An integrated fertilizer experiment was conducted on the spinach plant at the net house of Soil, Water and Environment department under University of Dhaka during the rabi season using pot culture. The intention of the study was to evaluate the integrated effect of vermicompost, NPK fertilizers, Cd and Pb on soil properties, spinach growth, yield and concentration of nutrients. The trial was carried out in a Completely Randomized Design (CRD) followed by two replications, having twelve treatments, including control. The maximum growth and yield contributing characteristics of spinach plant viz. plant height (23.10 cm), leaf area (61.13 cm2 plant-1), length of leaf (10.85 cm plant-1), no. of leaf (10 plant-1), yield of fresh (10.92g plant-1) and dry materials (1.05g plant-1) found in T12 (vermicompost 5 ton ha-1 + N25P8K10 kg ha-1 + Pb4 kg ha-1). All the growth and yield parameters observed lowest with the sole Cd application and the performance of sole Pb also showed reducing trends compared to other integrated treatments. The highest achievements of macro elements N (0.0798%), P (0.0027%), K (0.0068%) and S (0.0084%) of post-harvest soil with the treated pot in T12 over the control. Mineral nutrients of leaves (N-2.29%, P-1.30% and K-8.24%) were found highest in the same T12. It may be concluded that the maximum production of spinach, sustain the soil productivity and achieve the high nutritional value of the leaf in the treatment T12 (vermicompost 5 ton ha-1 + N25P8K10 kg ha-1 + Pb4 kg ha-1) recommended for its cultivation. J. Biodivers. Conserv. Bioresour. Manag. 2022, 8(2): 13-24
A pot experiment was conducted in Soil, Water and Environment department, University of Dhaka, during the late rabi season for 60 days with mung bean plants. The study was cnducted to evaluate the interactive effects of vermicompost and NPK fertilizers on mung bean plants’ growth, yield, nutrient and protein content. The trial was laid out in a completely randomized design (CRD) followed by three replications, having ten treatments, including control. The first four treatments contained vermicompost mixed with soil at the rate of 2, 4, 6, and 8 ton ha-1. The other four treatments contained 50% of N12P22K10 kg ha-1, while a single treatment possesses N25P45K20 kg ha-1. The growth and yield contributing parameters, viz. plant height (30 cm), leaf number (18 plant-1), leaf area (152 cm2), branch number (4 plant-1), weight of seed (4.45 g), yield of fresh (17.81 g) and dry (10.32 g) mung bean plant was found maximum with T10 (vermicompost 8 ton ha-1 + N12P22K10 kg ha-1). The mineral nutrient content N (4.69%), P (0.08%) and K (0.65%) attained the highest in the harvested seed in the same T10. The protein content (29.32%) was also found highest in T10. On the basis of the findings, it may be recommended to use VC 8 ton ha-1 plus N12P22K10 kg ha-1 to cultivate the mung bean in the context of Bangladesh. J. Biodivers. Conserv. Bioresour. Manag. 2023, 9(1): 29-40
This investigation aimed to assess the influence of soil-applied vermicompost, nitrogen and zinc on the vegetative growth parameters, yield, and mineral nutrient concentration of the fruits of okra (Abelmoschus esculentus L. Moench). The experiment was laid out in a Completely Randomized Design followed by three replications. Data were subjected to analysis of variance and mean values were compared using Tukey’s Range Test at p ≤ 0.05. Variation in mean values was compared among eight treatments: control (T1), 6 ton ha-1 vermicompost (T2), 60 kg ha-1 N (T3), 2 kg ha-1 Zn (T4), 6 ton ha-1 vermicompost + 60 kg ha-1 N (T5), 60 kg ha-1 N + 2 kg ha-1 Zn (T6), 6 ton ha-1 vermicompost + 2 kg ha-1 Zn (T7), and 6 ton ha-1 vermicompost + 60 kg ha-1 N + 2 kg ha-1 Zn (T8). The maximum growth performance and yield contributing properties of okra, viz. plant height (56 cm), leaf number (11 plant-1), leaf area (14.5 cm2), stem girth (3.5 cm), branch number (8 plant-1), and fruit number (6.50 plant-1), fruit diameter (5.50 cm), fruit length (13.50 cm), and weight of fresh (64.29 g) and dry plant materials (14.56 g), were found in T5. The control T1 performance showed reducing trends compared to other treatments. Although there was no significant difference with the application of vermicompost 6 t ha-1 + N 60 kg ha-1 + Zn 2 kg ha-1 (T8), the treated pot in vermicompost with 6 t ha-1 + N 60 kg ha-1 (T5) showed the best achievements of macro elements N (0.008%), P (6.70 ppm), K (0.08 cmol/kg), and S (18.22 ppm) of post-harvest soil compared to the control T1. Mineral nutrients of fruits N-1.64%, P-0.27%, K-0.30%, S-0.10%, and Fe-0.02% and protein content 10.23% were found to be highest in the identical T5 where Zn content was highest (0.28%) in T8. This study showed that the treatment of vermicompost with 6 t ha-1 + N 60 kg ha-1 (T5) contained and released quality nutrients is recommended for its overall best growth performance for okra. J. Biodivers. Conserv. Bioresour. Manag. 2023, 9(1): 101-108
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