Evaluation of elephant grass clones (Pennisetum purpureum Schum.) and an elephant grass x pearl millet (Pennisetum glaucum (L.) R. Br.) hybrid submitted to water stress. 2. Nutritive value

Barreto, G.P.; Lira, M. de A.; Santos, M.V.F. dos; Dubeux Junior, J.C.B.

Revista Brasileira de Zootecnia 30(1): 7-11

2001


ISSN/ISBN: 1516-3598
Accession: 003438352

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Abstract
The nutritive value of 3 elephant grass clones (Cameroon, Roxo de Botucatu and Mott) and an elephant grass with pearl millet hybrid (HV-214) cultivated under 2 different humidity conditions (with and without water stress) was studied. A randomized block design with split plots and 3 replicates was used. In the main plot, the effect of the humidity regimes was studied and in the split plot, the different clones. The dry matter (DM), crude protein (CP), neutral detergent fibre (NDF) content and in vitro dry matter disappearance (IVDMD) were analysed. The materials submitted to water stress showed a high dehydration level (more than 58% of DM), mainly in elephant grass cultivars. Plants submitted to water stress exhibited CP content (17.8%) that was significantly higher compared to those plants submitted to the water treatment (14.45%). However, among cultivars, only Cameroon (14.68% CP) differed from the others (16.46% PB). As for the NDF contents, difference among the 2 humidity regimes was not observed, but Mott and Cameroon cultivars showed higher contents (61.79%) in relation to those of Roxo de Botucatu cultivar and HV-241 hybrid (56.60%). The average IVDMD value was 53.07%. Difference in IVDMD among humidity regimes was not observed nor among the different clones.