Response of growth, yield and its quality of violet carrot to fertilization with poultry manure, spraying with Brassinolide and Reishi mushroom extract

Abstract

A factorial experiment was conducted with three factors (3×3×3) and three replicates within a split-plot arrangement and applying a randomized complete block design (RCBD) for the fall season 2023-2024. The first factor is poultry manure at three levels (0, 5000 and 10000) kg per hectare. The second factor is spraying plants with Barasinolide growth regulator at three concentrations (0, 1 and 2) mg/L. The third factor is spraying plants with Reishi mushroom extract, which is prepared by the aqueous extraction method at three concentrations (0%, 5% and 10%). The plants are sprayed twice, the first time after the appearance of three true leaves, where the parasinolide growth regulator is sprayed first, and after three days the mushroom extract is sprayed, and the second spray is twenty days after the first spray. Decomposed poultry manure was distributed randomly on the main plots before planting. Adding poultry manure increased plant height, number of leaves, anthocyanin and sugar content. Spraying with brassinolide growth regulator also increased plant height, root weight of purple carrots, anthocyanin and sugar content. Spraying with aqueous extract of Reishi mushroom also increased anthocyanin and sugar content. All additions improved the vegetative and quantitative characteristics and the total production of purple carrots.