GROWTH RESPONSE OF Bauhinia Variegata L. TO INOCULATION AND ORGANIC FERTILIZATION

Abstract

The objective of this work was to evaluate the initial growth of Bauhinia variegata L. when inoculated and fertilized with different proportions of organic compost. The experiment was performed in greenhouse in a completely random factorial (2 x 5) + 1 design, with 9 replicates, constituted by the presence or absence of inoculation, five proportions of organic compost:soil (0:100, 20:40, 40:60, 60:40 and 80:20; v/v) and one additional treatment with chemical fertilization without inoculation. Ninety days after sowing, the plant height, stem diameter, number of leaves, radicular length, dry mass of the aerial portion, dry mass of roots, total dry mass, Dicksosn's quality index (IQD), contents of nitrogen and carbon and the C/N ratio of the dry mass of the aerial portion, were evaluated. The inoculation with diazotrophic bacteria stimulated growth in height, stem height/diameter ratio, dry mass of the aerial portion, dry mass of roots, total dry mass and the foliar contents of nitrogen and carbon in seedlings of B. variegata L. Seedlings grown using organic compost showed better development when compared to seedlings grown only in soil with or without chemical fertilization. Seedlings grown with formulated substrate at a proportion of 16:84 (organic compost:soil + inoculation) exhibited higher IQD, therefore, this constitutes the recommended proportion for production of B.variegata L. seedlings.

SEED EMERGENCE AND DEVELOPMENT OF Caesalpinia pulcherrima L. SW. AND Cassia grandis L. F. IN ORGANIC SUBSTRATES

“…Depending on the chemical and physical characteristics of the organic residues used to constitute a substrate, these may increase the contents of available macro and micro nutrients (Moreira et al, 2018;Braulio et al, 2019;Moreira et al, 2021), increase the values of pH in the substrate, reduce aluminum saturation, reduce substrate density, increase aeration (Delarmina et al, 2013), increase macro-porosity and total volume of pores (Delarmina et al, 2014), and promote the increase of water retention in the substrate, as verified.…”

“…In order to select cultivation substrates one must consider its efficiency by supplying favorable conditions for plant growth such as water availability, aeration, balanced pH, adequate salinity, besides the capacity to supply nutrients. Organic residues, when added in adequate proportions to formulate substrates with soil, render positive results on germination and growth of seedlings by providing benefits to the physical and chemical attributes of the soil (Moreira et al, 2018;Braulio et al, 2019;Moreira et al, 2021). Among these residues are the sewage sludge (Delarmelina et al, 2013), urban waste compost (Silva et al, 2014) and cattle manure compost Braulio et al, 2019;Moreira et al, 2021).…”

“…Organic residues, when added in adequate proportions to formulate substrates with soil, render positive results on germination and growth of seedlings by providing benefits to the physical and chemical attributes of the soil (Moreira et al, 2018;Braulio et al, 2019;Moreira et al, 2021). Among these residues are the sewage sludge (Delarmelina et al, 2013), urban waste compost (Silva et al, 2014) and cattle manure compost Braulio et al, 2019;Moreira et al, 2021).…”