http://103.7.193.12:8080/xmlui/handle/123456789/124 2026-07-26T08:28:02Z 2026-07-26T08:28:02Z RAHMAN, MD. MANSUR http://103.7.193.12:8080/xmlui/handle/123456789/2166 2026-06-22T07:18:17Z 2008-01-01T00:00:00Z

EFFECT OF ORGANIC AND INORGANIC FERTILIZERS ON AZOTOBACTER AND CYANOBACTERIAL POPULATION AND RICE CROP IN PIEDMONT SOIL RAHMAN, MD. MANSUR A study was undertaken to evaluate the combined effects of organic and inorganic fertilizers on the indigenous Azotobacter and cyanobacterial population in soil and on the growth and yield of rice for the Boro-fallow-T. aman rice cropping pattern. The study was carried out both at the field and the laboratory of the Department of Soil Science, Hajee Mohammad Danesh Science and Technology University, Dinajpur. In the field experiment, BRRI dhan28 (boro) and Kataribhog (aman) were grown following the rice-rice cropping pattern in the two consecutive years of 2009 and 2010 in Piedmont soil (AEZ#1). The study was initiated in November 2008 and was continued up to January 2011 to complete two crop cycles with boro rice (BRRI dhan28) as the first crop and T. aman rice (Kataribhog) as the second crop in each cycle. The experiment was laid out in the randomized complete block design (RCBD) with eleven treatments having three replications. The 11 treatment combinations consisting of N, P, K, S, Zn, cowdung (CD), poultry manure (PM) and mustard oil cake (MOC) including one control treatment were as follows- T0 : Control, T1 : 100 % RFD on the soil test basis, T2 : 75% RFD+25% CD, T3 : 50% RFD+50% CD, T4 : 75% RFD+25% PM, T5 : 50% RFD+50% PM, T6 : 75% RFD+25% MOC, T7 : 50% RFD+50% MOC, T8 : 75% RFD+25 % (CD, PM, MOC), T9 : 50% RFD+50% (CD, PM, MOC) and T10 : 34% CD + 33% PM + 33% MOC. Data were recorded on yields, yield components and N, P, K and S contents and uptake by the grain and straw of rice. In the laboratory indigenous cyanobacterial and Azotobacter population in soil under study were determined before transplantation, 30 and 60 days after transplanting (DAT) and after harvest of rice crops. Soil organic matter status, total N, available P, S and exchangeable K of soil were also determined at 30 and 60 DAT and after harvest of rice crop to assess the nutrient dynamics due to impose of different treatments. The results of the present investigation indicated that integration of organic and inorganic fertilizers significantly influenced the yield and yield components of rice, indigenous cyanobacterial and Azotobacter population in soil and soil chemical properties. Results showed that the highest grain yields of boro rice of 6.09 and 5.75 and those of straw of 6.86 and 7.65 t ha-1 were recorded in treatment T8 having 75% chemical fertilizer and 25% organic manures during boro seasons of 2009 and 2010, respectively. The lowest grain yields of 3.15 and 2.82 and those of straw yields of 3.88 and 3.37t ha-1 were recorded in T1 during 2009 and 2010, respectively. The highest grain yields of T. aman rice of 5.40 and 4.90 and those of straw yields of 10.21 and 11.21t ha-1 were recorded in T8 during T. aman seasons of 2009 and 2010 respectively. The lowest grain yields of T. aman rice of 2.78 and 2.28 and those of straw yields of 4.67 and 5.67t ha-1 were found in T1 during 2009 and 2010, respectively. The yield components viz. plant height, tillers hill-1, panicle length, grains panicle-1 and 1000 grain weight were significantly affected by the treatments and the maximum values were recorded in treatment T8. The highest N, P, K and S contents and uptake by rice were recorded in treatment T8. Cyanobacterial and Azotobacter population was significantly affected by the treatments. Higher cyanobacterial population was recorded in 2010 than those were observed in 2009. On the contrary, cyanobacterial population was higher in boro season than those were recorded in T. aman season of the same year. Similar pattern of Azotobacter popular was recorded during the entire period but the population was higher in boro season than those of T. aman season. Soil organic matter and nutrient status such as total N, available P, S and exchangeable K were slightly increased due to experimentation. From the overall results, it can be concluded that integration of organic and inorganic fertilizers can save 25% chemical fertilizer without any yield decline. EFFECT OF ORGANIC AND INORGANIC FERTILIZERS ON AZOTOBACTER AND CYANOBACTERIAL POPULATION AND RICE CROP IN PIEDMONT SOIL; A DISSERTATION FOR THE DEGREE OF DOCTOR OF PHILOSOPHY IN SOIL SCIENCE BY MD. MANSUR RAHMAN, STUDENT No: 0805002, SESSION: 2008; DEPARTMENT OF SOIL SCIENCE, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR, BANGLADESH.

