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Dwarf and Tall Elephantgrass Genotypes under Irrigation as Forage Sources for Ruminants: Herbage Accumulation and
Rayanne Thalita de Almeida Souza1, Mércia Virginia Ferreira Dos Santos1, Márcio Vieira da Cunha1
1Department of Animal Science, Federal Rural University of Pernambuco, Dom Manoel de Medeiro Street, Dois Irmãos, Recife, Pernambuco 52171-900, Brazil.
Dwarf *Pennisetum purpureum* genotypes show higher nutritive value and promise for irrigation, especially during dry periods. Irrigation improved leaf carbohydrate content and dry matter accumulation rates.
Area of Science:
- Agronomy
- Plant Science
- Animal Nutrition
Background:
- *Pennisetum purpureum* (elephant grass) is a vital forage crop.
- Understanding genotype performance under varying water conditions is crucial for optimizing forage production.
Purpose of the Study:
- Evaluate *Pennisetum purpureum* genotypes for forage yield and quality.
- Assess the impact of rainfed vs. irrigated conditions and seasonal variations on forage characteristics.
Main Methods:
- Two-year field study comparing tall and dwarf *Pennisetum purpureum* genotypes.
- Evaluated herbage, leaf, and stem dry matter accumulation, nutritive value, and carbohydrate/protein fractions.
- Contrasted rainfed and irrigated conditions during dry and rainy seasons.
Main Results:
- Dwarf genotypes generally exhibited superior nutritive value compared to tall ones.
- Irrigation increased leaf carbohydrate C fraction and fiber deposition.
- Herbage accumulation rates varied by genotype and season, with some dwarf types performing comparably to tall ones during the rainy season.
Conclusions:
- Dwarf *Pennisetum purpureum* genotypes offer greater nutritive value and potential for forage production, particularly under irrigation.
- Irrigated conditions enhance forage quality and yield, suggesting suitability for filling dry-period forage gaps.
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