In Situ Dry Matter, Nitrogen, and Fiber Degradation of Alfalfa, Red Clover, and Eastern Gamagrass at Four Maturities

Coblentz, W.K.; Fritz, J. O.; Fick, Walter H.; Cochran, R.C.; Shirley, John E.

doi:10.3168/jds.s0022-0302(98)75562-6

Cited by 80 publications

(92 citation statements)

References 34 publications

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“…In addition, the ratio of leaf tissue was higher for red clover (84%) than for lucerne (65%). The data of Coblentz et al [14] showed that the degradability of lucerne and red clover are similar while in our results [6], red clover was less degraded than lucerne. Nocek and Grant [39], Albrecht and Broderick [2], Le Goffe et al [30], Hvelplund and Weisberg [27] and Hoffman et al [23] also reported that red clover has a lower nitrogen degradation than lucerne.…”

Section: Discussioncontrasting

confidence: 47%

“…Lucerne and red clover nitrogen are generally degraded more extensively in the rumen than grasses [45], but the distribution of morphological components is not the same and these legumes are degraded differently in the rumen. The fraction 'a', degradation rate, and the undegradable fraction were higher for lucerne than for red clover [14]. These authors suggest that the undegradable fraction was considerably larger for lucerne than for red clover due to the heavy lignification of the stem tissue in lucerne.…”

Section: Discussionmentioning

confidence: 61%

“…The digestibility of the initial growth of red clover decreased with advancing maturity in an approximately linear fashion; this is typically related to the declining leaf:stem ratio [20,49]. The digestibility of red clover was lower than that of perennial ryegrass [14], but the rate of decline with age and the consequent stemminess were similar [17]. The reduction in digestibility was related to the increase in the cell-wall constituents [47].…”

Section: Discussionmentioning

confidence: 99%

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Protein degradation in the rumen of red clover forage at various stages of growth and conserved as silage or wrapped big bales

2002

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-In order to study the extent to which rumen soluble nitrogen can contribute to the intestinal flow, a study was carried out to simultaneously assess the dynamics of protein disappearance from dacron bags placed in the rumen and the amount of various N products in the rumen fluid (total nitrogen (tN), ammonia nitrogen (NH3-N), non-ammonia nitrogen (NAN)). The measurements were carried out on 4 sheep fed successively various red clover forages. These forages included the initial growth of fresh red clover (50% bud, first flower, and full flower). In addition, one silage and one wrapped big bale at the first flower stage and two wrapped big bales (harvested at 51% and 71% dry matter) at the full flower stage were given. The effective degradability of nitrogen (DegN) for a fresh forage estimated from the nylon bag procedure did not vary (p > 0.05) with the vegetation stage (0.727 for the bud stage, 0.694 at the first flower, 0.706 at the full flower). The DegN of the silage was higher (p < 0.05; 0.735) and the DegN of the wrapped big bale was markedly lower (p < 0.05; 0.660), than the original fresh forage at the first flower. The DegN of the wrapped big bales made at 51 and 71% DM, respectively, were 0.625 and 0.604 against 0.706 for fresh forage at the full flower stage. The concentrations of tN and NAN in the rumen fluid were low, highest 1 h to 2 h after feeding, and then decreasing up to 7 h after feeding whatever the growth stage and conservation mode. A part of the solubilised nitrogen remained as protein 1 h after feeding for fresh red clover harvested at various growth stages, while minimal protein could be seen in the rumen fluid after the sheep were fed silage or wrapped big bales. The part of NAN escaping rumen degradation and transiting with the rumen fluid was between 7 and 13% of the nitrogen disappearing from the nylon bags (NAN/CP D egN) placed in the rumen. There was only a small difference for forages at different stages of growth, or modes of conservation. This fraction was higher for wrapped big bales and particularly for the late stage forage (wrapped big bale, 71% DM, harvested at the full flower stage). red clover / vegetation stage / conservation method / protein degradation / rumen fluid composition Reprod. Nutr. Dev. 42 (2002) [559][560][561][562][563][564][565][566][567][568][569][570][571][572] 559

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Section: Discussioncontrasting

confidence: 47%

Section: Discussionmentioning

confidence: 61%

Section: Discussionmentioning

confidence: 99%

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Protein degradation in the rumen of red clover forage at various stages of growth and conserved as silage or wrapped big bales

