http://103.7.193.12:8080/xmlui/handle/123456789/58 Tue, 09 Jun 2026 23:40:27 GMT 2026-06-09T23:40:27Z http://103.7.193.12:8080/xmlui/handle/123456789/2135 EFFECTS OF ORGANIC AMENDMENTS ASSISTED PHYTOREMEDIATION POTENTIAL OF LEAD CONTAMINATED SOIL BY MAIZE TONNI, MST. NURE FATEMA Phytoremediation, the use of plants and their associated microbes for environmental cleanup, has gained acceptance in the past 10 years as a cost-effective, noninvasive alternative or complementary technology for engineering-based remediation methods. Plants can be used for pollutant stabilization, extraction, degradation, or volatilization. This study evaluated the effects of organic amendments to enhance phytoextraction of heavy metal lead (Pb) from artificially polluted soil by maize (Zea mays). The objective of this study was to investigate the impacts of altered soil chemical properties (soil pH, OM, cation exchange capacity, electrical conductivity, base cation (Ca, Mg, K and Na) on phytoremediation of Pb contaminated soil due to application of compost, biochar, ash, poultry litter and co-compost. The treatments were a) control with 200mg Pb, b) Pb contaminated soil with compost 100g (10%), c) Pb contaminated soil with ash 100g(10%), d) Pb contaminated soil with biochar 100g (10%), e) Pb contaminated soil with poultry litter 100g (10%), f) Pb contaminated soil with co-compost (10%) and replicate three times in a completely randomized design. The results indicated thatthe compost, poultry litter significantly enhanced the growth ratio and plant heightof maize under Pb contaminated environment. Ash and biochar increased plant height same as control. Biochar and COMBI increased total amount of plant available P and N. Compost, ash, poultry litter showed the same effect on total phosphorus and nitrogen which was greater than the control. In case of soil pH, the sequence is: poultry litter> COMBI> compost> biochar>ash>control. For soil OM: compost>COMBI> biochar> control> poultry litter>ash. For soil EC: compost>poultry litter>COMBI>ash> biochar>control and soil CEC: compost>poultry litter>COMBI>biochar>ash>control. Moreover, compost enhanced base cations like Ca, Mg greater than ash, biochar, poultry litter, co-compost. Poultry litter accelerated base cations like K, Na compared to control. Therefore, it can be suggested that application of organic amendments like biochar, compost, ash, poultry litter, co-compost was the most suitable choice for the treatment of Pb contaminated soil phytoremediation. EFFECTS OF ORGANIC AMENDMENTS ASSISTED PHYTOREMEDIATION POTENTIAL OF LEAD CONTAMINATED SOIL BY MAIZE; A THESIS BY MST. NURE FATEMA TONNI, Student No. 1501363, Session: 2022-2023, Semester: July-December 2023; MASTER OF SCIENCE IN SOIL SCIENCE, DEPARTMENT OF SOIL SCIENCE, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR-5200; DECEMBER, 2023. Fri, 01 Dec 2023 00:00:00 GMT http://103.7.193.12:8080/xmlui/handle/123456789/2135 2023-12-01T00:00:00Z http://103.7.193.12:8080/xmlui/handle/123456789/2134 EFFECT OF DIFFERENT ORGANIC FERTILIZERS ON NAPA SHAK (Malva verticillata L.) RINA, MOST. AKTER An experimental study was carried out in the Soil Science Research Field of Hajee Mohammad Danesh Science and Technology University (HSTU) in Dinajpur, Bangladesh, from November 2022 to February 2023. The objective was to assess the effects of several organic manures, as well as their combination, on the growth of Napa Shak. The investigation encompassed six distinct treatments: T1 = Control, T2 = Compost (2.5 t ha-1), T3 = Cow dung (5 tha-1), T4 = Vermicompost (1.25 t ha-1), T5 = Northan organic fertilizer (0.50 t ha-1), T6 = Poultry manure (5 t ha-1) was applied. The experiment follows a randomized complete block design (RCBD). Data was gathered on the following parameters: plant height (in cm), fresh shoot weight (in g), fresh root weight (in g), and the presence of post-harvest soil S (in ppm), P (in ppm), exchangeable K (in meq 100 g-1 of soil), total