Browsing by Author "RAHMAN, ABDUR"

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ASSESSING RESILIENCE IN SEED SYSTEM OF NARSINGDI DISTRICT
(DEPT. OF AGRICULTURAL EXTENSION & INFORMATION SYSTEM, 2016) RAHMAN, ABDUR
Resilient seed system is essential for achieving food security in the context of climate change. The main objectives of the study were to develop a set of indicators and to assess resilience in seed system (i.e., production and processing).The study was conducted in three villages of Shibpur Upazilla of Narsingdi district. Data were collected from a sample of randomly selected 110 farmers by using a structured interview schedule. Resilience of seed system was assessed by developing a resilience index. This study was adapted a resilience assessment framework (dimension X capacity) proposed by the German Corporation for International Cooperation (GIZ). Data quality was checked through employing data screening tests, e.g., dealing with outliers. Based on literature review and expert appraisals nine indicators of resilient seed systems were determined. Results show that (i) in terms of social, economic and ecological dimensions, about 66% seed producers had medium to high resilient seed systems; (ii) they had more adaptive capacity than absorptive and transformative; and (iii) a number of indicators, access to information, non-farm income generating activities and pest and disease management had positive and highly significant relationships with the seed systems resilience index. This study concludes that (one-third of) seed growers were facing climatic challenges and a range of options such as improving access to climatic information and promoting nonfarm income generation activities can build their resilient seed systems through improving absorptive and transformative capacities. Several problems were identified in achieving seed system resilient.
EFFECT OF FERTILIZER AND MANURE WITH LIME ON THE CHANGE OF pH AND NUTRIENT AVAILABILITY AND YIELD OF T. AMAN RICE IN TWO ACIDIC SOIL
(Department of Soil Science, 2014-12) RAHMAN, ABDUR
The experiment was conducted on the net house at Soil Science Department of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during the period from June to November 2014 in aman season to find out the effect of fertilizer, manure and lime on the nutrient availability and yield of T. Aman rice in different soil. BRRI dhan33 was used as the test crop in this experiment. The experiment comprised of two factors- Factors A: Soils from 2 locations, S 1 : Bhatgaon, S : Goari 0 : Control condition i.e. no fertilizers and manures; T 6 2 1 : N 150 P 30 K 70 S 20 Zn 2 : N 150 P 30 K 70 S 20 Zn 3 -1 soil, T 3 : 50% NPKS + 5 ton cowdung ha -1 T 4 : 50% NPKS + 5 ton cowdung ha -1 + 1.0 g dolomite kg -1 , T 5 3 : 50% NPKS + 5 ton compost ha -1 , T 6 : 50% NPKS + 5 ton compost ha -1 + 1.0 g dolomite kg -1 , T : 50% NPKS + 3.5 ton poultry manure ha -1 and T 8 : 50% NPKS + 3.5 ton poultry manure ha -1 7 + 1.0 g dolomite kg -1 soil. The experiment was laid out in a randomized complete block design -1 and the lowest grain yield pot -1 2 . The highest pore-water P 1 , while the lowest 1 2 . The highest N, P and K concentration in grain 1 , whereas the lowest ( . The highest organic matter 1 , while the lowest . The highest pH 2 , while the lowest pH . The highest available P and K -1 1 1 . The highest total nitrogen 2 , while the lowest . For different fertilizers, manure & lime, the highest grain yield pot -1 8 1 while the lowest . The highest pore-water P and K concentration 8 and T 2 0 . The highest N, P, and K concentration in grain 8 , T 7 and T , respectively 0 . The highest pH 6 6 2 and the lowest pH . The organic matter, available P, available K and total N in soil increased with 2 , T 4 , T respectively -1 2 6 T , whereas the lowest 1 T . The highest N, P, and K concentration in grain 1 T 8 0 , S 1 T 7 and S 1 T , respectively, whereas the lowest 2 T 0 , S 2 T 1 and S 1 T 0 2 . The highest pH 2 T and the lowest pH 2 T 0 4 . The organic matter, available P and total N in soil increased with the application of soil and fertilizers, manure & lime. Goari soil and 50% NPKS + 3.5 ton poultry manure ha -1 and T 8 8, 0 + 1.0 g dolomite kg performed better in relation to yield contributing characters and yield of BRRI dhan33. The level of pH was more increased in the post experiment soil by Goari with 50% NPKS + 5 ton cowdung ha + 1.0 g dolomite kg -1 treatments. The level organic matter, available P and total N and K increased though application of inorganic fertilizers plus manure & lime soil.
STUDY ON ISOLATION, CHARACTERIZATION AND IDENTIFICATION OF LACTIC ACID BACTERIA DERIVED FROM FERMENTED DAIRY PRODUCTS
(DEPARTMENT OF DAIRY SCIENCE, 2022) RAHMAN, ABDUR
Lactic acid bacteria (LAB) are important in dairy food fermentation which have beneficial health properties. The research was conducted to isolate, characterize and identify the LAB derived from fermented dairy products like dahi, borhani, matha, lassi, cheese and to assess their antibiotic susceptibility patterns. The bacteria were isolated based on their colony morphology on de Man, Rogosa, and Sharpe (MRS) agar and selected based on gram-staining properties, biochemical properties and molecular tests. Salt tolerance, sugar fermentation and growth at different temperatures and salt concentrations were observed for all isolates. PCR followed by 16S rDNA sequencing was done to identify the bacteria. All isolates survived at low (≤5%) NaCl concentration, but could not tolerate high (≥6%) NaCl concentration. All isolates can ferment glucose, sucrose, and lactose. All the tested isolates were sensitive to antibiotics like gentamicin, ciprofloxacin, tetracycline and ceftriaxone. Finally, the identified bacterial species were Lactobacillus rhamnosus from dahi, lassi and matha samples and Lactobacillus fermentum was identified from the cheese sample which are known as probiotic species. Ultimately, the research revealed two antibiotic-sensitive LAB species suitable for incorporation into fermented dairy product formulations.