Manejo da adubação e seus efeitos na ocorrência de algas e na produtividade de arroz irrigado em áreas com residual de imidazolinonas

Sartori, Gerson Meneghetti Sarzi; Marchesan, Enio; Luz, Daniéli Saúl da; Cassol, Ana Paula Vestena; Figueiredo, Maria Carolina dos Santos; Oliveira, Maria Angélica; Silveira, Marcos Venicios Evaldt da; Ferreira, Rafael Bruck

doi:10.1590/s0103-84782011000800005

Cited by 4 publications

(4 citation statements)

References 14 publications

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“…For grain yield (GY) the genotypes were classified into 3 groups, considered superior (group "a") the lines PH18402, PH18502, PH18601, PH18602, PH18701 and PH18801, as well as the control cultivars BRS Pampa, BRS Pampeira and IRGA 417. The average yields obtained in this group ranged from 4628 to 8008 kg ha -1 , where the Brazilian average is approximately 6000 kg ha -1 (CONAB, 2020), also demonstrated by Streck et al (2018), Streck et al (2019) and Sartori et al (2011).…”

Section: Resultsmentioning

confidence: 89%

Genetic trends and multivariate interrelationships for grain quality of irrigated rice genotypes

Facchinello,

Carvalho,

Streck

et al. 2023

Agron. Sci. Biotechnol.

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For genetic improvement programs, researches with multivariate approaches in rice are fundamental, to define genetic trends, clusters and correlations of agronomic characters that together help selection procedures. This work aimed to reveal the agronomic performance, trends and genetic interrelationships of grain quality based on multivariate models applied to elite lines of irrigated rice. The experiment took place in the 2017/2018 harvest, held at Estação Experimental Terras Baixas (ETB), of Embrapa Clima Temperado. The study used randomized blocks design, with three replications. There were fifteen F6 lines and four control cultivars. Evaluation of intrinsic physical quality attributes with the aid of S21 grain statistical analyzer, as well as grain yield and mill yield (whole and broken grains). Performance of analysis of variance, genetic parameters and Scott Knott cluster test, linear correlation, canonical correlations, cluster analysis via generalized Mahalanobis distance, using the Toucher method, in addition to BIPLOT principal component analysis. The results showed that PH18502 and PH18701 strains presented better agronomic performance for the studied characters, by univariate analysis. The linear and canonical correlations presented demonstrate potential in the direction of selection of multiple characters and point to the possibility of indirect selection among the relevant agronomic characters for the production chain of irrigated rice.

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Section: Resultsmentioning

confidence: 89%

Genetic trends and multivariate interrelationships for grain quality of irrigated rice genotypes

Facchinello,

Carvalho,

Streck

et al. 2023

Agron. Sci. Biotechnol.

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“…However, there is no field comparative information about algal communities in organic and conventional rice farming with herbicide application. Furthermore, the effects of herbicides on epiphytic and planktonic algae in paddy rice fields have been described mainly in mesocosms (Sartori et al 2011;Cassol et al 2013;Reck et al 2018;Liu et al 2020). This knowledge gap motivated us to investigate the phytoplankton and epiphyton in the two rice cultivation systems.…”

Section: Introductionmentioning

confidence: 99%

Do phytoplankton and epiphyton communities differ between organic and conventional rice fields?

2022

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This study aimed to determine if there are any differences in the attributes and composition of the phytoplankton and epiphyton communities between organic (OF) and conventional (CF) rice fields. We also strove to identify if there were any variations in these communities by comparing samples taken from two different periods (12 and 35 days) after the application of the herbicide clomazone and penoxsulam in CF. The farms are located in the Pampa Biome, Southern Brazil. Phytoplankton samples from the subsurface water and epiphyton samples from the rice stems were analyzed using the Utermöhl method. The CF and OF had distinct environmental conditions (pH, conductivity, and turbidity values), and the residual concentration of the herbicides decreased over time. There were no significant differences in epiphyton and phytoplankton density, or in phytoplankton richness, between the rice fields; only the epiphyton richness and taxonomic composition showed differences between the rice fields. Cyanobacteria and Chlorophyceae comprised a large proportion of the epiphytic density in CF and OF, respectively. However, Bacillariophyceae and Chlorophyceae had greater phytoplankton densities in CF and OF, respectively. The taxonomic composition of communities should be considered an effective tool to show the differences between the two cultivation systems.

