ADUBAÃÃO COM NITROGÃNIO, FÃSFORO E POTÃSSIO PARA EXPERIMENTOS COM CAFEEIRO EM VASOS. / Fertilization of coffee plants in vase with nitrogen, phosphorus and potassium

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

This work aimed at to adentify the appropriate fertilizarion for coffee plants in its initial formation phase using vases. The initial amount of phosphorus in the soil was 100 mg dm3 and 400 mg dm3 for nitrogen and potassium. The experiment was perfomed at the Cofee Section of th e Agricultura Departament from the Federal Iniversity of Lavras, from june to December/2004. The parameters evaluated were plant height, stem diameter and number of pairs leaves. In the installation of the experiment was accomplished the first fertilization with N, P, K Ca, Mg, S, B, Cu, Mo, Zn, Mn and Fe. The experimental disig used was randomized blocks with four repetitions in factorial scheme 7x2. Seven levels of fertilization were used (0,,5:0,75; 1; 1,25; 1,5; 1,75; 2 times in relation to the NPK dose recommended by commissionâ (1999) and two soil types (clayev and sandy). Two plants per parcel were used in a total of 28 parcels. Fifty-six vases were used for the clayey soil and fifty-six for sandy soil. The results showed that cultivation of coffee plants in sandy soil using vases increased the negativw effct of the excess of fertilization. For Cultivation of coffee plants in vases the amount of 200 mg dm3 of phosphorus were insufficient for the development of the plants. The dose 200 mg dm3 of nitrogen and potassium were excessive and may affect the nutrition by calcium and magnesium, and consequently the develipment of the coffee plants.

ASSUNTO(S)

cafà coffee adubaÃÃo npk fitotecnia manuring npk

ACESSO AO ARTIGO

Documentos Relacionados