http://localhost:8080/handle/123456789/2650 Sat, 18 Apr 2026 16:30:13 GMT 2026-04-18T16:30:13Z http://localhost:8080/handle/123456789/3680 POTASSIUM- THE QUALITY ELEMENT IN ENHANCING PRODUCTIVITY AND ALLEVIATING DETRIMENTAL EFFECT OF ABIOTIC STRESS IN PLANTS ZANNAT, MOSAMMAT SALMA ABSTRACT Potassium fertilizer management is beneficial for improving growth, yield and yield components of field crops under moisture stress condition. Three field experiments were conducted at the research farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the rabi season of 2016-2018 to evaluate the effects of potassium fertilizer enhancing the productivity and alleviating detrimental effect of abiotic stress along with other recommended fertilizer on the growth, yield, nutrient management, shelf life of the plant product and soil chemical properties, the research was conducted based on selected wheat (BARI gom26), rice (BARI dhan28) and carrot (New Kuroda) variety. The experiments were laid out in Split Plot Design and RCBD method with three replications. The first experiment was conducted on wheat in rabi season with sixteen treatment combination (4 levels of irrigation X 4 levels of K doses) viz. I 0 = control (normal irrigations), I = Water stress at vegetative stage, I 2 = Water stress at flower initiation stage, I 3 = Water stress at milking stages and K = 0 kg K/ha, K 1 = 60 kg K//ha, K 2 = 90 kg K/ha, K = 120 kg K/ha. Growth and yield contributing characters mainly plant height, number of spikelet’s, thousand grains weight of wheat crop were significantly influenced by the potassium fertilizer and water stress at different growth stages. The highest grain yield of wheat (4.04 t/ha) was observed under 120 kg K/ha from I 0 K 3 3 treatment combination, while the lowest grain yield (2.29 t/ha) was recorded from I 0 K 1 and I 0 K treatment combinations respectively. Among the combined effect of water stress conditions and different doses of potassium I 2 0 K combination provided the best result. The second experiment was conducted on rice in rabi season with eleven treatments including control viz. T 3 = Control (no fertilizer), T 2 = Fertilizer recommended dose for BRRI dhan28. (FRD) N 120 P 18 K 75 S 13 Zn 1.5 , T 3 1 = 25% K supplement by cowdung (1.25 t/ha) + 75% K (56.25 kg /ha K) from MoP, T = 25% K supplement by poultry liter (2.20 t/ha) + 75% K (56.25 kg/ha K) from MoP, T 5 4 = 25% K supplement by vermicompost (1.87 t/ha) + 75% K (56.25 kg/ha K) from MoP, T 6 = 50% K supplement by cowdung (2.50 t/ha) + 50% K (37.5 kg/ha K) from MoP, T = 50% K supplement by poultry liter (4.40 t/ha) + 50% K (37.5 kg/ha K) from MoP, T = 50% K supplement by vermicompost (3.75 t/ha) + 50% K (37.5 kg/ha K) from MoP, T 9 8 = 75% K supplement by cowdung (3.75 t/ha) 1 0 7+ 25% K (18.75 kg/ha K) from MoP, T = 75% K supplement by poultry liter (6.60 t/ha) + 25% K (18.75 kg/ha K) from MoP, T 11 10 = 75% K supplement by vermicompost (5.62 t/ha) + 25% K (18.75 kg/ha K) from MoP. The study in aspect of growth and yield contributing characters mainly plant height, effective tillers/hill, panicle length, filled grain/panicle, thousand grain weight, and harvest index and grain yield of boro rice. The maximum grain yield of rice (6.55 t ha -1 ) was produced from T treatment which was significantly different from the T 1 treatment (2.35 t ha -1 8 ). The third experiment was conducted on carrot with eight treatments including control viz. T 1 = 0 kg K/ha, T 2 = 20 kg K/ha, T 3 = 40 kg K/ha, T 4 = 60 kg K/ha, T = 100 kg K/ha, T 7 = 120 kg K/ha, T = 140 kg K/ha. Storage quality of carrot indicated that after seven days the lowest moisture reduction percentage was observed in K 8 (20.39%) while the highest moisture reduction percentage was found in K 0 (61.45%) followed by K 1 5 (60.24%). After 14 and 21 days same trend of moisture reduction were found. In room temperature, K treatment provided the best result and enhanced the shelf life of carrot. So, it can be suggested that the improvement of K- nutritional status of plants might be of great importance for the survival of crop plants under environmental stress conditions and potassium fertilizer with other recommended fertilizers would be ideal for better crop growth, increasing yield and shelf life of crops. 