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Universidade Federal do Ceará (2008)

Curva de desidratação e degradação in situ do feno de forrageiras nativas da caatinga cearense

Araújo Filho Jaime Miguel de

Titre : Curva de desidratação e degradação in situ do feno de forrageiras nativas da caatinga cearense

Curve of dehydration and degradation in situ of hay of native forages of caatinga pertaining to the state of Ceará

Auteur : Araújo Filho, Jaime Miguel de

Université de soutenance : Universidade Federal do Ceará

Grade : Mestre em Zootecnia 2008

The study of the nutritional value of forage native of caatinga is crucial for the sustainability of production systems in semi-arid, highlighting the potential of forage species. With the realization of this study aimed to estimate the time of dehydration and nutritive value of hay, marmeleiro (Croton sonderianus Muell.Arg.), mata-pasto (Senna obtusifolia), mororó (Bauhinia cheilantha Bong.) e sabiá (Mimosa caesalpiniifolia Benth) by determining the chemical composition and behavior of rumen degradation in situ. The preparation of hay was held at the Curú Valley Experimental Farm, the chemical analysis in the laboratory of Animal Nutrition of the UFC and testing of degradation in situ, at Division of Caprinovinocultura of the Center for Health and Technology Rural - CHTR, UFCG. To determine the curve of dehydration of hay samples were collected in the time 0, 4, 20 and 24 hours for the quince, 0, 2, 4, 6, 8, 22,24 and 26 hours for the mata-pasto, 0, 2, 4 and 6 hours for the mororó and 0, 4, 6, 22 and 26 hours for the sabiá, following design entirely randomized, where each time is a treatment, with three repetitions for each sample collected in different times of specific dehydration for each species. For the degradation in situ was performed the technique of bags of nylon, with incubation of the samples in the rumen four of male goats with about 30 kg of weight , castrated, fistulated and canulados, kept in individual boxes.Was estimated the degradation of PB, MS and FDN at 0, 6, 12, 24, 48, 72 and 96 hours of hatching. During the process of dehydration there was no change in the percentage of PB and EE for hays assessed, however, was observed a reduction in the percentage of MM for the hay mata-pasto and reduction of the FDN and FDA for the four species during the process of haymaking. The total time of dehydration of hay was 24, 26, 6 and 26 hours for the marmeleiro, mata-pasto, mororó and sabiá, respectively, with no depreciation of the quality of the material during the haymaking. Considering the degradation rumen was observed influence of phenological stage of matá-pasto for the fractions "a" and "I", degradability potential (DP) and effective (DE) at 2, 5 and 8%/h and fractions of MS "b" and "I" and potential degradability and effective at 2%/h of the FDN. The hay of mata-pasto show higher for values DP and DE of what the other hays studied. However, the Sabiá and mororó showed good degradability effective of PB with 39.91 and 42.67% respectively. The hay of marmeleiro presented lowest values for DE, of what the other hays studied. The total tannins percentage demonstrated inhibitory effect degradation hay of marmeleiro, mororó and sabiá, however, the influence phenolic compounds in the degradation of the principles nutritious of fodder native requires evaluation of techniques more sensitive. According to the chemical composition and kinetic of rumen, the forage species studied can be exploited in the form of hay in the diet of small ruminants.

Assunto(s) : Valor nutritivo, Conservação e semi-árido, Nutritional value, Conservation and semi-arid


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Page publiée le 23 mars 2011, mise à jour le 12 mars 2019