Artículo
Abstract:
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.] Barkw. & Dewey), tall fescue (Festuca arundinacea Schreb.), and salt grass (Distichlis scoparia L.). Then, we quantified the percentage of fragments with the blade epidermal feature for each species, evaluating whether they varied with plant maturity. We also evaluated whether those percentages were affected by digestion to determine if the procedure we propose could be used in diet analysis. Finally, by linear regression, we analyzed whether the relationships between the actual blade dry mass percentages (y) and those estimated by microanalysis (x) were 1:1 in mixes of different plant parts of the individual species as well as in mixed vegetation samples. Digestion affected the percentage of identifiable blade fragments of each species; but, after correction by digestion, all the estimates were accurate (a = 0 and b = 1 in all the regression equations) and precise (r 2 > 0.90). Results indicate that epidermal features specific to blades would make it possible to estimate by microanalysis the percentage of this plant part for each species in vegetation samples from pastures composed of few species and also in the diets of herbivores grazing them. Although the proposed procedure was tested in simple systems, it could also be used to estimate the percentage of blades of the dominant species in the diets of herbivores grazing more complex systems.
Registro:
| Documento: | Artículo |
| Título: | Microhistological estimation of grass leaf blade percentages in pastures and diets |
| Autor: | Sierra, P.V.; Cid, M.S.; Brizuela, M.A.; Ferri, C.M. |
| Filiación: | Facultad de Ciencias Exactas Y Naturales, Universidad National de Mar del Plata (UNMdP), cc 276, (7620) Balcarce, Buenos Aires, Argentina Consejo National de Investigaciones Cientificas Y Técnicas (CONICET), cc 276, (7620) Balcarce, Buenos Aires, Argentina Facultad de Ciencias Agrarias, UNMdP, Argentina CONICET, Argentina Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC), Argentina Facultad de Agronomía, Universidad National de la Pampa, Argentina Departamento de Producción Animal, Facultad de Ciencias Agrarias, UNMdP, cc 276, (7620) Balcarce, Buenos Aires, Argentina |
| Idioma: | Inglés |
| Palabras clave: | Bulliform cells; Kleingrass; Prickle hairs; Salt grass; Tall fescue; Tall wheatgrass; herbivore; leaf; pasture; Distichlis scoparia; Panicum coloratum; Poaceae; Schedonorus arundinaceus; Scoparia; Thinopyrum elongatum; Thinopyrum ponticum |
| Año: | 2005 |
| Volumen: | 58 |
| Número: | 2 |
| Página de inicio: | 207 |
| Página de fin: | 214 |
| DOI: | http://dx.doi.org/10.2111/1551-5028(2005)58<207:MEOGLB>2.0.CO;2 |
| Título revista: | Rangeland Ecology and Management |
| Título revista abreviado: | Rangeland Ecol. Manage. |
| ISSN: | 15507424 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507424_v58_n2_p207_Sierra |
Referencias:
- Arnold, G.W., Selective grazing by sheep of two forage species at different stages of growth (1960) Australian Journal of Agricultural Research, 11, pp. 1026-1033
- Chacon, E.A., Stobbs, T.H., Influence of progressive defoliation of a grass sward in the eating behaviour of cattle (1976) Australian Journal of Agricultural Research, 27, pp. 709-727
- Cid, M.S., Brizuela, M.A., Grass blade and sheath quantification by microhistological analysis (1990) The Journal of Wildlife Management, 54, pp. 349-352
- Del Pozo, M., Wright, I.A., Whyte, T.K., Diet selection by sheep and goats and sward composition changes in a ryegrass/white clover sward previously grazed by cattle, sheep or goats (1997) Grass and Forage Science, 52, pp. 278-290