5 5 = 80 kg K/ha, T 6 A Thesis Submitted to the Faculty of Agriculture Sher-e-Bangla Agricultural University, Dhaka in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY IN SOIL SCIENCE SEMESTER: JANUARY - JUNE, 2019 Sat, 01 Jun 2019 00:00:00 GMT http://localhost:8080/handle/123456789/3680 2019-06-01T00:00:00Z http://localhost:8080/handle/123456789/3661 EFFECTS OF INDUSTRIAL POLLUTION AND ARSENIC CONTAMINATION ON YIELD AND METAL ACCUMULATION IN RICE GRAIN AND SOIL BEGUM, MOST. NASRIN Heavy metal accumulation in rice grain appears to be a perilous problem because of application of chemical fertilizers, irrigation with arsenic (As) contaminated groundwater and use of industrial effluents. The present study was done to assess the yield and metal accumulation in Boro (BRRI dhan 28) and T. Aman (BRRI dhan 33) rice grown in industrially polluted and arsenic (As) contaminated soils. Treatments of the first pot culture experiment were T 0 (100% RDCF) and T 2 - N 75 P 15 K 30 S 10 – Control treatment; T 1 Zn 1.5 ii - N 150 P 30 (50% RDCF) + 6 ton cowdung ha ) in industrially polluted soils (S 1 – Non-polluted soil, S 2 – Polluted soil-1 and S 3 – Polluted soil-2). For the second pot experiment, different levels of irrigation (I 1 – Traditional irrigation and I 2 – Alternate wetting drying) were added along with fertilizes and manure doses (T 0 – Control; T 1 - N 150 P 30 K 60 S 20 Zn 3.0 K 60 S 20 (100% RDCF); and T 2 - N 150 P 60 K 60 S 20 Zn 3.0 ; T 3 –(N 75 P 15 K 30 S 10 Zn 1.5 (50% RDCF)+ 6 ton cowdung ha - N 75 P 15 K 30 S 10 Zn 1.5 (50% RDCF)+ 5-ton compost/ha) were considered as treatments for As-contaminated soils. Both the pot experiments were carried out in the net-house during December 2015 to November 2016. The experiments were laid out in a 2- factor Randomized Complete Block Design (RCBD) with three replications. Results indicated that heavy metal accumulation and yield reduction were more prominent in both types of contaminated soils compared to non-contaminated (control) soils. In contaminated soils, the minimum yield of Boro and T. Aman rice were observed in T 0 S 3 and the maximum yield was in T 2 S 1 followed by T 1 S 1 treatment. However, the maximum value of Cd, Pb and Zn accumulation in the grains of both Boro and T. Aman rice was found in the T 1 S 3 treatment, while the lower values were noted in T 0 treatment. Elevated levels of heavy metals such as Zn, Cd, Pb, Cr and Ni were found in soils receiving T 1 S 3 treatment. In case of As contaminated soils, the minimum yield for both Boro and T. Aman rice was obtained in T 0 I 2 followed by T 1 , and the maximum yield was in T 4 I 1 followed by T 3 I 1 treatment. Higher accumulation of Cd and Zn in both Boro and T. Aman rice, As in Boro rice, and Pb in T. Aman rice grains were recorded in the treatment T 2 I 2 I 2 , while the lowest values were noted in T 0 treatment. The higher and lower values of the heavy metals were recorded in T 4 and T 0 I 2 treatments, respectively. In addition to pot experiments, a field survey was done in Gazipur Sadar upazila to investigate the effect of toxic heavy metals and the contaminated wastewater on the livelihood and food safety of the people living adjacent to industrial areas. The survey results revealed that industrial effluent contamination remarkably affected rice production and further it caused deterioration of grain quality leading to low market price. Nevertheless, industrial effluents are directly or indirectly causing several socioeconomic, health and environment-related problems. A Thesis Submitted to the Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY IN SOIL SCIENCE Tue, 01 Jan 2019 00:00:00 GMT http://localhost:8080/handle/123456789/3661 2019-01-01T00:00:00Z http://localhost:8080/handle/123456789/3658 EFFECTS OF FERTILIZER, MANURE AND WATER MANAGEMENT ON THE NUTRIENT AVAILABILITY, LEACHING, SOIL FERTILITY AND PRODUCTIVITY UNDER RICE- RICE CROPPING PATTERN SAMPA, MOSAMMAT SELINA AKTAR Three experiments were conducted at the net house and research field of Sher-e-Bangla Agricultural University during January 2013 to June 2014 to study the effects of fertilizer, manure and irrigation on the nutrient availability, leaching, soil fertility and productivity under rice-rice cropping pattern. A net house experiment with 30 (2 levels of irrigation x 5 fertilizer treatments x 3 replications) undisturbed