Although accelerated aging is one of the tests most used for evaluation of the physiological quality of soybean seeds, there are few studies that relate it to other physiological tests used for the crop. In this context, the objective of this study was to investigate the relationship of accelerated aging to the results of physiological performance obtained in the vigor tests most frequently used in the soybean quality control system (germination, first count, seedling vigor classification, accelerated aging, electrical conductivity, emergence speed index, final emergence in sand substrate, and field emergence). The experiment was conducted with seeds that had different vigor levels, adopting a completely randomized experimental design with four replications. Pearson simple correlation analysis (r) and simple linear regression analysis at both 1% and 5% probability were conducted on the data. The results showed that the seedling vigor classification test (r = 0.9160) and the field emergence test (r = 0.9198) were those that best correlated with accelerated aging, followed by the germination (r = 0.8690), first count of germination (r = 0.8460), and electrical conductivity (r = 0.8912) tests.
This study aimed to compare the results of germination, vigor, and yield of high- and low-vigor soybean seeds submitted to on-farm application of biostimulant with its application via industrial treatment 60 days before sowing. The experimental design was a factorial arrangement of 6 × 2 × 2 (technology × vigor level × strategy of biostimulant application) for the laboratory experiment and of 6 × 2 (technology × strategy of biostimulant application) for the field experiment. Germination, accelerated aging, emergence in sand, seedling dry biomass, and electrical conductivity were assessed in the laboratory, while stand, one thousand-grain weight, and yield were assessed in the field. Biostimulant application in soybean seeds not coated with pesticides did not affect the physiological quality regardless of the application moment (at the day of sowing or at 60 days before sowing). However, when applied in seeds coated with fungicides and insecticides, better results of germination, vigor, and yield were obtained with the on-farm use of biostimulant.
A água é considerada um dos elementos fundamentais para a existência do homem e precisa ser de qualidade. Porém, as condições gerais de saneamento deficientes são claramente refletidas nos dados disponíveis sobre mortalidade por doenças de veiculação hídrica. A cada ano, ocorrem cerca de 3,5 milhões de mortes relacionadas ao fornecimento inadequado de água, saneamento básico e higiene, predominantemente em países em desenvolvimento. O objetivo deste trabalho foi avaliar a qualidade da água utilizada na higienização do úbere das vacas, de equipamentos e utensílios de ordenha em propriedades leiteiras dos municípios de Campo Bonito, Cascavel e Guaraniaçú -PR. Para isso, foram coletadas 32 amostras de água, oriundas de poços e minas, não tratadas, no período de abril/2009 a abril/2010 e realizadas análises por meio da contagem do Número Mais Provável de coliformes totais e Escherichia coli, de acordo com o método de Colilert. Verificou-se que 93,75% das amostras continham coliformes totais, que variaram de 2 a ≥ 2,4 x10 3 NMP/100 mL e que 37,5% continham E. coli, que variaram de 2 a 170 NMP/100 mL. A partir dos dados conclui-se que 37,5% das amostras estavam em desacordo com o padrão estabelecido pela Portaria nº 2914/2011 do Ministério da Saúde, que preconiza ausência de E.coli em 100 mL de água não tratada, proveniente de fontes e minas. Diante do contexto, propõe-se a realização de um trabalho de educação sanitária junto à população do meio rural, a adoção de medidas preventivas visando minimizar a ocorrência de enfermidades de veiculação hídrica, com a consequente melhoria da qualidade do leite produzido nessas propriedades. Palavras-chave: Qualidade da água. Leite. Zona rural. AbstractWater is considered a key element for the existence of man and needs to have a good quality. However, the general conditions of deficient sanitation are clearly reflected in the available data on mortality from waterborne diseases. The present study was aimed at evaluating the quality of the water used for the cleaning of dairy-cow teats and milking equipment on dairy farms located in the municipalities of Campo Bonito, Cascavel and Guaraniaçu, in Paraná State, Brazil. To do that, 32 samples of water, from of artesian well and sources, untreated, were taken from april/2009 through april/2010 end analysed by using the MPN (Most Probably Number) technique in the enumeration of total coliforms and E. coli, according to the Colilert method. Analysis showed that 93.75% contained total coliforms, that ranged
Modo de acesso: World Wide Web Inclui bibliografia 1. Agricultura 2. Meio Ambiente 3. Zootecnia 4. Ciências Agrárias I. REDIN, Ezequiel II. Título. CDD-630 Sônia Márcia Soares de Moura -CRB 6/1896 O conteúdo deste livro está licenciado sob a Licença de Atribuição Creative Commons 4.0. Com ela é permitido compartilhar o livro, devendo ser dado o devido crédito, não podendo ser utilizado para fins comerciais e nem ser alterada. O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos seus respectivos autores www.poisson.com.br
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