Response of rice cultivars to nitrogen in upland conditions

Mingotte, Fábio Luíz Checchio; Hanashiro, Renata Kimie; Filho, Domingos Fornasieri

doi:10.1590/s0034-737x2013000100013

Cited by 6 publications

(7 citation statements)

References 15 publications

(29 reference statements)

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“…In general, increase in the doses of N raises rice yields due to the increase in the number of filled grains (MINGOTTE; HANASHIRO;FORNASIERI FILHO, 2013). Apart from the dose, whose increase promotes increase in the number of spikelets and filled spikelets, the moment of N application is critical for the yield (YOSEFTABAR, 2013).…”

Section: Upland Rice Production Variablesmentioning

confidence: 99%

“…However, Barreto et al (2012) did not observe significant effects of N doses on the MHG of the upland rice cultivar BRS Sertaneja, similarly to Zhang et al (2008) who working with other rice varieties. There are also reports of reductions in mass of 100 grains with increasing levels of N (BUZETTI et al, 2006;MINGOTTE;HANASHIRO;FORNASIERI FILHO, 2013). According to Kischel et al (2011) this can be due to excess nitrogen, resulting in luxury consumption in which the plant prioritizes growth at the expense of grain mass.…”

Section: Upland Rice Production Variablesmentioning

confidence: 99%

“…In the present work, when biochar was not applied, a 52% increase in the number of panicles was observed when N doses increased from 0 to 30 kg ha -1 , whereas with the dose of 10,500 kg ha -1 of biochar, the increase was 50% between the dose 0 and the dose of 60 kg ha -1 of N and 80% between the dose 0 and the dose of 90 kg ha -1 of N. According to Buzetti et al (2006), who observed a positive response of rice to nitrogen fertilization in terms of number of panicles per area and number of grains per panicle, panicle number per area is directly related to rice productivity. In a similar study, Mingotte, Hanashiro and Fornasieri Filho (2013) stated that variables related to panicles are determined by the application of nitrogen, e.g. the number of panicles which increases significantly with nitrogen fertilization.…”

Section: Upland Rice Production Variablesmentioning

confidence: 99%

“…Therefore, low spikelet sterility under high doses of N is an important criterion in the selection of rice genotypes (BARRETO et al, 2012;MINGOTTE;HANASHIRO;FORNASIERI FILHO, 2013). Decrease in spikelet sterility is one of the causes of the increase in yield when the application of N is split.…”

Section: Upland Rice Production Variablesmentioning

confidence: 99%

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Biochar as Soil Conditioner in the Succession of Upland Rice and Cowpea Fertilized With Nitrogen

et al. 2017

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-The effects of biochar and nitrogen application on yields of upland rice and cowpea and on soil fertility were determined in a greenhouse in Macaíba, RN, Brazil. The trial consisted of the succession of two crops in a completely randomized design and a factorial scheme, with four replicates. Initially, four doses of biochar and four doses of nitrogen were tested for cultivation of rice. Subsequently, four doses of biochar and two doses of nitrogen were tested in half of the pots maintained for planting cowpea. Soil was sampled after rice harvest for half of the pots and at end of the trial for the remaining pots. We evaluated the following parameters: mass of hundred grains of rice, dry shoot mass, panicle number, number of filled spikelets and of empty spikelets, and grain production. Determinations for cowpea were: pod number per pot, grain number per pod, and grain production per pot. Measured soil parameters were: pH, contents of organic carbon, P, K, Ca, Mg, Na, cation exchange capacity, and exchangeable sodium percentage. Biochar addition did not influence yield components of upland rice and cowpea, but resulted in increased soil N retention, which influenced rice dry shoot mass, spikelets sterility, panicle number, and grain mass. Biochar also promoted increased soil pH, potassium content, and exchangeable sodium percentage and decreased calcium and magnesium concentrations.Keywords: Oryza sativa. Vigna unguiculata. Charcoal. Carbon sequestration. CARVÃO VEGETAL COMO CONDICIONADOR DE SOLO NA SUCESSÃO ARROZ E FEIJÃO-CAUPI ADUBADOS COM NITROGÊNIORESUMO -Os efeitos da aplicação de carvão vegetal e nitrogênio sobre a produtividade de arroz de terras altas e feijão-caupi e a fertilidade do solo foram determinados em ambiente protegido em Macaíba, RN, Brasil. O experimento constou de dois cultivos sucessivos em delineamento experimental completamente casualizado em arranjo fatorial, com quatro repetições. Inicialmente, foram testadas quatro doses de carvão vegetal e quatro de nitrogênio para a cultura do arroz. A seguir, foi cultivado feijão-caupi em metade dos vasos (quatro doses de carvão e duas de nitrogênio). O solo foi amostrado após a colheita do arroz, em metade dos vasos, e ao final do experimento, nos vasos restantes. Do arroz foram determinados, massa de cem grãos e, por vaso, massa seca da parte aérea, número de panículas, número de grãos cheios e grãos vazios e produção de grãos. Do feijão-caupi foram determinados: número de vagens por vaso, número de grãos por vagem e produção de grãos por vaso. No solo foram determinados: pH, teores de carbono orgânico, P, K, Ca, Mg e Na, capacidade de troca de cátions e percentagem de sódio trocável. As doses de carvão vegetal não influenciaram nas características de produção do arroz e feijão-caupi, mas favoreceram a retenção de nitrogênio no solo, que se refletiu sobre massa seca da parte aérea do arroz, esterilidade das espiguetas, número de panículas e massa dos grãos. Além disso, promoveram aumento no pH, teor de potássio e percentagem de sódio tro...

