Sources and splitting of the organic fertilization in top dressing in the production of cabbage

Resumo

Although there is research with fertilization in top dressing in the production of cabbage, these are usually made with inorganic fertilizers, being rare the researches with organic fertilization in top dressing in the production of most of vegetables. The objective of this work was to evaluate the effect of different splitting of two organic fertilizers in top dressing in the production of cabbage. Six treatments were evaluated, with four replications in the randomized block design. The six treatments were the result of the factorial 3 x 2, with three types of splitting (1/3+1/3+1/3; 4/6+1/6+1/6; 1/6+4/6+1/6 of the total dose in each application) and two organic fertilizers (castor bean cake and organic compost). The total dose of each fertilizer was calculated to apply 120 kg ha^-1 of N. The characteristics evaluated were: number of external leaves, fresh weight of external leaves, fresh and dry weight of the head, head diameter and height and cycle. Fertilization with castor bean cake resulted the production of heads with higher weight, diameter and height in relation to the organic compost, besides reducing the cycle. The 4/6+1/6+1/6 splitting was better than the 1/6+4/6+1/6 splitting for the castor bean cake.