http://localhost:8080/handle/123456789/2671 2026-04-18T12:37:17Z http://localhost:8080/handle/123456789/1335 Role of chitosan powder on the production of quality seedlings of BRRI dhan29 and its effect on yield ISLAM, MD. SAIFUL Role of chitosan powder on the production of quality Boro rice seedlings and its effect on yield was examined. The experiment was conducted at the farm of Sher-e-Bangla Agricultural University, Dhaka. There were six treatments and three replications in the experiment. The treatments were as follows: T 1 = 100 g powder/m 2 , T 2 = 200 g powder/m , T 3 = 300 g powder/m 2 , T 4 = 400 g powder/m 2 , T 5 = 500 g powder/m 2 , T 6 = 0 g powder/m . A significant variation was observed in the seedlings height, biomass production and chemical properties of the seedbed soils due to the application of chitosan powder in the seedbed. The maximum seedlings height, fresh weight, oven dry weight were observed in the treatment T and the minimum seedlings height, fresh weight and oven dry weight were recorded in the treatment T , control. Whereas, the maximum level of organic carbon, organic matter and soil pH were recorded in the treatment T 6 and the minimum level of organic carbon, organic matter and soil pH were recorded in the treatment T 5 , control. Chitosan powder increased the level of organic matter in a dose dependent manner. Quality of the rice seedlings were improved due to the application of the chitosan powder in a dose dependent manner and the treatment T 4 (400 g powder/m 2 6 ) was the more effective than other treatments. All the treatments were produced good rice seedlings having more chlorophyll level than control treatments. Application of chitosan increased plant height, effective tillers hill , number of panicle/m 2 , panicle length, grain yield and straw yield over control. Most of the morphological, yield attributes and grain yield were increased with increasing the dose of chitosan in the seedbed. Maximum grain yield was observed in T 4 -1 treatment followed by T , T 5 , T 2 ,T 1 and T (control). Results indicate that primary tiller production become earlier, effective tiller become higher, flowering and maturity time become earlier resulting higher yield. These results might be due some growth promoting hormones (especially GA3, Auxin etc.), soil alkalization nature and other some macro-micro nutritional supplementation which might be induced some early flowering genes (ELF1, ELF2, ELF3). 6 2 2 4 3 A Thesis Submitted to the Department of Soil Science Sher-e-Bangla Agricultural University, Dhaka, In partial fulfillment of the requirements For the degree of MASTER OF SCIENCE (M.S.) IN SOIL SCIENCE SEMESTER: JULY-DECEMBER, 2016 2016-01-01T00:00:00Z http://localhost:8080/handle/123456789/1334 RESIDUAL EFFECT OF MODIFIED CHITOSAN POWDER ON THE NITROGEN MANAGEMENT OF BORO RICE KAMRUZZAMAN, MD. The experiments were carried out at the research field of Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh during the Boro season (November to May, 2016) to investigate residual effect of modified chitosan (CHT) powder on nitrogen management and yield performance of Boro rice. Two individual field experiments were done using two individual rice variety i.e. BRRI dhan28 and BRRI dhan29. The experiments were laid out in randomized complete block design (RCBD) with four replications. The experiments were comprised of five treatments having four levels of modified CHT powder. The treatments were T = Modified CHT powder @ 0.5 t/ha (applied in the previous experiment) + 2/3 rd 1 N of the recommended dose (RD), T =Modified CHT powder @ 1.0 t/ha (applied in the previous experiment) + 2/3 N of the RD, T = Modified CHT powder @ 2.0 t/ha (applied in the previous experiment) + 2/3 rd 3 N of the RD, T = Modified CHT powder @ 4.0 t/ha(applied in the previous experiment) + 2/3 rd 4 N of the RD and T =Modified CHT powder @ 0 t/ha + recommended N (control). Yield and yield contributing characters responded positively with increasing the doses of CHT powder except the following characters i.e. plant height, panicle length, total number of grains/panicle, filled