N (%), pH, OC (%), and OM (%). The study analyzed the impact of different organic fertilizers on the growth of Napa Shak. The highest plant height was observed at 15 DAS, 30 DAS and harvest, with T6 (poultry manure) having the highest height at 14.13, 17.40 and 21.43 cm respectively and lowest from T1was 6.37, 8.40 and 8.40 cm respectively. The highest fresh weight (3.28 g) was also observed, with T6 having the highest root weight (0.16 g). The highest N content was found in T6 at 0.16 %, followed by T5, T4, and T3 and the lowest from T1 0.09%. The highest available P was 24.33 ppm from T6 and the lowest from T1 (9.68 ppm) with having the highest available S at 16.08 ppm and lowest from T1 (7.03 ppm). T6 also had the highest OC and OM values at 0.67 and 1.17 %, with T6 treatment following T5, T3, T4, and T2 were 0.58, 0.56, 0.54 and 0.54 % respectively in terms of OC and OM and lowest form T1 (control). The study concluded that T6 fertilizer poultry manure at a rate of 5 t ha -1 produced the maximum growth of Napa Shak. Further research is needed to determine the regional adaptability of this study. EFFECT OF DIFFERENT ORGANIC FERTILIZERS ON NAPA SHAK (Malva verticillata L.); A THESIS BY MOST. AKTER RINA; Student No. 1601323, Session: 2021-2022, Thesis Semester: January - June, 2023; MASTER OF SCIENCE (M.S.) IN SOIL SCIENCE, DEPARTMENT OF SOIL SCIENCE, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR, BANGLADESH; DECEMBER 2023. Fri, 01 Dec 2023 00:00:00 GMT http://103.7.193.12:8080/xmlui/handle/123456789/2134 2023-12-01T00:00:00Z http://103.7.193.12:8080/xmlui/handle/123456789/2133 UTILIZATION OF AVAILABLE ONLINE-BASED ORGANIC FERTILIZERS ON THE VEGETATIVE GROWTH OF WATER SPINACH ANNY, MAHBUBA ALAM The experiment was conducted at the shade besides Academic building-1 of Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200, from November 2022 to March 2023 to study the utilization of available online-based organic fertilizers on the vegetative growth of water spinach. The experiment was laid out Completely Randomized Design (CRD) with 8 treatments and 3 replications. A total of 24 experimental pots were used. Every treatment used as 1% Kg-1 soil. There were eight treatments as follows: T1 = Control (only soil), T2 = 1% Bonemeal Kg-1 soil, T3 = 1% Cowdung Kg-1 soil, T4 = 1% Neem cake Kg-1 soil, T5 = 1% Oyster shell powder Kg-1 soil, T6 = 1% Cocopeat Kg-1 soil, T7 = 1% Vermicompost Kg-1 soil, T8 = 1% Egg shell powder Kg-1 soil. The results showed that the vegetative growth and yield attributing components such as plant height, number of leaves plant-1, fresh shoot biomass, dry shoot biomass, fresh root biomass, dry root biomass responded significantly except plant and no of leaves at early stages due to the application of available online based organic fertilizers. The highest values of different parameters such as plant height (12.40 cm) in T5 treatment at 50 DAS considered as best time of economic yield, fresh shoot biomass (30.95 g) and dry shoot biomass (4.64 g) in T6 treatment due to 1% cocopeat Kg-1 soil application, fresh root biomass (2.27 g) and dry root biomass (0.34 g) was obtained in T3 treatment where 1% Cowdung Kg-1 soil were applied. The lowest results were found in the control treatment (T1). A significant increase in the N contents in leaves, shoots and roots as well as their uptake were observed due to the different treatments. Treatment T6 performed the highest yield as a result of 1% cocopeat Kg-1 soil application. Treatment T5 composed of 1% Oyster shell Kg-1 soil gave the highest post-harvest soil pH and available S. The highest total N, available P, exchangeable K and OC noticed in T7 (0.04), T2 (25.30), T6 (0.19) and T4 (0.97), respectively might be better for sustainable soil health for growing crops. Overall result suggested that incorporation of 1% cocopeat Kg-1 soil can be better for cultivation of Water spinach in respect to higher yield response and might be efficient