Nitrogen Dilution Curves and Nitrogen Use Efficiency During Winter–Spring Growth of Annual Ryegrass

Marino, María A.; Mazzanti, A.; Assuero, Silvia Graciela; Gastal, François; Echeverría, Hernán Eduardo; Andrade, Fernando H.

doi:10.2134/agronj2004.0601

Cited by 56 publications

(62 citation statements)

References 30 publications

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“…Así, se puede sugerir que la calidad del pasto, respecto a su contenido de PC disminuye en la época de lluvias lo cual puede ser asociado con el crecimiento rápido del pasto en esta época. Greenwood et al (1990) y Marino et al (2004) entre otros han denominado a dicho fenómeno "dilución del nitrógeno (N)", o dilución de la proteína (N x 6.25).…”

Section: Resultados Y Discusión Composición Nutrimental De Los Forrajunclassified

“…Thus, it can be suggested that the quality of grass, about their PC content decreases in the rainy season which can be associated with the rapid growth of the grass at this time. Greenwood et al (1990) and Marino et al (2004) among others have called this phenomenon "dilution of nitrogen (N)", or dilution of the protein (N x 6.25).…”

Section: Resultados Y Discusión Composición Nutrimental De Los Forrajmentioning

confidence: 99%

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Producción y calidad nutrimental de forrajes en condiciones del Trópico Húmedo de México

Muñoz-González

Huerta-Bravo

Bueno

et al. 2017

Remexca

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ResumenCon el objetivo de determinar la calidad nutrimental de los forrajes en un sistema de producción de bovinos doble propósito en el sureste de México, se tomaron muestras de forrajes utilizando jaulas de exclusión y del forraje disponible en la pradera mediante Hand Plucking para determinar: contenido de proteína cruda (PC), fibra detergente neutro (FDN), fibra detergente ácido (FDA) y los minerales cobre (Cu), hierro (Fe), cinc (Zn), calcio (Ca), magnesio (Mg), sodio (Na), potasio (K) y fósforo (P) en cinco ranchos ganaderos del trópico húmedo de Chiapas, a través del año. El análisis de los datos consideró los efectos fijos de rancho, mes del año, época del año, especie forrajera y técnica de muestreo utilizada. Hubo diferencias (p< 0.05) entre ranchos y épocas del año en el contenido PC, FDN, FDA y entre ranchos en el contenido de minerales; hubo diferencias (p< 0.05) entre los meses del año y entre especies forrajeras en el contenido de FDN y FDA, y diferencias (p< 0.05) en los contenidos de PC, FDN, FDA, Cu, Zn, Mg, Na y K entre las técnicas de muestreo utilizadas. Se concluye que la calidad nutrimental de los forrajes, es afectada por la época del año, siendo la época de lluvias y nortes donde se da el mayor contenido de AbstractIn aim to determine the nutritional quality of forages in a production system of dual purpose bovines in southeastern Mexico, forage samples were taken using exclusion cages and forage available in the meadow by Hand Plucking to determine: content crude protein (PC), neutral detergent fiber (FDN), acid detergent fiber (FDA) and the minerals copper (Cu), iron (Fe), zinc (Zn), calcium (Ca), magnesium (Mg), sodium (Na ), potassium (K) and phosphorus (P) in five cattle ranches in the humid tropics of Chiapas, throughout the year. The data analysis considered the fixed effects ranch month of the year, time of year, forage species and sampling technique used. There were differences (p< 0.05) between seasons ranches and content PC, FDN, FDA and between ranches in mineral content; there were differences (p< 0.05) between the months of the year and between forage species in the content of FDN and FDA, and differences (p< 0.05) in the contents of PC, FDN, FDA, Cu, Zn, Mg, Na and K between sampling techniques used. It is concluded that the nutritional quality of forages is affected by the season, being the rainy season and norths where there is the greatest FDN, but with lower contents of PC and FDA. The 100, 28 and 72% of samples of fodder had values below the minimum 2016 FDN, pero con menores contenidos de PC y FDA. El 100, 28 y 72% de las muestras de forrajes tuvieron valores por abajo del nivel mínimo de Cu, Zn y P, respectivamente. Los forrajes colectados en las jaulas de exclusión tuvieron 6, 10, 23, 11 y 53% más PC, FDA, Cu, Zn y Na, respectivamente, que los forrajes disponibles en la pradera.Juan Carlos Muñoz-González et al. 3316 Rev. Mex. Cienc. Agríc. Pub. Esp. Núm. 16 16 de mayo -29 de junio,Palabras clave: bovinos, doble propósito, épocas del año, tasa de crecimiento. Int...

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Section: Resultados Y Discusión Composición Nutrimental De Los Forrajunclassified

Section: Resultados Y Discusión Composición Nutrimental De Los Forrajmentioning

confidence: 99%

Producción y calidad nutrimental de forrajes en condiciones del Trópico Húmedo de México

Muñoz-González

Huerta-Bravo

Bueno

et al. 2017

Remexca

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“…The critical N dilution curve represents the upper limit of plant N concentration with which maximum biomass yield can be achieved during growth. Both critical and general N dilution curves have been empirically determined for many crops (Flénet et al 2006;Gislum and Boelt 2009;Herrmann and Taube 2004;Lemaire et al 2008;Marino et al 2004). Values below the critical N dilution curve represent sub-optimal nutrient conditions and values above represent supra-optimal conditions (Gastal and Lemaire 2002).…”

Section: Introductionmentioning

confidence: 99%

Improved estimation of nitrogen uptake in grasslands using the nitrogen dilution curve

Reyes

Schellberg

Siebert

et al. 2015

Agron. Sustain. Dev.

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The nitrogen (N) dilution curve is a useful tool for farmers to assess the effectiveness of fertilizer application. The N dilution curve describes the decrease in plant N as biomass increases. This concept has not yet been tested for its applicability and robustness under different cutting regimes in grasslands. We conducted a principal components analysis on biomass yield and N concentration data to discern relationships among experimental, climatic, and management factors. Next, two N dilution curve parameters were calibrated for different cutting frequencies. We compared N uptake using four different methods utilizing calibrated N dilution curves, a reference curve, and different cutting regimes representing different physiological ages of the crops at cutting. Our results show that excluding cutting frequency information overestimates values of N uptake. Calibration of the N dilution curve according to cutting frequency improves N uptake estimates relative to observed values. Therefore, N uptake is better estimated using both the N dilution curve and the cutting regime information.

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“…This is supported by the fact that maximum yields with the use of urea are expected to be lower than with CAN (Van Burg et al, 1982). The relatively lower DMY levels encountered in the grass fertilised with urea did not lead to increased N content in harvested plant material (N PLANT ); conversely, CAN or nBTPT-U did not show a dilution effect (Marino et al, 2004). …”

Section: Comparison Of the Three N Sourcesmentioning

confidence: 89%

Evaluation of calcium ammonium nitrate and urea-based fertilisers applied to grassland in Ireland

Antille¹,

Hoekstra²,

Ernfors³

et al. 2013

2013 Kansas City, Missouri, July 21 - July 24, 2013

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Nitrogen Dilution Curves and Nitrogen Use Efficiency During Winter–Spring Growth of Annual Ryegrass

Cited by 56 publications

References 30 publications

Producción y calidad nutrimental de forrajes en condiciones del Trópico Húmedo de México

Producción y calidad nutrimental de forrajes en condiciones del Trópico Húmedo de México

Improved estimation of nitrogen uptake in grasslands using the nitrogen dilution curve

Evaluation of calcium ammonium nitrate and urea-based fertilisers applied to grassland in Ireland

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