Rossi Belufi, Maria das Graças de Assis Bianchini, Rodrigo Pengo Rosa

Journal of Experimental Agriculture International, Page 1-9
DOI: 10.9734/jeai/2019/v39i430339

Vegetable species, capable of diversifying production in the second crop of the Cerrado, producing grains rich in protein and providing dry matter for off-season, are most welcome. The amaranth presents these characteristics, however its cultivation is little known in Brazil. The adequate availability of nutrients for this plant, under cerrado conditions, has not yet been defined and these soils, in turn, are of low natural fertility, deficient, mainly, in phosphorus. Before this senary, the present work was developed with the objective of evaluating agronomic and productive aspects of amaranth cv. BRS Alegria, cultivated in succession to soybean, underwent increasing doses of phosphorus. The experimental design was a randomized complete block design with five levels of phosphorus (0, 30, 60, 100 and 150 kg.ha-1 of phosphorus - triple superphosphate) applied in the sowing furrow, with four replications. Plant height was evaluated; stem diameter; panicle length; final population of plants; phosphorus content in leaf tissue; mass of dry matter of panicle, stem, leaf and total and; grain yield. The model with higher R2 in the regression analysis was selected to express the behavior of the phosphorus doses on the evaluated characteristics. The phosphorus applied in the sowing furrow increases productivity and phosphorus content in the amaranth foliar tissue in succession to the soybean crop. The highest estimated productivity of amaranth grains was obtained with 98.7 kg ha-1 of P2O5, with values close to the level of economic response to the application of the input.

Open Access Original Research Article

Extractivism of the Umbuzeiro in the Perception of the Farmers of the Community Riacho da Serra, in São Jose do Sabugi-PB

André Japiassu, Jacob Silva Souto, Francisco de Assis Pereira Leonardo, Patrícia Carneiro Souto, Francisco de Oliveira Mesquita, Vagner de Almeida Melo

Journal of Experimental Agriculture International, Page 1-11
DOI: 10.9734/jeai/2019/v39i430340

The present work aims to diagnose the perception of the farmers of the community of Community Riacho da Serra, in São José do Sabugi-PB, regarding the degree of education, education, salary range and employment and income generation with the culture of Umbu. Initially visits were made in the community with the intention of exposing the idea and performing. The research was conducted during the period from march/2016 to may/2016. We applied structured questionnaires, previously made with the objective of involving and extracting the maximum information from the whole community. With the data in hand, figures were produced that demonstrate the perception of the cooperative farmers about the extraction of umbu, for example, incomplete first grade (47%), followed by complete high school (40%) which cultivate umbu as family income. As regards the process of extraction of umbu by Community producers, a number of uses may be indicated, with the main destinations being the pulp industry (34%), household consumption (33%), food for animals (19%) and direct sales (14%). Regarding marketing, when the sale was made, the bag price of 3.0 kg ranged between R $ 2.00 and R $ 2.50, and 62% of the producers consulted stated that they sell for a price of R $ 2.00, while 31% sell at R$ 2.50 and 7% at R$ 2.50. Of the producers that produce one hectare, 100% have another activity to supplement the income, among which: rice (85%), livestock (85%), handicrafts (7.5%) and others (7.5%).

Open Access Original Research Article

Spatial - Temporal Analysis of the Use and Land Cover in the Rio da Cruz Micro Basin of the Semi-arid Region of Paraíba, Using Remote Sensing

Denize Monteiro dos Anjos, Ivonete Alves Bakke, Ewerton Medeiros Simões, Olaf Andreas Bakke, Diógenes Félix da Silva Costa

Journal of Experimental Agriculture International, Page 1-13
DOI: 10.9734/jeai/2019/v39i430341

The changes that occur in ecosystems are increasingly coming from anthropogenic actions. In microbasins, these changes become more noticeable and can be detected using remote sensing techniques. The Rio da Cruz microbasin, meso-region of Sertão Paraibano. Field visits were made to identify the vegetation cover and forms of land use. Then, satellite images of the three-year rainy and dry periods were used: 2001, 2009 and 2017. The following steps were performed, image processing: pre-processing; processing and post-processing. Seven classes were selected: Arboreal Caatinga, Arboreal Shrub Caatinga, Anthropized Caatinga, Pastures and Agriculture, Rocky Outcrops, Water Bodies and Buildings. The results demonstrated an advance of the antropic action in the areas near the bodies of water. The temporal analysis of the watershed of the River of the Cross allowed to verify the reduction of the Arboreal Caatinga and increase of the Arboreal Shrub Caatinga, Anthropized Caatinga and Pasture and Agriculture areas in the studied years. Remote sensing techniques and knowledge of the microbasin result in relevant information on the use and cover of the land in years of regular precipitation and in conditions of greater precipitation, the arboreal vegetation is overestimated, making it difficult to identify anthropic areas during the rainy season.