SciELO - Scientific Electronic Library Online

vol.64 issue3Correlation among the Colletotrichum spp. incidence with some coffee agronomic traitsEffects of desiccation on the physiological potential and sanitary condition of seeds from soybean plants author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links



Print version ISSN 0006-8705On-line version ISSN 1678-4499


NAKAGAWA, João  and  ROSOLEM, Ciro Antonio. Nutrient concentration in leaves and grains of black oat affected by phosphorus and potassium fertilization. Bragantia [online]. 2005, vol.64, n.3, pp.441-445. ISSN 0006-8705.

Black oat is a rustic gramineae, with low requirements, mainly cultivated as winter forage and green manure in crop rotation systems. In spite of its importance, there are only few studies evaluating the effects of fertilization on nutrient content in their leaves and grains. The objective of this work was to study the effects of P and K fertilization on the concentration of macro and micronutrients in flag leaf and grains of black oat cv. Comum. An experiment was carried out under field conditions on a Rhodic Nitisol, in Botucatu, São Paulo State, Brazil. Three doses of P (0, 40 and 80 kg ha-1 of P2O5) and three doses of K (0, 20 and 40 kg ha-1 of K2O), in presence of 50 kg ha-1 of N (20 kg ha-1 applied at sowing and 30 kg ha-1 after tillering stage) were tested, in a factorial 3 x 3 randomized complete block design, with four replications. Macro and micronutrients concentration in flag leaves increased with phosphorus fertilization; 40 kg.ha-1 of P2O5 was sufficient to promote these positive results. Potassium fertilization affected only the concentration of K in the leaves. Nutrient concentration in grains were not affected by phosphorus or potassium fertilization.

Keywords : Avena strigosa; macronutrients; micronutrients; mineral nutrition.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License