R E S U M OA expressão dos caracteres de produção do trigo depende de estímulos genéticos e ambientais. Portanto, objetivou-se avaliar, neste estudo, a expressão de caracteres de produção em trigos a partir de sua aptidão tecnológica para elucidar se cultivares com maior valor de alveografia também exigem maior fornecimento de N na elaboração dos componentes de produtividade de grãos em distintos sistemas de cultivo. O delineamento experimental foi o de blocos ao acaso com quatro repetições no esquema fatorial 2 x 4, para as cultivar [BRS Guamirim (classe básico) e Fundacep Cristalino (classe melhorador)] e doses de nitrogênio [0, 60, 120, 180 kg ha -1 (sistema milho/trigo) e 0, 40, 80, 120 kg ha -1 (sistema soja/trigo)]. O maior fornecimento de N-fertilizante na elaboração dos componentes de produção de trigo não tem apoio na classe tecnológica da cultivar, independentemente do sistema de cultivo; assim, cultivares de trigo de elevada qualidade tecnológica podem expressar valores médios nos componentes de produção superiores àqueles de menor qualidade.The expression of the components of wheat yield by technological class and nitrogen use A B S T R A C TThe expression of the characteristics of wheat production depends on the genetic and environmental stimuli. Therefore, the objective of the study was to evaluate the expression of production traits in wheat from its technological ability to elucidate whether cultivars with the highest alveography also require greater supply of N in the preparation of the components of grain yield in distinct cropping systems. The experimental design adopted was a randomized block with four replications in a factorial 2 x 4, consisting of two cultivars [BRS Guamirim (basic class) and Fundacep Cristalino (improver class)] and four levels of nitrogen [0, 60, 120, 180 kg ha -1 (corn/wheat system) and 0, 40, 80, 120 kg ha -1 (soybean/ wheat system)]. The highest supply of N-fertilizer in the preparation of components of wheat production has no support in the technological class of the cultivar regardless of the cropping system. Therefore, cultivars of high quality wheat technology can express the components of mean values higher than those from lower quality produce. Palavras-chave:Triticum aestivum L. classe tecnológica nitrogênio relação C/N
The oat panicle components were changed by the forms of nitrogen use influencing productivity. The aim of the study was to determine the direct and indirect effects of oat panicle components on grain yield by N-fertilizer rates in succession systems of high and reduced release of N-residual. The study was conducted in the years 2013 and 2014 in a randomized complete block with four replications in a factorial 3 × 2, for nitrogen rates (30, 60 and 120 kg•ha −1) and oat cultivars (Barbarasul and Brisasul) the soybean/oat and corn/oat systems. The panicle weight and grain per panicle show greater sensitivity to the change of nitrogen rates. Grain yield was favored by the direct effect of harvest index panicle and indirect by grain weight per panicle. In the system soybean/oat, the grain weight of panicle shows greater efficiency in promoting positive direct effects on grain yield.
The use of productive cultivars with adaptability and stability and less demanding to fungicide use are critical to the sustainability of production factors. The objective of this work was to determine the per se performance of white oat cultivars and parameters of adaptability and stability on yield and grain quality in the proposition of cultivars more responsive in reducing the use fungicide. The study was conducted in Augusto Pestana, RS, Brazil, between the years 2010 and 2013. The experimental design was randomized blocks with six replicates, three with and three without fungicide. The study evaluated 14 white oat cultivars for yield and industrial capability. The white oat cultivars FAEM 4 Carlasul and URS Corona indicate high grain yield with stability and general adaptability, independent of chemical control. The cultivar URS Corona shows together high yield and thousand grain weight and hectoliter with general adaptability and stability in the absence of fungicide. Although no stability has been detected in industrial yield without the use of fungicides, cultivars of URS Charrua, URS Corona and URS Taura show high means with general adaptability.
The objective of the study was to analyze the genetic variability at agronomic and molecular level of apomictic genotypes of the genus Paspalum obtained by interspecific crosses of Paspalum plicatulum (sexual famale genitor) and Paspalum guenoarum (apomictic male genitor) to predict promising combinations with the sexual genitor using characters related to forage production. The study was conducted in two environments in 2010 and 2011 in Eldorado do Sul and Augusto Pestana, State of Rio Grande do Sul, Brazil. The experiment followed a randomized block design with four replicates at both locations. Seven interspecific hybrids, the two genitors (sexual "4c-4x" P. plicatulum and apomictic cultivate "Rojas" P. guenoarum) and two native genotypes of Paspalum guenoarum and cultivate Pensacola of P. notatum were used. Analysis done inagronomic and molecular levels were able to detect genetic variability among interspecific hybrids of Paspalum. Moreover, the results suggested that the hybrids H12, H13 and H20 are recommended for further hybridizations with female sexual parent obtaining elite recombinant.
High wheat yields, besides the genetic potential and edaphoclimatic conditions, are obtained by proper management and nitrogen use. The objective of the study was to define the most appropriate time for N-fertilizer application, considering the range of greatest wheat requirements, dependent on the succession system type and the predictability of favorable and unfavorable years. The study was carried out in the 2008 to 2012 years, in Augusto Pestana, Rio Grande do Sul, Brazil. The experimental design was randomized blocks with four replications, with N-fertilizer application at 0, 10, 30 and 60 days after emergence, considering the corn/wheat and soybean/wheat succession system. The study found that the best time for nitrogen fertilizer application on wheat is mostly influenced by the year of cultivation and is less influenced by the succession system type. The appropriate time for the Nfertilizer application in favorable years of cultivation was about 45 days after emergence. In unfavorable years, it must be anticipated. Regardless of the cultivation year and the succession system type, the Nfertilization at 30 days after emergence evidenced the highest means as the most stabile grain yield.
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.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.