A B S T R A C TReductions in soybean yields are mainly linked to the occurrence of dry spells, which are becoming more frequent due to climate change. Thus, the aim of this study was to evaluate soybean cultivars irrigated with different water depths under center pivot. The experiment was conducted during the 2014/15 growing season, under center-pivot irrigation in Chapadão do Sul, MS, Brazil. The design was a randomized block in split plot with four replicates, where plots consisted of 4 water depths (0, 50, 75 and 100% of crop evapotranspiration -ETc) and the subplots of 6 soybean cultivars (NA 5909 RR, DM 5958 IPRO, Anta 82 RR, M 7110 IPRO, Desafio RR, M 7739 IPRO). The cultivar Desafio RR was the one that best responded to irrigation, increasing yield to 6174 kg ha -1 against 3798 kg ha -1 under rainfed condition. The highest yield under rainfed condition was obtained by the cultivar NA 5909 RR, reaching 4806 kg ha -1 . This shows that some cultivars can respond positively to irrigation, resulting in increased yield, depending on the genetic characteristics of each one.Lâminas de irrigação para diferentes cultivares de soja em pivô central R E S U M O As reduções de produção de soja no Brasil estão ligadas principalmente à ocorrência de veranicos, os quais estão cada vez mais frequentes devido às mudanças climáticas. Sendo assim, objetivou-se com este trabalho avaliar diferentes lâminas de irrigação em cultivares de soja irrigadas em pivô central. O trabalho foi realizado no ano agrícola 2014/15, no município de Chapadão do Sul, MS. O delineamento foi em blocos casualizados em esquema de parcelas subdivididas com quatro repetições, onde as parcelas constaram de 4 lâminas de irrigação (0, 50, 75 e 100% da Evapotranspiração da Cultura -ETc), e as subparcelas de 6 cultivares de soja (NA 5909 RR, DM 5958 IPRO, Anta 82 RR, M 7110 IPRO, Desafio RR, M 7739 IPRO). A cultivar Desafio RR foi a que mais respondeu à irrigação, alcançando produtividade de 6174 kg ha -1 com a reposição de 50% da ETc, contra 3798 kg ha -1 na condição de sequeiro. A maior produtividade no sequeiro foi com a cultivar Na 5909 RR, chegando a 4806 kg ha -1 , indicando que a resposta da cultura à irrigação está relacionada principalmente às características genéticas de cada cultivar. Key words:Glycine max (L.) Merrill. drought water deficit Palavras-chave:Glycine max (L.) Merrill. veranico déficit hídrico 1 Universidade Federal do Mato Grosso do Sul. Chapadão do Sul, MS.
O fogo é um instrumento de manejo em diversos tipos de ecossistemas, já que atua como importante agente mineralizador do solo. O objetivo deste trabalho foi comparar ocomparar o efeito da queima de resíduos sobre as propriedades quimicas do Latossolo vermelho distrófico do Cerrado. O ambiente estudado foi uma lavoura de milho, sendo composta de quatro sistemas de manejo: manejo sem queima de resíduos não revolvimento do solo (SSQNR) e manejo sem queima e revolvimento do solo (SSQR); manejo com queima de resíduos não revolvimento do solo (SCQNR) e queima de resíduos com revolvimento do solo (SCQR). Para a determinação dos atributos químicos, o teor de carbono orgânico e matéria orgânica do solo, foram coletadas amostras de solo na profundidade de 0,0-0,05 e de 0,10-0,20 m. Não houve interação entre os tipos de manejo de solo para os nutrientes K, Al, Ca, Mg, para as relações Ca+Mg, H+Al, matéria orgânica (MO), carbono orgânico (CO) e saturação por Al (m%) em função da queima, houve diferença significativa, entre as camadas do solo para os teores de MO, K, Ca, Mg, Al, Ca+Mg e CO (Tukey, 5%).Palavras-chave: queimada, fertilidade do solo, manejo cultural. EFFECTS OF FIRE IN CHEMICAL ATTRIBUTES OF A RED LATOSOL CERRADO DYSTROPHICABSTRACTFire is a management tool for various types of ecosystems, it acts as an important soil mineralization agent. The objective of this study was to compare the effect of burning under the ground in two areas of cultivation. The study setting was a corn crop, consisting of four management systems: soil without revolved not burning (SSQNR) and upturned soil without burning (SSQR); a soil with no upturned burning (SCQNR) and an upturned soil with burning (SCQR). To determine the chemical properties, organic carbon content and soil organic matter, soil samples were collected in depth from 0.0-0.05 and 0.10-0.20 m. There was no interaction between the types of soil management for nutrients K, Al, Ca, Mg, Ca + Mg for relationships, H + Al, MO, CO and Al saturation (m%). As a function of burning, there was significant difference when used the Tukey test at 5% probability relative depth to the organic matter, K, Ca, Mg, Al, Ca + Mg and CO.Keywords: burned, soil fertility, cultural management. DOI: http://dx.doi.org/10.14583/2318-7670.v04n04a06
Considering the hypothesis that soybean cultivars present different yield potential, even under ideal water conditions, this study aimed to identify highly productive soybean cultivars under optimal conditions of soil moisture management. Two experiments were conducted in the 2015/16 and 2016/17 crop seasons in Chapadão do Sul-MS, in a complete In a split-plot arrangement design with four replications. In the first experiment, the plots was composed of six water application frequencies (0, 1, 2, 3, 4, and 5 days); in the second experiment, the primary factor was constituted by six supplementary irrigation levels (0, 25, 50, 75, 100, and 125% of the Crop Evapotranspiration - ETc). In each experiment, subplots was composed of five soybean cultivars. The following variables were evaluated: plant height, insertion of the first pod, hundred grain weight, and grain yield. Regardless of the irrigation management used, soybean cultivars presented different agronomic performance.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.