Effects of preflood nitrogen rate and midseason nitrogen timing on flooded rice

Carreres, R.; Sendra, J.; Ballesteros, Rafaél; Cuadra, José García de la

doi:10.1017/s0021859699007868

Cited by 12 publications

(6 citation statements)

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“…In both sites, NUE a Downloaded by [York University Libraries] at 10:11 18 November 2014 exceeded the ones reported by Singh et al (1998) for a low-NUE japonica cultivar. Moreover, mean NUE a for site 1 was close to maximum value indicated by Carreres et al (2000) for a japonica cultivar grown under different N rates.…”

Section: N Use Efficiency (Nue)supporting

confidence: 63%

Nitrogen Application in Irrigated Rice Grown in Mediterranean Conditions: Effects on Grain Yield, Dry Matter Production, Nitrogen Uptake, and Nitrogen Use Efficiency

Artacho

Bonomelli

Meza

2009

Journal of Plant Nutrition

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Field experiments were conducted in the major rice growing area of Chile to evaluate the effects of nitrogen (N) fertilization and site on grain yield and some yield components, dry matter production, N uptake, and N use efficiency in rice cultivar 'Diamante'. Two sites (indicated as sites 1 and 2) and six N rates (0, 50, 100, 150, 200, and 300 kg N ha −1 ) were compared. Nitrogen fertilization increased yield, panicle density, spikelet sterility, dry matter production, and N uptake at maturity. 90% of maximum yield was obtained with 200 kg N ha −1 in site 1 (12,810 kg ha −1 ) and with 100 kg N ha −1 in site 2 (8,000 kg ha −1 ). These differences were explained by lower panicle density, and the resulting lower dry matter production and N uptake in site 2. Nitrogen use efficiency for biomass and grain production, and grain yield per unit of grain N decreased with N fertilization. While, agronomic N use efficiency and N harvest index were not affected. All N use efficiency indices were significantly higher in site 1, except grain yield per unit of grain N. The observed variation in N use efficiency indices between sites would reflect site-specific differences in temperature and solar radiation, which in turn, determined yield potentials of each site. On the basis of these results, cultivar 'Diamante' would correspond to a high-N use efficiency genotype for grain yield.

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Section: N Use Efficiency (Nue)supporting

confidence: 63%

Nitrogen Application in Irrigated Rice Grown in Mediterranean Conditions: Effects on Grain Yield, Dry Matter Production, Nitrogen Uptake, and Nitrogen Use Efficiency

Artacho

Bonomelli

Meza

2009

Journal of Plant Nutrition

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“…Recentemente, foi demonstrado a potencialidade do SPAD-502 para avaliar a resposta de diversas espécies à aplicação do nitrogênio (Hoel & Solhaug, 1998;Wu et al, 1998;Sainz-Rozas & Echeverria, 1998;Madakadze et al, 1999;Carreres et al, 2000;Sandoval-Villa et al, 2000).…”

Section: Abstract Spad Index For Nitrogen Status Diagnosis and Potatounclassified

Índice SPAD para o diagnóstico do estado de nitrogênio e para o prognóstico da produtividade da batata

Gil

Fontes²,

Cecon³

et al. 2002

Hortic. Bras.

