Meadow management, hay yields and nutritive value in the Mediterranean mountain regions of the Northeast of Portugal | Gestion de la production des foins de prairie et de la valeur nutritive dans les montagnes du Nord-Est de Portugal
2005
Pires, J.M.(Mountain Research Center, Escola Superior Agrária de Bragança, 5300 Bragança, PortugalBernardo, A.) | Pires, J. | Moreira, N.
To evaluate the possibility of improving hay nutritive value, six hay meadows were studied in the Northeast of Portugal from 1998 to 2000. The treatments were fertilization rates of 0, 75 and 150 kg N/ha/y in combination with two cutting/grazing regimes: the usual for the area (NG) and a larger spring grazing period with meadows closed off for hay three weeks later (LG). Their effects on crude protein content, in vitro organic matter digestibility, and dry-matter, crude protein and metabolizable energy yields were evaluated. Late spring grazing induced the greatest changes in the highest yielding meadows (M3 and M5) increasing nutritive values but decreasing the DM yield (-2t DM/ha, +1
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