Abstract

A study was conducted to evaluate the growth performances and yield, with the biochemical composition of Joldupi pineapple (Ananas comosus) variety Joldupgi/Honey queen under integrated nutrient management. The field experiment was conducted with seven treatments viz. T1 (BARI Recommended Dose consisted of 35g urea, 10g TSP, 30g MoP & 10g Gypsum later termed as BRD), T2 (½BRD + Well decomposed cow dung 300g), T3 (½BRD + Well decomposed cow dung 450g), T4 ( ½BRD + Vermicompost 300g), T5 (½BRD + Vermicompost 450g), T6 (½BRD + Biochar 300g), T7 (½BRD + Biochar 450g) at the existing germplasm center of Joldupi pineapple in the Agroforestry field laboratory of Sylhet Agricultural University campus during July 2019 to June 2020. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The analysis revealed that the applied treatments with integrated nutrients influenced growth parameters such as leaf number, east-west (E-W) canopy length, north-south (N-S), and leaf height from the surface. T5 treatment produced the maximum leaves number (32.5±4.63) and N-S canopy length (74.4±19.8 cm). Meanwhile, T2 was responsible for the maximum E-W canopy length (77.13±10.29 cm). However, the maximum fruit weight (328.96±5.45 g) was found in the T7 treatment. In terms of biochemical composition, maximum total soluble solids, TSS (21%), citric acid (0.89%), and vitamin C (66.18mg/100g) were found in the T7 treatment. In comparison, total sugar (16.33%), reducing sugar (7.1%), and sucrose (8.11%) wasere found in T4, T5, and T6 treatments, respectively. The highest soil pH, electrical conductivity (EC), total dissolved solids (TDS), and soil organic matter (SOM) were found to be 7.39, 53.01μS/cm, 34.98 mg/L, and 3.59%, respectively, in T7 treatment. The study found that the growth performance of pineapple and soil health were accelerated through integrating organic amendments with BRD.

Key words: Growth; Joldupi pineapple; Nutrients; Biochemical Composition; Bangladesh