Resumo

BUGARIN, J et al. BEHAVIOR OF SOME PHYSICAL AND CHEMICAL PROPERTIES OF DIFFERENT SOIL WITH THE PLAIN silvopasture systems in northern Nayarit. cultrop [online]. 2010, vol.31, n.2, pp. 00-00. ISSN 0258-5936.

A silvopastoral system was established on a 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

Palavras-chave : agrosilvopastoral systems; legumes; soil chemicophysical properties; soil compaction; soil improvement.

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