Adubação nitrogenada sobre rendimento industrial e composição dos grãos de arroz irrigado

Silva, Leila Picolli da; Alves, Bruna Mendonça; Silva, Leandro Souza da; Pocojeski, Elisandra; Kaminski, Tiago André; Roberto, Bruna Sampaio

doi:10.1590/s0103-84782013005000055

Cited by 7 publications

(5 citation statements)

References 11 publications

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“…For this characteristic, significant results were obtained for crop season, which had a superiority of non-chalkiness grains (96,72%), of higher quality, in 2016/2017 crop season, when compared with result obtained in the 2015/2016 crop season (88%). Silva et al (2013) share the results that increasing doses of N decrease the degree of grain chalkiness, besides decreasing the number of broken grains. Positive results were also found by Silva et al (1987) which obtained a higher percentage of translucent grains with N applications in the cultivars IAC-435 and IR-665.…”

Section: Resultssupporting

confidence: 53%

Upland rice agronomic performance in response to different doses and sources of nitrogen

et al. 2020

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The aim of the present study was to evaluate the response of different doses and sources of nitrogen (N) on agronomic characteristics in upland riceas well astheclimaticand environmentalinfluence on nitrogen fertilization results. Theexperiments were conducted in the University of Lavras, during 2015/2016 and 2016/2017 crop seasons, the plots consisted of 4 lines of 3 linear meters, with spacing among rows of 35 cm and a useful plot of 4.2 m2. The experimental design was a randomized complete block design with three replications in a 4x4x 2factorial design. The factor doseconsisted in 0, 50,100 e 200 kg ha-1N and the factor sourcesconsisted in ammonium nitrate, ammonium sulphate, urea and polycote, totaling 16 treatments. The characteristics evaluatedwere plant height, grain yield, grain chalkness, 1000 grainsweight andyield. It was concluded that the addiction of doses and Nsources didnot change the agronomic performanceof the upland rice crop. There is an influence of the environment on the responses of plants to nitrogen application, being observed different results in different cropseasons.

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Section: Resultssupporting

confidence: 53%

Upland rice agronomic performance in response to different doses and sources of nitrogen

et al. 2020

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“…() reported that the greater availability of N elicited a reduction of grains with chalkiness, which, according to Marchezan, Daria, and Torres (), is characterized by grain opacity caused by the arrangement between starch and protein granules in the cells that results in a higher percentage of broken grains. Thus, there is increased accumulation of starch and proteins in rice grains with increasing N availability; this results in densely compacted starch granules, with the space between them occupied by protein bodies (Zhou et al., ), increasing grain resistance to breakage (Silva et al., ). Therefore, the improved levels of N in rice cultivated on sunn hemp, pigeonpea, and millet + sunn hemp straw reduced the breakdown of grains during rice milling, favoring higher industrial quality.…”

Section: Resultsmentioning

confidence: 99%

Do cover crops improve the productivity and industrial quality of upland rice?

et al. 2020

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Global rice (Oryza sativa L.) cultivation is expected to increase, especially in upland no‐tillage systems (NTS). The difficulty in producing and maintaining straw in NTS in the Brazilian Cerrado and comparative regions worldwide can be overcome by using cover crops in irrigated areas. The potential of straw accumulation, soil cover maintenance, and nutrient cycling is considered while choosing cover crop species, because these characteristics may interfere with subsequent crop cultivation. This study was conducted to determine whether cover crops could benefit the development, productivity, and industrial quality of upland rice grains irrigated by sprinklers and cultivated in succession. The experiment was conducted in the Cerrado, with a summer rainy season and a dry winter. The treatments consisted of six cover crops (millet [Pennisetum glaucum], sunn hemp [Crotalaria juncea], pigeonpea [Cajanus cajan], millet + sunn hemp, millet + pigeonpea, and fallow) sowed in winter or spring. Compared to fallow, the cover crops cultivated in winter or spring led to increased straw production, accumulation of approximately 150% more nitrogen in straw, and possibly improved rice nutritional value because of the higher N content. Rice plants cultivated after sunn hemp developed a greater dry mass than rice cultivated after the fallow treatment. Grain yield was not influenced by the cover crops. However, sunn hemp cultivation increased the milling yield, head rice yield, and the milled rice productivity (MRP), compared to cultivation following the fallow treatment. Cultivation of sunn hemp before the upland rice crop improved MRP compared to that following the fallow treatment.

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“…Possivelmente isso se deve à obtenção de grãos mais translúcidos, os quais apresentam maior resistência à quebra no processo de polimento. Dados da literatura sugerem que o rendimento industrial de grãos é mais influenciado pelos genótipos e pelas condições ambientais, e que os efeitos da aplicação de N não são constantes (Freitas et al, 2007;Silva et al, 2013). Na cultivar Epagri 109, efeitos significativos da interação entre aplicação de fungicidas e manejo de N foram observados apenas sobre a massa de grãos, a qual foi maior na aplicação de N realizada conforme a recomendação local que na baseada no clorofilômetro, na presença de fungicidas (Tabela 4).…”

Section: Resultsunclassified

Utilização De Sensor Portátil Para Recomendação De Adubação Nitrogenada Associada Ao Uso De Fungicidas Em Arroz Irrigado

Santos¹,

Santos

Filippi

et al. 2017

RBAS

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O objetivo do trabalho foi determinar a influência da presença ou ausência da aplicação de fungicidas, e dos manejos de nitrogênio, com base no uso do clorofilômetro e de acordo com a recomendação local, naprodutividade de grãos e nas características agronômicas das cultivares BRS Tropical e Epagri 109 de arroz irrigado, em várzea tropical. A pesquisa foi conduzida em um Gleissolo Háplico distrófico de várzea,por dois anos consecutivos. O delineamento experimental usado foi o de blocos casualizados, com quatro repetições, no esquema de parcelas divididas constituídas pelas aplicações de fungicidas, as subparcelas,pelas cultivares e, as subsubparcelas, pelos manejos de nitrogênio. A adubação nitrogenada com base no uso do clorofilômetro é realizada nos momentos de maior demanda do nutriente pelas plantas e, na ausência de fungicidas, propicia aumento na produtividade de grãos e na eficiência de uso de nitrogênio. Esse manejo de nitrogênio associado com a aplicação de fungicidas promove melhoria no perfilhamentoe no rendimento industrial de grãos. A necessidade da aplicação de fungicidas em arroz irrigado é maior quando a adubação nitrogenada em cobertura é efetuada tardiamente em épocas pré-determinadas deacordo com as recomendações tradicionais.

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Adubação nitrogenada sobre rendimento industrial e composição dos grãos de arroz irrigado

Cited by 7 publications

References 11 publications

Upland rice agronomic performance in response to different doses and sources of nitrogen

Upland rice agronomic performance in response to different doses and sources of nitrogen

Do cover crops improve the productivity and industrial quality of upland rice?

Utilização De Sensor Portátil Para Recomendação De Adubação Nitrogenada Associada Ao Uso De Fungicidas Em Arroz Irrigado

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