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A juste no programa de fertilização nitrogenada de uma cultura pode ser conseguido por correto monitoramento e diagnóstico do estado nutricional das plantas (Huett et al., 1997) que envolve tradicionalmente a análise dos teores de N na matéria seca de folhas e posterior interpretação dos resultados. Porém, a utilização da aná-lise foliar apresenta limitações, como o tempo gasto entre a tomada das amostras e a obtenção dos resultados. Atualmente, como parte da agricultura de precisão, é necessário o sensoriamento em tempo real do estado de nutrientes da planta. Dentre as técnicas mais recentes com potencial para avaliar o estado de nitrogênio da planta em tempo real destaca-se a análise da intensidade do verde das folhas, pelo fato de haver correlação significativa entre a intensidade do verde e o teor de clorofila com a concentração de N na folha. Em doze espécies de plantas, Marquard & Tipton (1987) ), aplicadas em cobertura, 10 cm ao lado das plantas, aos 23 dias após a emergência (DAE), imediatamente antes da amontoa. Foi utilizado o sulfato de amônio. Foram feitas medições do índice SPAD no folíolo terminal da quarta folha a partir do ápice (QF) em seis épocas. A primeira (SPAD1) foi realizada três dias antes da adubação em cobertura e as demais aos 7; 17; 27; 37 e 47 dias após a aplicação de N em cobertura. Também foram determinados os índices SPAD em folhas mais velhas (FM) que a QF. Na primeira época foram determinados os teores de N na QF. O índice SPAD1 e o teor de N aumentaram de forma quadrática em função das doses de N em pré-plantio, atingindo os níveis críticos de 44,9 unidades e de 6,2 dag.kg -1 , respectivamente. Houve correlação linear e positiva entre os valores do índice SPAD1 e os da produção de tubérculos, indicando que o índice SPAD pode ser usado no prognóstico da produtividade da cultura. Em todas as épocas de amostragens, os índices SPAD na QF e na FM foram influenciados pelas doses de N porém, atingiram valores diferentes, mostrando a necessidade de padronizar a época e a folha a ser amostrada. Palavras-chave:Solanum tuberosum, clorofila, tubérculos, nível crítico. ABSTRACT SPAD index for nitrogen status diagnosis and potato yield prognosisThe SPAD critical level (Soil Plant Analysis Development) in potato leaves was established to verify the possibility of its utilization in Monalisa potato tuber yield prognosis. The experiment was installed in a Red-Yellow Argisoil having 39 mg kg -1 of mineral nitrogen content. The experiment was laid out in randomized complete blocks with split plot design and four replications. In the plot were set five N rates (0; 25; 50; 100 and 200 kg ha -1 ), applied in the furrows before planting. In the split plot were set four side-dressed N rates (0; 90; 180 and 360 kg ha -1 ), applied in bands 10 cm apart plant side at 23 days after plant emergence, before hilling. SPAD indices were obtained from the terminal leaflet of the fourth leaf from the apex (QF) for six times. The first one (SPAD1) was measured three days before the side-dress N fertilization an...

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“…However, N recovery efficiency is low in flooded culture because of N losses, primarily due to ammonia volatilization. Measurements in field trials show efficiencies lower than 50%, in both tropic (Fageria and Baligar, 2001) and temperate climates (Carreres et al, 2000). However, efficiencies close to 70% can be achieved by fertilizer application at the proper rate and time (Peng and Cassman, 1998).…”

Section: Introductionmentioning

confidence: 98%

Evaluation of the ORYZA2000 Rice Growth Model under Nitrogen-Limited Conditions in an Irrigated Mediterranean Environment

Artacho

Meza

Alcalde

2011

Chilean J. Agric. Res.

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ORYZA2000 is a growth model for tropical lowland rice (Oryza sativa L.) developed by the International Rice Research Institute and Wageningen University. This model has been evaluated extensively in a wide range of environments. However, reports examining japonica cultivars growing in temperate climates are scarce. In this study, ORYZA2000 was calibrated and evaluated using data from experiments carried out in the South-Central area of Chile. These experiments were performed on a japonica rice cultivar growing under an irrigated Mediterranean environment at various N rates. ORYZA2000 was then applied to explore potential yield and grain yield response to N fertilization under likely weather conditions in the major rice-producing area in Chile. ORYZA2000 was sufficiently accurate to simulate grain yield and crop N uptake at the end of the season. Final crop N uptake was simulated with a root mean squared error (RMSE) of 20 kg ha -1 (15%) and grain yield with a RMSE of 1666 kg ha -1 (19%). However, the prediction of biomass and N uptake of individual organs throughout the season was poor. A long-term simulation study confirmed a potential yield as high as 12 000 kg ha -1 in the Parral area, as well as the existence of a scope for yield increase. The yield response to N fertilization was predicted even at rates of 300 kg ha -1 , although a significant probability of low yields was also observed. This trend supports the need to incorporate dynamic N management in Chilean rice production.

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Effects of preflood nitrogen rate and midseason nitrogen timing on flooded rice

Cited by 12 publications

References 0 publications

Nitrogen Application in Irrigated Rice Grown in Mediterranean Conditions: Effects on Grain Yield, Dry Matter Production, Nitrogen Uptake, and Nitrogen Use Efficiency

Nitrogen Application in Irrigated Rice Grown in Mediterranean Conditions: Effects on Grain Yield, Dry Matter Production, Nitrogen Uptake, and Nitrogen Use Efficiency

Índice SPAD para o diagnóstico do estado de nitrogênio e para o prognóstico da produtividade da batata

Evaluation of the ORYZA2000 Rice Growth Model under Nitrogen-Limited Conditions in an Irrigated Mediterranean Environment

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