- Holechek, J.L., Gross, B., Training needed for quantifying simulated diets from fragmented range plants (1982) Rangeland Ecology & Management, 35, pp. 644-647
- Holechek, J.L., Vavra, M., Pieper, R.D., Methods for determining the botanical composition, similarity and overlap of range herbivore diets (1984) Developing Strategies for Grassland Management, pp. 25-471. , National Research Council/National Academy of Sciences [eds.]. Boulder, CO: Westview Press
- Johnson, M., Wofford, H., Digestion and fragmentation: Influence on herbivore diet analysis (1983) The Journal of Wildlife Management, 47, pp. 877-879
- Leislie, D.M., Martin, J.R., Starkey, E.E., Slater, R.C., Correcting for differential digestibility in microhistological analysis involving common coastal plants of the Pacific Northwest (1983) Rangeland Ecology & Management, 36, pp. 730-732
- L'Huillier, P.J., Poppi, D.P., Fraser, T.J., Influence of structure and composition of ryegrass and prairie grass-white clover swards on the grazed horizon and diet harvested by sheep (1986) Grass and Forage Science, 41, pp. 259-267
- Metcalfe, C.R., (1960) Anatomy of Monocotyledons. I. Gramineae, pp. XV-XXXVI. , Oxford: Claredon Press
- Norton, B.W., Limitations caused by chemical composition and digestibility (1984) Nutritional Limits to Animal Production from Pastures, pp. 87-110. , J. B. Hacker [ed.], Farnham Royal, UK: Commonwealth Agricultural Bureaux
- Pratt, H., L'epiderme des graminées. Etude anatomique et systématique (1930) Annales des Sciences Naturalles-Botanique-Series, 10 (14), pp. 117-324
- Salisbury, F.B., Ross, C.W., (1978) Plant Physiology. 2nd Ed., 422p. , Belmont, CA: Wadsworth Publishing Co
- Smart, A.J., Schacht, W.H., Pedersen, J.F., Undersander, D.J., Moser, L.E., Prediction of leaf:stem ratio in grasses using near infrared reflectance spectroscopy (1998) Rangeland Ecology & Management, 51, pp. 447-479
- Sparks, D.R., Malechek, J.C., Estimating percentages dry weight in diets using a microscope technique (1968) Rangeland Ecology & Management, 21, pp. 264-265
- Tilley, J.M.A., Terry, R.A., A 2 stage technique for the in vitro digestion of forage crop (1963) Journal of the British Grassland Society, 18, pp. 104-111
- Vavra, M., Holechek, J.L., Factors influencing microhistological analysis of herbivore diets (1980) Rangeland Ecology & Management, 35, pp. 372-374
- Wilson, J.R., Variation on leaf characteristics with level of insertion on a grass tiller. I. Development rate, chemical composition and dry matter digestibility (1976) Australian Journal of Agricultural Research, 27, pp. 343-354
Citas:
---------- APA ----------
Sierra, P.V., Cid, M.S., Brizuela, M.A. & Ferri, C.M. (2005) . Microhistological estimation of grass leaf blade percentages in pastures and diets. Rangeland Ecology and Management, 58(2), 207-214.http://dx.doi.org/10.2111/1551-5028(2005)58<207:MEOGLB>2.0.CO;2
---------- CHICAGO ----------
Sierra, P.V., Cid, M.S., Brizuela, M.A., Ferri, C.M. "Microhistological estimation of grass leaf blade percentages in pastures and diets" . Rangeland Ecology and Management 58, no. 2 (2005) : 207-214.http://dx.doi.org/10.2111/1551-5028(2005)58<207:MEOGLB>2.0.CO;2
---------- MLA ----------
Sierra, P.V., Cid, M.S., Brizuela, M.A., Ferri, C.M. "Microhistological estimation of grass leaf blade percentages in pastures and diets" . Rangeland Ecology and Management, vol. 58, no. 2, 2005, pp. 207-214.http://dx.doi.org/10.2111/1551-5028(2005)58<207:MEOGLB>2.0.CO;2
---------- VANCOUVER ----------
Sierra, P.V., Cid, M.S., Brizuela, M.A., Ferri, C.M. Microhistological estimation of grass leaf blade percentages in pastures and diets. Rangeland Ecol. Manage. 2005;58(2):207-214.http://dx.doi.org/10.2111/1551-5028(2005)58<207:MEOGLB>2.0.CO;2
