Effects of Different Sources of Organic Manures and Chemical Fertilizers on Growth & Yield of BJRI Developed Kenaf Variety

Abstract

Jute, frequently referred to as Bangladesh’s “golden fibre,” continues to play a vital role in the country’s agrarian economy, supporting industrial sustainability and sustaining rural livelihoods. This study investigated the effects of integrated organic and inorganic nutrient management on the growth and fibre yield of BJRI Kenaf-5 at Kishoreganj, Bangladesh, during the 2023 growing season. The experiment was established using a randomized complete block design with three replications and six nutrient management treatments. These treatments involved the application of the recommended dose of fertiliser (RDF: 132–50–40 kg N–P–K ha⁻¹) in combination with various organic amendments, including cow dung (CD), poultry manure (PM), and vermicompost (VC). Key growth parameters—such as plant population, plant height, base diameter, fibre yield, and stick yield—were systematically recorded. The results demonstrated significant differences (p ≤ 0.05) among the treatments, highlighting the influence of integrated nutrient management on both vegetative growth and fibre production in BJRI Kenaf-5. The integrated treatment T6 (100% RDF + CD 1.5 t ha⁻¹ + PM 1.5 t ha⁻¹ + VC 1.5 t ha⁻¹) produced the highest fiber yield (3.36 t ha⁻¹) and stick yield (6.73 t ha⁻¹), representing a 75.9% increase in fiber yield over the control. Plant height was highest under T5 (3.11 m), while maximum base diameter was observed in T4 (19.63 mm). Principal component analysis explained 99.1% of total variance, confirming strong positive associations among growth parameters. Pearson’s correlation revealed highly significant relationships (r = 0.96–0.99) between vegetative growth and yield traits.The results demonstrate that integrated nutrient management significantly enhances biomass accumulation and fiber productivity in BJRI Kenaf-5, suggesting T6 as an optimal nutrient strategy for sustainable kenaf cultivation in the agro-ecological conditions of Kishoreganj.