Carlos maria Ferri

Carlos maria Ferri
Universidad Nacional de La Pampa · Pasture production and utilization

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36
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Publications

Publications (36)
Article
Full-text available
The measurement of pasture morphological development is critical to the purpose of implementing management practices. The objective was to quantify the mean stage of morphological development, to analyze its variation through thermal time and to establish the relationship between mean stage of development and green leaf blade proportion of digitgra...
Article
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The aim of this work was to elaborate a glossary which facilitates the access to a single and concise definition of key terms used by the discipline of Pasture Production and Utilization. A catalogue is presented considering the most relevant terms and concepts of major approval by consensus, which are addressed by literature and internationally ac...
Article
Full-text available
The aim of this work was to elaborate a glossary which facilitates the access to a single and concise definition of key terms used by the discipline of Pasture Production and Utilization. A catalogue is presented considering the most relevant terms and concepts of major approval by consensus, which are addressed by literature and internationally ac...
Article
The aim of this work was to elaborate a glossary which facilitates the access to a single and concise definition of key terms used by the discipline of Pasture Production and Utilization. A catalogue is presented considering the most relevant terms and concepts of major approval by consensus, which are addressed by literature and internationally ac...
Chapter
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En el presente artículo se consideran y discuten aspectos relacionados con el por qué, cómo y dónde utilizar gramíneas perennes exóticas, en la región Pampeana semiárida central, en el contexto de la intensificación ganadera y del cambio climático. Así como, sus principales características y limitaciones para su producción y utilización en la regió...
Data
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Resumen Los objetivos fueron evaluar, en una pastura diferida de mijo perenne (Panicum coloratum L.) cv Verde con diferentes fechas de inicio del período de acumulación de forraje, la heterogeneidad vertical en composición morfológica y química, digestibilidad in vitro de la materia orgánica y consumo diario de materia orgánica de ovinos en pastore...
Article
Full-text available
Green leaf proportion is an important factor affecting nutritive value, ingestive behavior and forage intake. Determination of green leaf proportion by hand separation of plant samples is time consuming and expensive. The aim of this work was to establish whether a stable relationship exists between the proportion of green leaf blade and total mass...
Data
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Introducción La Región Pampeana semiárida cuenta con miles de hectáreas cubiertas con Pasto llorón (Eragrostis curvula), gracias al trabajo de difusión que durante décadas realizó el Ing. Guillermo Covas. Esta gramínea de ciclo primavero-estival se expandió rápidamente por su elevada productividad y perennidad, permitiendo frenar y revertir severos...
Data
The ontogenic evolution of nitrogen concentration in two rye cultivars, one of fast and the other one of moderate initial growth, was evaluated by vector diagrams. A field trial was carried out using a randomized complete block design, with a 2 x 6 factorial arrangement (cultivars x clipping dates) of treatments and three replications, during two c...
Article
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Kleingrass (Panicum coloratum L. var. coloratum) is a perennial warm-season grass that begins its growing season later in the spring than does weeping lovegrass (Eragrostis curvula (Schrad.) Nees), which suggests that combining weeping lovegrass with kleingrass in a grazing sequence could increase livestock production. The objectives of this study...
Article
Full-text available
Kleingrass (Panicum coloratum L. var. coloratum) is a perennial warm-season grass that begins its growing season later in the spring than does weeping lovegrass (Eragrostis curvula (Schrad.) Nees), which suggests that combining weeping lovegrass with kleingrass in a grazing sequence could increase livestock production. The objectives of this study...
Article
Full-text available
The estimation of daily feed intake is important in the determination of animal production The objective of this experiment was to compare measurements of animal forage intake obtained by the use of four techniques: pre- and post-grazing difference in standing forage mass, total daily feces collection in combination with in vitro diet digestibility...
Article
Full-text available
The spatial heterogeneity in the structure and the productivity of the vegetation was examined in a tall fescue (Festuca arundinacea Schreb.) pasture rotationally grazed at four stocking densities in the Pampean region of Argentina. The examined pasture was grazed at the stocking densities of 3.6, 4.6, 5.6 and 6.6 animals ha−1 with a two-paddock 14...
Article
Full-text available
Tasa de aparición de hojas durante tres temporadas de crecimiento en Panicum coloratum L. cv Verde Rate of leaf appearance during three growing-seasons in Panicum coloratum L. Resumen El objetivo del presente trabajo fue cuantificar la relación del tiempo cronológico y térmico con la tasa de aparición de hojas de mijo perenne (Panicum coloratum L.)...
