Estudio comparativo entre el cultivo convencional y ecológico de trigo para alimentación animal

1. Mateos, I. ¹
2. Ranilla, M.J. ¹
3. Saro, C. ¹
4. Palacios, C. ²
5. Díaz, A. ¹
6. Tejido, M.L ¹
7. Carro, M.D. ³

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More publications in: Anales de la Real Academia de Ciencias Veterinarias de Andalucía Oriental

Abstract

The objective of this study was to assess the differences in yield and nutritive value of organically and conventionally grown wheat crops as animal feeds. Forage yield was determined in May in three consecutive years and straw and grain yield was determined in July in the two first years. Samples were dried to determine their chemical composition and in vitro digestibility. Additionally, 500 mg of each sample were incubated with 50 mL of buffered rumen fluid at 39°C to estimate rumen fermentation kinetics and fermentation parameters after 24 hours. Forage, grain and straw yield was greater in conventionally grown crops than in organic ones. Crude protein content was lower in organically grown wheat, both for the forage or the grain. In vitro digestibility was similar in both types of cultures and there were no differences in degradation kinetics parameters or volatile fatty acids production. Results indicate that organic cultivation lead to a decrease in yield and crude protein content in forage and wheat grain, but there were no differences in their ruminal degradation. These results indicate that cultivation system affects chemical composition of wheat and, therefore, it is necessary to assess the nutritive value of organically grown cereals intended for animal feeding.

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