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“…A cultura do arroz se destaca como uma das mais importantes no mundo, sendo considerada como um produto de importância econômica e social, em função de sua ampla adaptabilidade, resposta à aplicação de tecnologias e diversas formas de cultivo (Sartori et al, 2011). A produção média brasileira na safra 2016/17, 2017/18 e 2018/19 foi de 10,953; 12,064 e 10,653 milhões de t, respectivamente.…”

Section: Introductionunclassified

Resposta do arroz irrigado ao fornecimento de fósforo e densidade de semeadura em sistema pré-germinado

Gutz

Cunha

Olescowicz

et al. 2019

Agraria

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RESUMO: O arroz irrigado apresenta elevada importância socioeconômica para o estado de Santa Catarina, contudo, estudos que visam a definição da densidade de semeadura e a resposta do arroz irrigado ao fornecimento de fósforo ainda são escassos. Desta maneira, este trabalho teve como objetivo avaliar a produtividade do arroz irrigado, conduzido em sistema pré-germinado, em função da densidade de semeadura e da adubação fosfatada. O experimento foi conduzido em blocos casualizados e os tratamentos foram arranjados em esquema fatorial 4 x 3, com quatro repetições. Foram testadas quatro densidades de semeadura da cultivar SCS 121 CL (60, 90, 120 e 150 kg ha -1 ) e três dosagens de fósforo (0, 25 e 50 kg ha -1 de P 2 O 5 ). As variáveis avaliadas foram: número de colmos por metro quadrado, número de panículas por metro quadrado, número de panículas por planta, produtividade de grãos e o peso de mil grãos. Os resultados indicam que a supressão da adubação fosfatada pode comprometer componentes de produção importantes, como o número de panículas por m 2 e o peso de mil grãos. Contudo, os fatores densidade de semeadura e dosagem de fósforo não influenciaram a produtividade de grãos. Palavras-chave: Alto Vale do Itajaí; componentes de rendimento; Oryza sativaPaddy rice response to phosphorus supply and sowing density in pre-germinated system ABSTRACT: Paddy rice present elevated importance socioeconomic in Santa Catarina State, however, research about the sowing density and paddy rice response to phosphorus supply are scarce. Thus, this work was the objective to evaluate the paddy rice yield, cultivated in pre-germinated system, in function of sowing density and phosphate fertilization. Experiment was conduct in blocks completely randomized and the treatments are arrange in factorial scheme 4 x 3, with four replications. Was test four sowing density of SCS 121 CL cultivar (60, 90, 120 and 150 kg ha -1 ) and three phosphorus rates (50, 25 e 0 kg ha -1 of P 2 O 5 ). The variable evaluated were number of stems per meter square, number of panicle per plant, yield and thousand-grain weight. The results indicated that phosphate fertilization reduce can compromise the important yield compounds, like number of panicle per meter square and thousand-grain weight. Yet, the factors sowing density and phosphorus rate not influence the yield.Resposta do arroz irrigado ao fornecimento de fósforo e densidade de semeadura em sistema pré-germinado Rev. Bras.

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Manejo da adubação e seus efeitos na ocorrência de algas e na produtividade de arroz irrigado em áreas com residual de imidazolinonas

Abstract: 'IRGA 422 CL' and 'IRGA 417'.

Cited by 4 publications

References 14 publications

Genetic trends and multivariate interrelationships for grain quality of irrigated rice genotypes

Genetic trends and multivariate interrelationships for grain quality of irrigated rice genotypes

Do phytoplankton and epiphyton communities differ between organic and conventional rice fields?

Resposta do arroz irrigado ao fornecimento de fósforo e densidade de semeadura em sistema pré-germinado

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