Article
Full-text available
Resumen Los factores climáticos, especialmente las lluvias, son determinantes de los resultados productivos en la región semiárida central del país. El escenario climático está variando en el mundo, y en esta región ya han sido detectados cambios importantes, incluyendo mayor variabilidad en las precipitaciones, disminución de la temperatura máxima...
Article
Full-text available
A B S T R A C T The objectives were to characterize the structures of a Panicum coloratum L. cv. Verde pasture resulting from different forage accumulation periods, to assess if the rates of blade accumulation are constant on time, and to determine the variable (chronological or ther- mal time) best correlated to predict this process. The treatment...
Article
Full-text available
The objectives were to characterize the structures of a Panicum coloratum L. cv. Verde pasture resulting from different forage accumulation periods, to assess if the rates of blade accumulation are constant on time, and to determine the variable (chronological or thermal time) best correlated to predict this process. The treatments were established...
Article
Full-text available
Los objetivos fueron caracterizar la estructura de una pastura de Panicum coloratum L. cv. Verde, resultante de diferentes duraciones del período de acumulación de forraje, analizar si las tasas de acumulación de lámina son constantes en el tiempo, y determinar la variable de mayor ajuste (tiempo cronológico o térmico) para predecir dicho proceso....
Article
Herbivores select plant parts to maximize the quality of their diets. However, there are few procedures available to quantify the relative consumption of leaf blades. In this study, we initially identified epidermal features that were specific of the blade in 4 grasses: Kleingrass (Panicum coloratum L.), tall wheatgrass (Thinopyrum ponticum [Podp.]...
Article
The effects of nitrogen (N) fertilization of a rye pasture (Secale cereale L.) on the chemical composition of forage and its utilization in vivo and in situ were investigated in winter (W) and early spring (S). Half of the paddock to be assayed was spread with 93 kg urea–N ha−1 (treatment F), and the other half was not fertilized (treatment NF). Ea...
Article
Full-text available
It was proposed that the digestibility of organic matter (OMD) can be estimated from the relationship between total fecal nitrogen (TFN, as a % of organic matter intake (OMI)) and fecal nitrogen concentration (FNc) through the equation: OMD = 1 - TFN / FNc. Two assumptions are critical to this equation, total fecal nitrogen (as a % of OMI) is a con...
Data
Full-text available
La Región Pampeana semiárida cuenta con miles de hectáreas cubiertas con Pasto llorón (Eragrostis curvula), gracias al trabajo de difusión que durante décadas realizó el Ing. Guillermo Covas. Esta gramínea de ciclo primavero-estival se expandió rápidamente por su elevada productividad y perennidad, permitiendo frenar y revertir severos procesos ero...
Article
Full-text available
Se determinó la ingestión de nutrientes en Panicam coloraturn L., a cuatro niveles de oferta de forraje (OF) (15, 30, 45 y 60 g de MS - kg. PV ' - día-'). Se emplearon seis ovinos por tratamiento durante un período de me-dición de ocho días. La cantidad de forraje en prepastoreo (Fpre) se estimó a partir de cortes a nivel del suelo y la cantidad re...
Article
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Switchgrass (Panicum virgatum cv. Alamo) standing hay was cut and offered to 16 rams. The rams were randomly allocated to one of the following levels of feeding: 0.5; 1.0; 1.5 and 2.0 × maintenance. The forage was offered twice a day to the animals; no supplements were given. The animals were individually penned and fitted with faeces collection ba...
Article
Full-text available
The voluntary intake and digestibility of kleingrass (Panicum coloratum cv. Verde) were measured in seven periods, comprising one full year. The forage was offered twice a day ad Iibitum to .seven rams, frtted with faces collection bags; each experimental period was composed of 8 days for adaptation and 8 days for collection of data. The dry matter...
Article
Full-text available
The use of standing dead biomass, during the winter that was produced by warm-season grasses in the previous growing season by pregnant beef cows may be an alternative to grazing systems in the semi-arid Pampean Region of Argentina. This study, con-ducted over 2 years, 1990 and 1991, compared the winter forage quality produced during the previous g...
Article
Full-text available
Resumen Los objetivos del presente trabajo fueron, (i) determinar la acumulación de materia seca (MS) y la concentración de N en la MS y (ii) estimar la eficiencia de uso aparente del N (EUN) y sus componentes: las eficiencias de asimilación (EAN) y de conversión del N (ECN) en monoculturas de Panicum coloratum L. cv. Verde. El experimento se efect...
Article
Full-text available
This study was performed with grazing sheep, to establish: a) if the amount of total faecal N (C; in g 100g -1 of organic matter intake (OMI)) remains constant at three feeding levels, in four utilisation periods of deferred Panicum coloratum cv. Verde; b) the relationship between C and faecal N fractions, and c) the relationship between faecal dai...

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