Propriedades físicas de substratos contendo fibra de bananeira e produção de mudas de mamoeiro

Abstract

The Northeast is the largest papaya producer in Brazil, with which is of great importance the formation of seedlings, using quality materials for the production of substrates that have physical and chemical characteristics ideals. The objective of this research was to evaluate the physical properties of substrates containing banana fiber and the production of papaya seedlings. The experiment was conducted in a greenhouse in randomized block design with four replications. The seven treatments consisted of substrate compositions consisting of soil in proportions of 42 to 100%, earthworm humus in proportions of 0 to 40% and fiber of the pseudostem of the banana 0 to 30%. The experimental unit consisted of five polyethylene bags with five seedlings. The physical properties of the substrates were evaluated, while in the seedlings were evaluated the emergency speed index, emergency, height and diameter of changes, relative growth rate in height and diameter leaf area, chlorophyll content, dry matter, and leaf contents of N, P and K. The results were submitted to analysis of variance and regression, appropriate for experiment with mixtures. The minimum values of dry and maximum density estimated for porosity total space aeration and minimum remaining water, the estimated maximum values for emergency speed index and percentage of emergency height, diameter stem and relative rate of growth in height of seedlings and as well as area leaf, dry weight of leaf, root, and all were obtained with 42% of vegetable earth, 30% of banana fiber and 28% earthworm humus.