Behavior of some soil physico-chemical properties with different silvopastoral system in the northern plain of Nayarit
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Abstract
haplic (eutric, cromic) Cambisol in the northern coastal plain of
Nayarit. The application of silvopastoral system for ovine
production was evaluated and its impact on soil properties.
Treatments were Leucaena leucocephala+Brachiaria
brizantha (T1), L. glauca+B. brizantha (T2), L. leucocephala
+Clitoria ternatea+B. brizantha (T3), L. glauca+
C. ternatea+B. brizantha (T4) and B. brizantha (T5), arranged
in randomized blocks with four repetitions of 256 m2 each. The
experiment was settled in October, 2007 with irrigation and
without fertilizers, according to the season. The soil was
characterized at the beginning and its physicochemical
properties were determined. In the upper 20 cm, bulk density
was 1.33 Mg.m-3, moisture 12.83 %, pH 6.3 and low organic
matter content (1.68 %). Five evaluations were performed for
bulk density, pH and organic matter content; samples were
taken with vegetation cover and without it, regarding the
treatments. The main results indicate a bulk density increment
and no statistical differences among treatments when finishing
the evaluation; pH increased towards more neutral values and
also organic matter content, in which arboreous and herbaceous
leguminous were mostly employed, as well as pasture (LGCB
treatment); arboreous leguminous disappeared at the end of
the experiment, so that it had a negative influence on the results.
The use of silvopastoral systems is recommended as a
mechanism to decrease soil degradation, considering the
characteristics of the species to be established and the land.
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