Dry matter yield of promising Panicum maximum genotypes in response to phosphorus and liming on Brazilian savannah

摘要

Soil fertility of the Brazilian savannah Ccrrado is naturally poor. Extensive areas of pastures located in the central part of territory arc cultivated with Brachiaria grasses which arc less demanding for soil nutrients and lime (Rao et al. 1998). Onthe other hand, Panicum maximum cultivars such as the high yielding Mombaca grass recommended to intensive beef and dairy cattle systems (Euclidcs et al. 2008), must be seeded with a higher amount of fertilizer, especially phosphorus (P). Consequently there is an effort for selection of P. maximum genotypes with low P demand and high responsiveness. The objective of this study was to evaluate dry matter yield of genotypes of P. maximum in response to doses of P and lime in the Brazilian Ccrrado.