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Section: Upland Rice Production Variablesmentioning

confidence: 99%

Section: Upland Rice Production Variablesmentioning

confidence: 99%

Section: Upland Rice Production Variablesmentioning

confidence: 99%

Section: Upland Rice Production Variablesmentioning

confidence: 99%

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Biochar as Soil Conditioner in the Succession of Upland Rice and Cowpea Fertilized With Nitrogen

et al. 2017

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“…The N is one of the main nutrients involved in productivity (FAGERIA; BARBOSA FILHO, 2001;BALIGAR, 2005;MINGOTTE et al, 2013) and in improving the nutritional grain quality of rice (MINGOTTE et al, 2012;CHEN et al, 2012). It is the second macronutrient required by rice plants (103 kg of N to produce 3 t of grains ha -1 ) and the first in harvest exportation (34 kg of N t -1 of grains) (MALAVOLTA et al, 1997;FORNASIERI, 2006;MINGOTTE et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Agronomic efficiency and grain quality of upland rice cultivars as a function of nitrogen topdressing

Mingotte¹,

Gonçalves²,

Yada³

et al. 2015

Biosci. J.

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ABSTRACT:This study aimed to evaluate the agronomic efficiency and grain quality of rice cultivars as a function of nitrogen application in upland conditions with supplemental sprinkler irrigation. The experiment was carried out in 2012/13 at Jaboticabal-SP on a randomized block and split plots design with four replications. The plots were composed of twelve rice cultivars (BRS Aroma, BRS Monarca, BRS Primavera, BRS Sertaneja, BRSMG Curinga, Caiapó, CIRAD 141, Guarani, IAC 165, IAC 201, IAC 202, and IAC 25), and two levels of nitrogen application (0 and 100 kg of N ha -1 ) in topdress at the R 1 stage (panicle differentiation) as subplots. The N application intensifies the degree of lodging, mainly at Caiapó, Guarani, IAC 165, IAC 201 and IAC 25 cultivars. The N application affects the number of sterile spikelets per panicle, mainly in CIRAD 141, BRS Sertaneja, IAC 202, and BRS Aroma cultivars. Caiapó cultivar shows higher grain yield and agronomic efficiency in function of N application, followed by BRS Monarca, BRSMG Curinga, IAC 165, and IAC 202. Although Caiapó, CIRAD 141, Guarani, IAC 165, IAC 202, and IAC 25 cultivars present better results, all the others cultivars also present acceptable values of milling yield, without N application effects. The grain protein content in rice is increased by the N topdressing application.

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Mix of trinexapac-ethyl and nitrogen application to reduce upland rice plant height and increase yield

et al. 2021

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Response of rice cultivars to nitrogen in upland conditions

Cited by 6 publications

References 15 publications

Biochar as Soil Conditioner in the Succession of Upland Rice and Cowpea Fertilized With Nitrogen

Biochar as Soil Conditioner in the Succession of Upland Rice and Cowpea Fertilized With Nitrogen

Agronomic efficiency and grain quality of upland rice cultivars as a function of nitrogen topdressing

Mix of trinexapac-ethyl and nitrogen application to reduce upland rice plant height and increase yield

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