soil columns (40 cm length and 30 cm diameter) was set up at a net-house of SAU, with rice growing in boro and T. aman seasons during January 2013-December 2013. Soil cores were placed on the plastic containers and leachate collection systems were developed. BRRI dhan29 and BRRI dhan33 were grown on the cores with two levels of irrigation (I 1 : continuous flooding I 2 : saturated condition) and fertilizer treatments (T 0 : Control T 1 : RDCF, T 2 : 50% NPKS + 5tha -1 cowdung, T 3 : 50% NPKS + 5 tha -1 compost, T 4 : 50% NPKS+ 3.5 tha -1 poultry manure. The leachate samples were analyzed for nutrient during the growing seasons. The leachate nutrient concentration varied with irrigation, fertilizer and time of sample collection. Higher levels of leachate N, K and S concentrations were found in the T 4 treatment. Phosphorus leaching decreased with increasing days from transplantation but N and S leaching were in similar trend during the rice growing period. Application of organic plus inorganic fertilizer increased the level of organic matter, P and K availability of post experiment soils. Application of poultry manure increased more the soil pH, available P and level of organic matter in post-experiment soils. The continuous flooded irrigation in combination with different fertilizer treatments increased the level of K in post-harvest soil. A field experiment involving 2 levels of irrigation and 8 fertilizer treatments (2x8x3= 48 plots) were applied in the boro rice field soil and without rice planted soil (PVC pipe installed fallow area) during January 2014-June 2014. The experiment was laid out in split plot design with irrigation (I 1 : traditional irrigation i.e. continuous flooding and I 2 : saturated condition) to the main plots and fertilizers to the sub plots. The fertilizer treatments were T 0 =Control, T 1 =N 120 P 25 K 60 S 20 Zn 2 (RDCF), T 2 =50% NPKS + 5 tha -1 cowdung, T 3 =70% NPKS + 3 tha -1 cowdung, T 4 =50% NPKS + 5 tha compost, T 5 =70% NPKS + 3 tha -1 compost, T 6 =50% NPKS + 3.5 tha -1 poultry manure, T 7 =70% NPKS + 2.1 ton poultry manure ha -1 . Boro- T. aman rice experiments were conducted previously in the same plots with the application of same treatments from 2012. The effect of residual and renewal application of fertilizer and manure influenced the pore-water nutrient availability, yield and the fertility of post experiment soils. The higher grain yields were obtained in inorganic plus organic treatments. The highest grain yield was obtained from I 2 T 7 , I 2 T 5 and I 1 T 5 treatment combinations. The higher concentrations of N, P and K were found in the pore-water of T 6 and T 7 treatments where higher yields were also obtained. Porewater P concentrations decreased with increasing days after transplantation. At flowering stage, the highest pore-water P was found in I 1 T 4 treatment combination. Higher concentrations of pore-water K were found into the core (fallow area) than rice root zone area (outside) during the cropping season. Higher N, P and K concentrations were found in the post-harvest soils (root zone area and fallow area) where manures were applied. The higher levels of organic matter were found in the post-harvest soils of T 2 treatment of rice root zone area (1.60%) and the soils of fallow area (1.59%). The application of poultry manure increased the pH of the soil. Another field experiment was conducted at SAU Farm with rice growing in boro and T. aman seasons during July 2013 to June 2014. The three levels of irrigation (I 1 : continuous flooding, I 2 : saturated condition and I 3 : Alternate wetting and drying) and eight fertilizer treatments (similar to expt. 2) were applied in this experiment. The highest T. aman rice yield was found from I 2 T 2 and the highest grain yield of boro rice (7.94 t/ha) was recorded with the treatment combination I 1 T 7 . The pH of 6.9 was obtained in the soil where inorganic fertilizer and poultry manure were applied. A Thesis Submitted to the Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY IN SOIL SCIENCE Sun, 01 Jan 2017 00:00:00 GMT http://localhost:8080/handle/123456789/3658 2017-01-01T00:00:00Z http://localhost:8080/handle/123456789/2615 EFFECT OF NEXT GENERATION FERTILIZER PRODUCTS ON GROWTH AND YIELDS OF DIFFERENT CROPS ABDULLAH AL - FAROQUE, MOHAMMAD To reduce