2008-01-01T00:00:00Z ISLAM, MD. SADEQUL http://103.7.193.12:8080/xmlui/handle/123456789/2165 2026-06-18T06:20:01Z 2016-05-01T00:00:00Z

EFFECTS OF LIME, PHOSPHORUS AND POTASSIUM ON CROP YIELDS OF DIFFERENT CROPPING PATTERNS IN ACID SOILS ISLAM, MD. SADEQUL Experiments were conducted during 2012-2014 at HSTU farm (AEZ-1) and Farmer’s’field (FF) (AEZ-27) under Dinajpur district following two cropping patterns viz. Wheat-Mungbean-T.aman and Wheat-fallow-T.aman to evaluate the effects of lime, P and K on yields of crop as well as soil properties. There were seven treatment combinations viz. L0 (control), L1, L2, L1P, L2P, L1PK and L2PK. The experiments were laid out in Randomized Complete Block Design (RCBD) with 4 replications. The doses of lime were 0, 1 and 2 t ha-1 for both locations. The P was 20, 13 and 6 kg ha-1 for Wheat-Mungbean-T.aman at HSTU and 25, 22 and 12 kg ha-1 at FF respectively. The rate of K was 80, 32 and 50 kg ha-1 at HSTU and 61, 30 and 42 kg at FF. Other nutrients i.e. 15-100 kg N, 8-15 kg S, 1-2 kg Zn and 1-1.5 kg B were applied as basal irrespective of crops and locations on soil test basis (FRG 2012). Lime was added to the first crop only and its residual effects were evaluated on the succeeding crops over 2-crops cycles. The chemical fertilizers Urea, TSP, MoP, Gypsum, Zinc Sulphate and Boric acid were used as sources of N, P, K, S, Zn and B respectively. The varieties used were BARI Gom-26 for wheat, BU Mung-4 for mungbean and BRRI dhan57 for T.aman. Soil and plant samples were collected and analyzed. Application of lime, P and K significantly increased the growth and yield contributing characters, grain and straw yields of all crops irrespective of patterns at both locations. The direct and residual effects of lime were more prominent on crop yields followed by K and then P. The performance of different treatments was better at HSTU farm than Farmer’s field (FF). The yield of L1PK treatment was the highest; which was followed by L2PK for all crops and locations. In general, the crop yields of FF were relatively low due to higher acidity. The total uptake of P by crops was lower than the applied amount but the uptake of K was much higher than the added amount. The uptake of N, S, Fe, Mn, Zn and B were increased with the increase in yield due to different treatments. Soil pH was increased by 0.4-1.21 units irrespective of location and the higher values were observed with higher rates of lime application. The available P was increased in P treated plot and decreased in P control plot. The status of exchangeable K remained almost unchanged in treated plot but decrease in control plot. The status of available Zn, B, Fe and Mn were decreased over initial status but the status of total N and available S remained almost unchanged due to cropping and fertilization. The highest gross margin and BCR was found due to L1PK treatment for all crops and locations and this was followed by L2PK. Wheat-Mungbeam-T.aman cropping pattern was found more profitable than Wheat-fallow-T.aman cropping pattern. Economic analysis also showed dominance of 1 t ha-1 lime with P and K (L1PK) treatment combinations than others. This study recommends that amendment of soil with lime (dolomite) @ 1 t ha-1 with PK fertilizer inclusion of legume crop in cropping pattern might be an efficient practice for achieving sustainable soil fertility and crop yield in Old Himalayan Piedmont Plain (AEZ-1) and North Eastern Barind Tract (AEZ-27) soils of Bangladesh. EFFECTS OF LIME, PHOSPHORUS AND POTASSIUM ON CROP YIELDS OF DIFFERENT CROPPING PATTERNS IN ACID SOILS; A Dissertation Submitted in accordance with the requirements of the Hajee Mohammad Danesh Science and Technology University, Dinajpur for the degree of DOCTOR OF PHILOSOPHY By MD. SADEQUL ISLAM, Reg. No. 1105046, Year 2011, Department of Soil Science, Hajee Mohammad Danesh Science and Technology University, Dinajpur; May 2016.

2016-05-01T00:00:00Z KHAN , M. SHAHADAT HOSSAIN http://103.7.193.12:8080/xmlui/handle/123456789/1876 2022-05-18T07:53:54Z 2009-03-01T00:00:00Z

CLARIFICATION OF ALUMINUM TOLERANCE MECHANISMS WITH SPECIAL INTEREST IN THE PLASMA MEMBRANE LIPID LAYER OF ROOT-TIP PORTION MAINLY OF RICE KHAN , M. SHAHADAT HOSSAIN CLARIFICATION OF ALUMINUM TOLERANCE MECHANISMS WITH SPECIAL INTEREST IN THE PLASMA MEMBRANE LIPID LAYER OF ROOT-TIP PORTION MAINLY OF RICE A Dissertation Submitted to The United Graduate School of Agricultural Sciences Iwate University In Partial Fulfillment of Requirement for the Degree of Doctor of Philosophy By M. SHAHADAT HOSSAIN KHAN The United Graduate School of Agricultural Sciences, Iwate University Science of Biotic Environment Faculty of Agriculture Yamagata University Japan March, 2009

