3/29/2023 0 Comments Escala de intervalo![]() ![]() A decision tree (DT) was created from a training set previously prepared. In order to obtain the images, the segmentation algorithm implemented by Definiens Developer was used. Two major techniques were used: GEOgraphic-Object-Based Image Analysis (GEOBIA) and Data Mining (DM). ![]() This research aimed to analyze the possibility to estimate and automatically map large areas of soybean cultivation through the use of MODIS (Moderate-Resolution Imaging Spectroradiometer) images. The traits number of pods containing three kernels, thousand-kernel mass of the pods with three kernels and relative contribution of pods with three kernels, have the strongest and most positive linear trends with the grain yield. number of branches was higher for BMX Potência RR BMX Classe RR, BMX Turbo RR, BMX Tornado RR e BMX Força RR cultivars. The FPS Paranapanema RR cultivar has a higher number of reproductive nodes, number of pods and number of pods per node on the main stem, but their performance is hindered because their grain present lower density.The FPS Iguaçu RR cultivar has the highest grain yield because of high relative contribution of pods with three kernels (51%). The seeding of soybean in second-crop have been conducted in southern Brazil, so it becomes necessary to know the traits to grain yield contribution of crop in this grown season.We aimed to evaluate the morphological traits and yield components of indeterminate growth habit soybean cultivars grown in second was conducted at the Federal University of Santa Maria campus Frederico Westphalen – RS, Brazil, in the 2013 summer soybean growing season, using a randomized complete blocks design with nine cultivars (FPS Paranapanema RR, BMX Classe RR, BMX Potência RR, BMX Força RR, BMX Energia RR, BMX Turbo RR, FPS Iguaçu RR, BMX Tornado RR, BMX Alvo RR), arranged in three replications. On average, 259,000 plants ha−1 was estimated for the AOPD to achieve maximum seed yield of semi‐upright cowpea grown as a second crop in fall‐winter season in southeastern Brazil. Maximum cowpea seed yields were achieved with AOPD ranging from 216,630 to 290,537 plants ha−1 (8‐24% greater than under the lowest plant density). ![]() The increase in plant density promoted increases in leaf area index and the position (measured in height) of the first pod insertion for cowpea plants, but negatively affected per‐plant scale surviving rate, leaf area, aboveground dry matter, and yield due to the intraspecific competition. The AOPD for cowpea increased as the attainable yield improved. A 3‐yr study was conducted to evaluate the effect of five plant densities (100,000 to 500,000 plants ha−1) on growth, seed yield and its components for two cowpea cultivars (BRS Guariba and BRS Novaera) in Botucatu, southeastern Brazil. However, in the scientific literature for semi‐upright cowpea cultivars grown in fall‐winter season in southeastern Brazil the AOPD is not yet clearly defined. The agronomic optimal plant density (AOPD) is one of the main management factors defining attainable yield. Inoculation and co-inoculation when carried out seven days before sowing and associated with the use of the osmoprotector, provides grain yield similar to the inoculation performed at the time of sowing.Ĭowpea cultivars with high yield potential and suitable plant architecture for mechanized harvesting have recently shown a growing interest to be cultivated as a second crop in fall‐winter season of southeastern Brazil. Co-inoculation provided an increase of 31% and 16% of yield, respectively, compared to the no-inoculation treatment, for the first and second experimental years. All treatments that used osmoprotectant had an increased 30% (in the first year) at average number of nodules in V5 compared to the treatments that did not use it. Number of grains per pod, mass of thousand grains, and A, B and total chlorophyll content were not influenced by inoculation, co-inoculation and nitrogen fertilization. The number of nodules and pods per plant are the variables most correlated with grain yield. The components of nodulation, leaf chlorophyll, plant growth and grain yield were evaluated. Nine distinct treatments of seeds inoculation were carried out with bacteria of the genus Bradyrhizobium were inoculated alone (conventional inoculation) or combined with Azospirillum brasilense (co-inoculation), associated with the use of osmoprotectants. The experimental design consisted of completely randomized blocks with four replications. The experiments were conducted during two crop seasons at "sandy clay loam Acrisol" and "Cfa climate" in Santa Maria, RS, Brazil. ![]() The objective of this study was to assess the effects of inoculation and co-inoculation of osmoprotectant soybean seeds, performed at different times of sowing. The practice of soybean seed inoculation cannot exceed the 24-hour prior to sowing. ![]()
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