Vegetative development of oregano (Plecthranthus amboinicus (Lour.) Spreng.) in three substrates at the nursery level using different bag sizes

Abstract

The present research addresses morphological aspects of the plant and evaluates the behavior of vegetative development of oregano (Plecthranthus amboinicus (Lour.) Spreng) through the establishment of stems at nursery level using a Randomized Complete Block design, over a period of 90 days. Each block was composed of 30 plants, with three replications for a total of six blocks with 180 plants. Three measurements were made at 30-day intervals. The variables were: survival, number of leaves, plant height, and leaf length and width. Three types of substrates were used; 1) 100 % soil, 2) a mixture of 35 % soil, 30 % sand, 30 % bokashi and 5 % lime, 3) 35 % soil, 35 % rice husk and 30 % sand. In the laboratory, the percentage of biomass in green and dry weight (root and aerial) was calculated to check the moisture content of the plant. The bokashi substrate presented the best results in terms of organic matter and nitrogen. Plant growth was better with the bokashi substrate when obtaining the highest values; in terms of stem survival, a general average of 64% was recorded, with no difference between the factors or in the interaction; in terms of the number of leaves, the bokashi substrate in large bag obtained 41 leaves, in length and width of the leaf, 6.07 cm and 5.32 cm were recorded respectively, and 32.46 cm in plant height, all these results obtained in the moisture content of the plants was higher (86%) with the bokashi substrate.