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Ciência Rural

Print version ISSN 0103-8478On-line version ISSN 1678-4596


BANDINELLI, Duilio Guerra et al. Botanical composition of natural pasture as afected by phosphorus sources, lime and introduction of winter forage species. Cienc. Rural [online]. 2005, vol.35, n.1, pp.84-91. ISSN 0103-8478.

Natural pastures of Rio Grande do Sul State, South of Brazil, have low forage productivity in the autumn-winter. An alternative to improve systems based on these pastures is introduction of winter forage species, fertilization and liming of soil. The present work had the objective of evaluating the effect of phosphorus sources, lime and introduction of winter forage species in the pasture botanical composition dynamics. The treatments used were: T1 - simple superphosphate + lime + winter forage species introduction; T2 - triple superphosphate + lime + winter forage species introduction; T3 - triple superphosphate + winter forage species introduction; T4 - Gafsa rock phosphate + winter forage species introduction; T5 - winter forage species introduction without phosphorus and lime; T6 - reference only with natural pasture. To evaluate the botanical composition dynamics, periodic botanical evaluations were done during twenty two months, using BOTANAL method. The results showed that treatments did not modify the botanical composition of natural pasture during the evaluation period.

Keywords : botanical composition; natural pasture; phosphorus; lime; improvement.

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