Cultivo de couve manteiga com substratos orgânicos e mineral

Abstract

The production of collard greens (Brassica oleracea L.) is a challenge in agriculture, considering the use of different types of substrates, such as; cattle manure, chicken litter, manipueira and NPK. The objective of this work was to evaluate the initial development of leaf production of collard greens by comparing nine study variables. The experiment was installed in a greenhouse at the Federal University of Western Pará (UFOPA), University Campus of Juruti. The experiment was set up in a completely randomized design (CDR) with 5 treatments and 6 replications, with T1= (Control-Soil), T2 (soil and cattle manure); T3 (soil and poultry litter); T4 (soil and manipueira); T5 (soil and NPK 10-10-10). Collard greens seeds were purchased from local businesses and sown in plastic seedbeds and finally planted in 3.7L pots. The variables measured were: plant height (cm), number of leaves (units), leaf length (cm), number of leaves harvested (units), weight of fresh leaves (g), dry weight of leaves (g), weight of the stem (g), diameter of the collar of the plant (mm), weight of the roots (g). The results demonstrate that cattle manure followed by chicken litter and NPK have satisfactory results in the production of collard greens leaves. Manipueira and control had a considerable result for some indicators such as number of leaves and plant height, but this did not represent significance in the production of leaves per se.