Offered Papers Theme A: Efficient Production from Grassland
Description
Most of the Brazilian cultivated pasture fields presents soils with high Al+3 levels and liming is economically unfeasible. So, there is an urgent need for grasses with good forage yielding potentials that can withstand Al+3 deleterious effects (abnormal root development: short, thick and poorly branched roots, which are unable to effectively translocate water and essential nutrients to the leaves) (Foy, 1984); as a consequence, susceptible genetic materials have their field persistences greatly affected, mainly during drought periods. Researches on Al+3 reaction are usually compare supposedly resistant/tolerant genotypes with a resistant control check; doing so, the genotypic effect is not isolated, making unreliable the comparisons made (Thomas & Lapointe, 1989). Guineagrass hybrids were tested as to nutrient translocations to the leaves, through comparisons of results obtained in treatments with and without N, P and K applications to the soil, for each genotype.
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Differential Behaviour of Guineagrass (Panicum Maximum Jacq.) Hybrids, With Different Al+3 Reactions, as to Major Nutrient Translocations to the Leaves
Most of the Brazilian cultivated pasture fields presents soils with high Al+3 levels and liming is economically unfeasible. So, there is an urgent need for grasses with good forage yielding potentials that can withstand Al+3 deleterious effects (abnormal root development: short, thick and poorly branched roots, which are unable to effectively translocate water and essential nutrients to the leaves) (Foy, 1984); as a consequence, susceptible genetic materials have their field persistences greatly affected, mainly during drought periods. Researches on Al+3 reaction are usually compare supposedly resistant/tolerant genotypes with a resistant control check; doing so, the genotypic effect is not isolated, making unreliable the comparisons made (Thomas & Lapointe, 1989). Guineagrass hybrids were tested as to nutrient translocations to the leaves, through comparisons of results obtained in treatments with and without N, P and K applications to the soil, for each genotype.
