Uso de diferentes substratos na produção de mudas de Mandacaru Cereus Jamacaru D.C

Abstract

In large-scale seedling production systems, the search for the best substrate has always been one of the greatest challenges. The pure elements or compositions must always support good development and sanity of seedlings by the cohesion of clods, drainage, nutrition, aeration among other factors. All this combined with the best cost / benefit ratio. The production of Mandacaru seedlings Cereus jamacaru DC by sexual propagation has been configured as a goal in many nurseries located within the Brazilian Semi-arid and Caatinga Biome due to the need to maintain genetic variation and because seedlings from seeds develop, many times, much faster than those caused by asexual propagation. This causes areas repopulated by these seedlings to provide environmental services such as foraging for native and domestic species more quickly. In an experiment carried out in the Agroecology Module / UFPB / CCA / DFCA / STA where tested ten substrates represented by Pure Compound; Compound + Solo 1: 1; Compound + Solo 2: 1; Pure Solo; Solo + Compound 2: 1; Pure Wash Sand; Washed Sand + Solo 1: 1; Washed Sand + Solo 2: 1; Sand Washed + Composite 1: 1 and Sand Washed + Composite 2: 1 and observed the variables survival, height, diameter in the median section, root length and dry weight of roots of seedlings, it was verified that at 360 days after sowing the highest values of survival form measured by Compound + Solo 1: 1; Pure Solo; Sand + Compound 2: 1 or Sand + 1: 1 Compound. The highest values for shoot were recorded for Pure Compound or Compound + Solo 1: 1. As for the root system, one can choose Sand + Composite 1: 1 and Sand + Soil 2: 1 or Soil + 2: 1 Compound. However, the Soil + Compound 2: 1 mixture, because it contains a higher soil value and does not require as much source of organic matter besides having a higher value of root mass, and because it presents significant values of survival, height and seedling diameters may be the most recommended in a scale production system.