GROWTH AND YIELD OF POTATO (BARI Alu-25; ASTORIX) AS INFLUENCED BY INTEGRATED NUTRIENT MANAGEMENT

Abstract

The experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka-1207 during the period from November 2021 to February2022 to examine the growth and yield of potato (BARI Alu-25; ASTORIX) as influenced by integrated nutrient management. The experiment consisted of nine treatments viz. T 1 (150 kg N/ha from urea + 30 kg P/ha from TSP + 140 kg K/ha from MoP - only inorganic), T 2 (130 kg N/ha from urea + 30 kg P/ha from TSP + 140 kg K/ha from MoP + 20 kg N/ha from vermicompost), T 3 (110 kg N/ha from urea + 30 kg P/ha from TSP + 140 kg K/ha from MoP + 40 kg N/ha from vermicompost), T 4 (90 kg N/ha from urea + 30 kg P/ha from TSP + 140 kg K/ha from MoP + 60 kg N/ha from vermicompost), T 5 (70 kg N/ha from urea + 30 kg P/ha from TSP + 140 kg K/ha from MoP + 80 kg N/ha from vermicompost), T 6 (50 kg N/ha from urea + 30 kg P/ha from TSP + 140 kg K/ha from MoP + 100 kg N/ha from vermicompost), T 7 (30 kg N/ha from urea + 30 kg P/ha from TSP + 140 kg K/ha from MoP + 120 kg N/ha from vermicompost), T 8 (150 kg N/ha from urea + 30 kg P/ha from TSP + 140 kg K/ha from MoP + 40 kg N/ha from vermicompost) and T 9 (control; no nutrient application). The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Significant variation among the treatments was found for most of the parameter due to different levels of integrated nutrient management practices. The treatment T 5 (70 kg N/ha from urea + 30 kg P/ha from TSP + 140 kg K/ha from MoP + 80 kg N/ha from vermicompost) exhibited the minimum 15.3 days to 100% emergence. The maximum number of haulm hill -1 (7.50), fresh weight of haulm hill

(185.60 g) and dry weight of haulm hill -1 (33.70 g), number of tuber hill (8.12), weight of tuber hill -1 (360.50 g), dry weight of 100 g fresh tuber (21.63 g), tuber weight plot

(14.55 kg) and tuber yield ha -1 -1 (30.24 t) were obtained with T5 treatment followed by T 6 (50 kg N/ha from urea + 30 kg P/ha from TSP + 140 kg K/ha from MoP + 100 kg N/ha from vermicompost) whereas the control treatment T 9 (no nutrient application) showed the lowest results in all parameters as well as on yield. There was non signification of soil pH, organic carbon and exchangeable K in postharvest soil but significant variation was found in case of total N, agailable P and available S. The treatment T 8 (150 kg N/ha from urea + 30 kg P/ha from TSP + 140 kg K/ha from MoP + 40 kg N/ha from vermicompost) showed the highest N (0.273%), P (23.27 ppm) and S (28.20 ppm) content followed byT 5 (70 kg N/ha from urea + 30 kg P/ha from TSP + 140 kg K/ha from MoP + 80 kg N/ha from vermicompost) whereas the lowest was obtained from control treatment. So, the treatment T 5 (70 kg N/ha from urea + 30 kg P/ha from TSP + 140 kg K/ha from MoP + 80 kg N/ha from vermicompost) may be considered as the best treatment for potato production (BARI Alu-25; ASTORIX).