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Abstract
The breeding of ovine and caprine possess high partner-econo-mic importance in the Northeast, however, the low genetic potential of the
herds, as well as the scarcity of pastures during the dry season, limits the
productivity and lucrativeness indices to a low level. The use of cultivated
pastures is a way to maintain in high level the carrying capacity of the
pasture over the year. This work was conducted with the aim of increase
the productivity, expand the income and stimulate the producer to invest
in new productive techniques. 100 Sem Raça Definida sheep and three
periods were used. The rest period consisted of: treatment 1 - time for
expansion of 1.5 new leaves per tiller; treatment 2 - time for expansion of
2.5 new leaves per tiller and treatment 3 - time for expansion of 3.5 new
leaves per tiller. The analysis considered the use of 1, 3 or 5 hectares of
pasture, fenced by campestre screen or electric fence. The efficiency indices
adopted were: benefit cost relation, liquid present value, return internal
tax, and sensitivity analysis. The 2.5 leaves rest period exploring at least
5.0 hectares presented best performance, in terms economics, biological
and environmental. So, to promote economic return, it is necessary to use
sheep of higher genetic potential and pastures areas above 5.0 hectares.