Bio-stimulant Potential of Organic Compost Teas on Spinach Performance and Soil Properties

Abstract

This research was conducted to investigate the influence of compost tea made from various organic sources on the growth, yield, and soil quality in spinach (Spinacia oleracea L.). The experiment followed a randomized complete block design, incorporating four treatment groups: an untreated control, poultry manure compost tea (PMCT), farmyard manure compost tea (FYMCT), and vegetable compost tea (VCT). The compost teas were applied as foliar sprays at regular intervals throughout the crop’s growth cycle. Significant improvements in growth-related traits were observed in all compost tea-treated plots compared to the control. Among the treatments, PMCT led to the highest increases in plant height, leaf area, fresh and dry biomass, and number of leaves. FYMCT and VCT also showed notable enhancements, though to a lesser extent. In addition to plant performance, PMCT significantly raised soil organic matter levels, highlighting its role in improving soil condition. These improvements were largely attributed to the rich nutrient composition and beneficial microbial populations present in the compost teas. Their application likely stimulated nutrient availability and uptake, contributing to better vegetative growth and soil fertility. The findings support the potential of compost teas, especially those derived from poultry manure, in promoting sustainable spinach production