the existing yield gap between research and farmer’s field, three separate experiments were carried out during the period from March, 2014 to June, 2015 at the experimental field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, Bangladesh. To evaluate the effects of next generation fertilizers along with other recommended fertilizers on the growth, yield and soil chemical properties, the research was conducted based on selected maize, tomato and rice varieties. The experiments were laid out in RCBD method with three replications. The first experiment was conducted on maize in kharif season with eight treatments including control viz. T 0 = control (no fertilizer), T 1 = recommended dose N 250 P 50 K 100 S 25 Zn = American NPK + N 250 P 50 K 100 S 25 Zn 2 B 1 , T 3 = Bio-forge + N 250 P 50 K 100 S 25 Zn = Wuxal + N B 250 1 P 50 and T K 7 100 S 25 Zn 2 B 1 , T = Nitro Plus + N 5 = Peak + N 250 P 50 K 250 100 S P 50 25 K Zn 100 2 S B 25 1 Zn 2 B 1 , T 6 = Root Feed + N 2 2 B B 250 and three maize varieties namely V = BARI Hybrid Bhutta-5 , V 2 = BARI Hybrid Bhutta-6 & V = BARI Hybrid Bhutta-9. Growth and yield contributing characters mainly plant height, cob length, cob weight, 100-kernel weight and kernel yield of maize crop were significantly influenced by the next generation fertilizers. Bio-forge along with other recommended fertilizers performed the best compared to other treatments of the study in aspect of kernel yield (5.95 tha -1 3 ) and statistically similar result showed by Root feed along with other recommended fertilizers and produced 5.12 tha -1 kernel yield. Among the varieties, BARI Hybrid Bhutta-9 performed the best compared to other two varieties. The second experiment was conducted on tomato in rabi season with six treatments including control viz. T = control (no fertilizer), T 1 = recommended dose N 140 P 35 K 75 S 15 Zn 2 B 1 kg ha -1 = Bio-forge + N 140 Zn 2 P B 35 1 K , T 75 5 S 15 Zn 2 B 1 , T 3 =Wuxal Super + N = Nitro Plus + N 140 P 35 K 75 S 15 Zn 140 2 B P 1 35 K 75 S 15 Zn 2 B 1 , T 4 , T 1 1 kg ha ,T P 2 = Root Feed + N and three tomato varieties namely V = BARI Tomato-2, V 2 = BARI Tomato-14 & V = BARI Tomato-15. Among the next generation fertilizers, Bio-forge along with other recommended fertilizers performed the best compared to other treatments of the study in aspect of growth and yield contributing characters mainly plant height, flower cluster plant -1 3 , number of fruits cluster -1 , fruit plant -1 4 50 K 100 140 1 1 P and fruit yield (114.43 t ha ). Among the varieties BARI Tomato-14 performed the best compared to other two varietal treatments. The third experiment was conducted in boro rice with six treatments including control viz T 0 = Control (no fertilizer), T 1 =recommended dose N 140 P 20 K 60 S 18 Zn 2 kg ha -1 = Bio-forge + N 140 P 20 K 60 S 18 Zn 2 , T 3 = Wuxal Super + N 140 P 20 K 60 S 18 Zn 2 , T 4 = Root Feed + N = Nitro Plus + N 140 P 20 K 60 S 18 Zn 2 and three rice varieties namely V 1 , T 140 P 2 20 K = BRRI dhan29, V = BRRI dhan28 & V = BRRI dhan58. Among the next generation fertilizers, Bio-forge along with other recommended fertilizers performed the best compared to other treatments of the study in aspect of growth and yield contributing characters mainly plant height, effective tiller hill 3 , panicle length , filled grain panicle -1 , 1000-grain weight, harvest index and grain yield (8.61 tha ). Among the varieties BRRI dhan29 showed best performance compared to other two treatments. There was no significant variation found for soil pH, organic carbon in postharvest soil of three experimental fields due to application of next generation fertilizers. Available S in maize field, total N content, available P and available S in tomato field and total N content, available P and available S in rice field showed a positive significant change. The next generation fertilizer viz. Bio-forge and Root feed along with other recommended fertilizers would be ideal for better crop growth and yield. -1 -1 60 S -1 , T S 35 18 2 25 K Zn 2 Zn 75 2 S -1 2 0 15 , T 5 A Thesis Submitted to the Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY IN SOIL SCIENCE SEMESTER: JANUARY - JUNE, 2017 SHER-E-BANGLA AGRICULTURAL UNIVERSITY Thu, 01 Jun 2017 00:00:00 GMT http://localhost:8080/handle/123456789/2615 2017-06-01T00:00:00Z