cultivation. UTILIZATION OF AVAILABLE ONLINE-BASED ORGANIC FERTILIZERS ON THE VEGETATIVE GROWTH OF WATER SPINACH; A THESIS BY MAHBUBA ALAM ANNY, STUDENT NO. 1601385, SESSION: 2022-2023, SEMESTER: JANUARY-JUNE 2023; MASTER OF SCIENCE (M. S.) IN SOIL SCIENCE, DEPARTMENT OF SOIL SCIENCE, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY DINAJPUR-5200; DECEMBER, 2023. Fri, 01 Dec 2023 00:00:00 GMT http://103.7.193.12:8080/xmlui/handle/123456789/2133 2023-12-01T00:00:00Z http://103.7.193.12:8080/xmlui/handle/123456789/2132 RESIDUAL EFFECT OF BIOCHAR WITH REDUCED DOSES OF CHEMICAL FERTILIZERS ON THE SOIL PROPERTIES, GROWTH AND YIELD RESPONSE OF OKRA JANNAT, MOST. TANBIN The research work was conducted in the research field of the Department of Soil Science, Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur during November 2022 to January 2023 to study the residual effect of biochar with reduced doses of chemical fertilizers on the soil properties, growth and yield response of okra (Local variety: Heera). The experimental soil belongs to the Old Himalayan Piedmont Plain (AEZ-1). The experiment was laid out in the randomized complete block design (RCBD) having eleven (11) treatments with three replications. The treatments were T1 = No residual biochar + No chemical fertilizer (Control), T2 = 100% RDF (Recommended Dose of Fertilizers), T3 = 50% RDF + Residual 20 t ha-1 Rice Husk biochar, T4 = 50% RDF + Residual 20 t ha-1 Sawdust biochar, T5 = 50% RDF + Residual 20 t ha-1 Biochar enriched organic fertilizer (OF), T6 = 75% RDF + Residual 15 t ha-1 Rice Husk biochar, T7 = 75 % RDF + Residual 15 t ha-1 Sawdust biochar, T8 = 75% RDF + Residual 15 t ha-1 Biochar enriched organic fertilizer (OF), T9 = 100% RDF + Residual 10 t ha-1 Rice Husk biochar, T10 = 100% RDF + Residual 10 t ha-1 Sawdust biochar, T11 = 100% RDF + Residual 10 t ha-1 Biochar enriched organic fertilizer (OF). The results showed that the growth and yield attributing components such as plant height, number of fruit plant-1, marketable fruit weight plant-1, fruit weight plot-1, fruit length, fresh shoot biomass plant-1, dry shoot biomass plant-1, root length, fresh root weight, dry root weight responded significantly except fruit breadth due to the application of different level of chemical fertilizers along with different level of residual biochar combination. The highest values of different parameters such as plant height (74.2 cm), number of fruit plant-1 (16.6), marketable fruit weight plant-1 (197.8 g), fruit weight plot-1 (1.18 kg), fruit length (11.3 cm), fruit breadth (5.0 cm), fresh shoot biomass plant-1 (181.5 g), dry shoot biomass plant-1 (30.8 g) were obtained in T11 treatment where 100% RDF + Residual 10 t ha-1 Biochar enriched organic fertilizer (OF) were applied. The lowest results were found in the control treatment (T1). In post- harvest soil, the treatments (T4 and T5) receiving high amount (20 t ha-1) of biochar gave the highest amount of total N, available P, exchangeable K, available S, organic carbon (OC) and organic matter (OM). In case of pH the highest (7.31) was found in T5 treatment. The residual effect of biochar with reduced doses of chemical fertilizers might be better for sustainable soil health for growing crops. Overall, the results suggested that reduced doses of chemical fertilizers in previous biochar incorporated field can be better for cultivation of okra in respect to higher yield response and might be advantageous cultivation of crops in the next year. RESIDUAL EFFECT OF BIOCHAR WITH REDUCED DOSES OF CHEMICAL FERTILIZERS ON THE SOIL PROPERTIES, GROWTH AND YIELD RESPONSE OF OKRA; A THESIS BY MOST. TANBIN JANNAT, Student No. 1601400, Session: 2022-2023, Semester: January-June 2023; MASTER OF SCIENCE IN SOIL SCIENCE, DEPARTMENT OF SOIL SCIENCE, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR-5200; DECEMBER, 2023. Fri, 01 Dec 2023 00:00:00 GMT http://103.7.193.12:8080/xmlui/handle/123456789/2132 2023-12-01T00:00:00Z