2009-03-01T00:00:00Z RAHMAN, MD. MANSUR http://103.7.193.12:8080/xmlui/handle/123456789/784 2022-04-24T07:16:30Z 2014-01-01T00:00:00Z

EFFECT OF ORGANIC AND INORGANIC FERTILIZERS ON AZOTOBACTER AND CYANOBACTERIAL POPULATION AND RICE CROP IN PIEDMONT SOIL RAHMAN, MD. MANSUR A study was undertaken to evaluate the combined effects of organic and inorganic fertilizers on the indigenous Azotobacter and cyanobacterial population in soil and on the growth and yield of rice for the Boro-fallow-T. aman rice cropping pattern. The study was carried out both at the field and the laboratory of the Department of Soil Science, Hajee Mohammad Danesh Science and Technology University, Dinajpur. In the field experiment, BRRI dhan28 (boro) and Kataribhog (aman) were grown following the rice-rice cropping pattern in the two consecutive years of 2009 and 2010 in Piedmont soil (AEZ#1). The study was initiated in November 2008 and was continued up to January 2011 to complete two crop cycles with boro rice (BRRI dhan28) as the first crop and T. aman rice (Kataribhog) as the second crop in each cycle. The experiment was laid out in the randomized complete block design (RCBD) with eleven treatments having three replications. The 11 treatment combinations consisting of N, P, K, S, Zn, cowdung (CD), poultry manure (PM) and mustard oil cake (MOC) including one control treatment were as follows- To : Control, T; : 100 % RFD on the soil test basis, T, : 75% RFD+25% CD, T3 : 50% RFD+50% CD, Ty : 75% RFD+25% PM, Ts; : 50% RFD+50% PM, Ts : 75% RFD+25% MOC, T; : 50% RFD+50% MOC, Ts : 75% RFD+25 % (CD, PM, MOC), Ty : 50% RFD+50% (CD, PM, MOC) and Tio : 34% CD + 33% PM + 33% MOC. Data were recorded on yields, yield components and N, P, K and S contents and uptake by the grain and straw of rice. In the laboratory indigenous cyanobacterial and Azotobacter population in soil under study were determined before transplantation, 30 and 60 days after transplanting (DAT) and after harvest of rice crops. Soil organic matter status, total N, available P, S and exchangeable K of soil were also determined at 30 and 60 DAT and after harvest of rice crop to assess the nutrient dynamics due to impose of different treatments. The results of the present investigation indicated that integration of organic and inorganic fertilizers significantly influenced the yield and yield components of rice, indigenous cyanobacterial and Azotobacter population in soil and soil chemical properties. Results showed that the highest grain yields of boro rice of 6.09 and 5.75 and those of straw of 6.86 and 7.65 t ha’! were recorded in treatment Ts having 75% chemical fertilizer and 25% organic manures during boro seasons of 2009 and 2010, respectively. The lowest grain yields of 3.15 and 2.82 and those of straw yields of 3.88 and 3.37t ha were recorded in T, during 2009 and 2010, respectively. The highest grain yields of T. aman rice of 5.40 and 4.90 and those of straw yields of 10.21 and 11.21t ha’! were recorded in Ts during T. aman seasons of 2009 and 2010 respectively. The lowest grain yields of T. aman rice of 2.78 and 2.28 and those of straw yields of 4.67 and 5.67t ha’! were found in T, during 2009 and 2010, respectively. The yield components viz. plant height, tillers hill’, panicle length, grains panicle’ and 1000 grain weight were significantly affected by the treatments and the maximum values were recorded in treatment Ts. The highest N, P, K and S contents and uptake by rice were recorded in treatment Ts. Cyanobacterial and Azotobacter population was significantly affected by the treatments. Higher cyanobacterial population was recorded in 2010 than those were observed in 2009. On the contrary, cyanobacterial population was higher in boro season than those were recorded in T. aman season of the same year. Similar pattern of Azotobacter popular was recorded during the entire period but the population was higher in boro season than those of T. aman season. Soil organic matter and nutrient status such as total N, available P, S and exchangeable K were slightly increased due to experimentation. From the overall results, it can be concluded that integration of organic and inorganic fertilizers can save 25% chemical fertilizer without any yield decline. Rice (Oryza sativa L.) is the staple food of over 40% of the world’s population making it the most important food crop currently produced (Hossain and Fischer, 1995). It is the major food for over two billion Asian people and for hundreds of million in Africa and Latin America. Among the rice growing countries, Bangladesh ranks third in area and fourth in production (Islam and Diamond, 2000). Here about 26.62 million acres were used for its cultivation where 25.19 million m tons of rice were harvested during 2002-2003 (BBS, 2004). Of the total rice production in the country, about 49% comes from boro and the rest 44 and 7% from aman and aus, respectively (BBS, 2004). Unfortunately, her average rice yield is less compared to agriculturally advanced rice growing other countries like China, Japan, Korean Republic and the USA (FAO, 2001).

2014-01-01T00:00:00Z