2002

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“…El valor determinado de degradabilidad potencial de la alfalfa (Figura 1 y Cuadro 2), puede ser explicado por la alta digestibilidad de las uniones de los ácidos ferúlico y p-cumárico en la pared celular, los cuales después de 72 horas de incubación en el rumen presentan un 89% y 82% de digestión en el rumen, respectivamente, indicando una más fácil digestión de la fibra por los microorganismos (Cao et al, 2016 Un valor de degradabilidad efectiva de 41% ha sido reportado en heno de alfalfa cosechada a la mitad de la floración con tasas de paso de 6%/h (Trujillo et al, 2010), lo cual es considerablemente menor a lo determinado en las muestras analizadas (Cuadro 2), además de esa diferencia en la degradabilidad efectiva, Coblentz et al (1998) consideran inapropiada la asignación de una tasa de pasaje fija a los forrajes para estimar la degradabilidad efectiva, razón por la cual, ambas estimaciones podrían estar sesgadas.…”

Section: Resultados Y Discusiónunclassified

Degradabilidad ruminal de la alfalfa en la zona oriental del Valle Central de Costa Rica

Figueroa

Chacón-Hernández

2017

Mesoam. Agron.

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The objective of this work was to evaluate in dairy cows, the potential of ruminal degradability of four alfalfa (Medicago sativa) varieties developed in Argentina. The research was carried out in the Alfredo Volio Mata Experimental Station, located in the province of Cartago, Costa Rica; the area has a mean temperature of 17.9°C; a height of 1542 masl, and 1465.9 mm of rain evenly distributed between the months of May and November. Sampling was performed during 2014’s rainy season with ground level harvest of alfalfa, with samples of the varieties of Mora, Patricia, Victoria and Super Monarca, with harvest age of 28, 35, 42, 49, 56 and 63 days; all samples were dried, minced and incubated by duplicate on two Jersey-Reyna ruminally fistulated cows, for 0, 3, 6, 12, 24 and 48 hours. The results were analyzed through the Marquardt algorithm with the SAS software. Statical differences were only found between soluble fraction and degradation rate (p<0.05) according to harvest ages, with values of soluble, potentially degradable and degradation rate of 35.34%-44.65%, 36.46%-39.96% and 0.0734/h-0.1176/h, respectively. Likewise, effective degradability percentages of 59.06%-67.09%, with passage rates of 6%/h, according to harvest ages were obtained. Given the obtained results, the analyzed varieties of M. sativa showed a digestible forage, which could be used for the feeding of highly production animals.

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“…The quality of red clover protein was affected by ensiling, as the levels of all essential amino acids except Cys and Met were reduced. Arrigo (2006) showed that the levels of amino acids in roughage fell during preservation and storage, and herbage conservation reduced these levels (Coblentz et al, 1998). The amino acid profile attained during ensiling depends on the proteolytic potential of the ensiled plant (as reflected by protease and polyphenol oxidase activities), the tannin content, and the rates of wilting and acidification during ensiling.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Nutritive Value and Identification of Fungi in Silage from New Kenaf (Hibiscus cannabinus) Cultivars

Ryu¹,

Kwon²,

Ahn³

et al. 2016

IJAB

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The effects of harvesting stage of new Kenaf cultivars on the nutritive values, amino acid contents and fungal abundance were investigated. The late and mid-late maturing cultivars offered more DM than did early-maturing cultivars. The DM was highest at 100 DAS in all Kenaf silage. For all cultivars, the crude protein content (7.4-18.4%) of silage was reduced if harvesting was delayed. The neutral detergent fiber (NDF) and acid detergent fiber (ADF) contents were not significantly different among the cultivars; however NDF and ADF contents increased significantly upon late harvesting. All silages had pH values under 4.0, ensuring stable storage. The optimum harvesting time for silage production, as evidenced by yield, fermentation characteristics and nutritive value, was 100 DAS. The concentrations of amino acid in the silage were lower than that in the hay. Silage produced by all Kenaf cultivars exhibited low yeast biodiversity; only one species (Pichia fermentans) was detected when the harvesting date was optimal.

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In Situ Dry Matter, Nitrogen, and Fiber Degradation of Alfalfa, Red Clover, and Eastern Gamagrass at Four Maturities

Cited by 80 publications

References 34 publications

Protein degradation in the rumen of red clover forage at various stages of growth and conserved as silage or wrapped big bales

Protein degradation in the rumen of red clover forage at various stages of growth and conserved as silage or wrapped big bales

Degradabilidad ruminal de la alfalfa en la zona oriental del Valle Central de Costa Rica

Evaluation of Nutritive Value and Identification of Fungi in Silage from New Kenaf (Hibiscus cannabinus) Cultivars

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