grains/panicle, unfilled grains/panicle. The grain yield significantly decreased in T 5 treatment (5.47 t/ha) compared to T 5 1 (6.50 t/ha) control treatment due to the lack of nitrogen. But T treatment shows statistically identical grain yield (6.44 t/ha) to the control treatment (6.50 t/ha) in T which indicates the supplementation of N occurs in higher dose of CHT powder in T 5 treatment. Similarly straw yield (7.50 t/ha), number of effective tillers/hill (17.22) as well as biological yield (13.94 t/ha) of T 4 treatment shows statistically identical compared to the T 5 4 control treatment. The value of pH (7.01), organic carbon content (0.72%), and highest organic matter content (1.23%) in post harvest soil obtained in T 4 treatment were significantly greater than the T control treatment. From these results it can be concluded that yield and yield contributing characters of rice and some chemical properties of soil were improved due to the residual effect of modified CHT powder Taken together, our results suggest that modified CHT powder have some positive residual effect on slow releasing nitrogen supplementation, soil organic carbon and soil pH. 5 rd 2 4 A thesis submitted to the faculty of agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE (MS) IN SOIL SCIENCE SEMESTER: JANUARY-JUNE, 2016 2016-12-01T00:00:00Z http://localhost:8080/handle/123456789/1333 VARIETAL PERFORMANCE OF BORO RICE UNDER INTEGRATED NUTRIENT MANAGEMENT SULTANA, NAHID The experiment was conducted at the farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, Bangladesh during the boro season from December 2015 to May 2016 to evaluate the yield performance of BRRI dhan63 and hybrid variety Heera 4 under Integrated Nutrient Management system and to identify the combined optimum level of vermicompost and nitrogenous fertilizer regarding better yield parameters of rice..The variety BRRI dhan63 and Heera 4 was used as the test crop.The experiment comprised of two factors as, Factor A: variety (2) BRRI dhan63 and Heera 4 and Factor B: combination of organic and inorganic fertilizer including five treatments viz. T 1 = control, T 2 = 140 kg N ha -1 from urea, T 3 =100 kg N ha -1 from urea + 40 kg N ha -1 supplemented by vermicompost, T 4 = 80 kg N ha -1 from Urea + 60 kg N ha -1 supplemented by vermicompost, T 5 =Full organic (140 kg N ha supplemented by vermicompost). Variety Heera 4 performed better than BRRI dhan63 regarding the plant height, panicle length,grain yield, straw yield and harvest index. In case of plant height, Heera4 was taller (87.47 cm) than BRRI dhan63 (83.53 cm). The longest paniclewas obtained fromHeera 4 (25.13cm) and lowest in BRRI dhan63 (23.53cm). Rest of the characters i.e no. of effective tillers plant -1 , no. of grains panicle -1 , and 1000 grain wt (g), showed insignificant result. From the studymore thousand-grain wt (26.87), highest yield of grain and straw (6.08 and 6.88 t ha -1 respectively) were obtained from the variety Heera 4 incomparison to BRRI dhan63 where BRRI dhan63 gave more effective tillers hill -1 (17.73) and highest number of grains panicle (96.20). From the study treatment T 3 (100 kg N ha -1 from urea + 40 kg N ha supplemented by vermicompost) showed the best performance at all the characters. The tallest plant (87.83 cm), longest panicle (24.83cm), more grains panicle -1 (104.20), highest weight of 1000 grain wt (26.50 g), highest yield of grain and straw (6.28 and 7.13 t ha -1 respectively) and highest HI (46.98%) were recorded in T 3 where above all characters were lowest in T (control). The combinations (Heera 4 x 100 kg N ha -1 from urea x 40 kg N ha 1 -1 supplemented by vermicompost) showed superior result among the whole characters of the study. So, it could be concluded that the cultivar Heera 4 applied with urea and vermicompost would be the suitable variety and optimum organic (vermicompost) + inorganic (urea) N combination, for getting the higher production. The above results also suggested that the application of organic fertilizer as vermicompost can reduce by 30% use of inorganic fertilizer and also reduce the soil pollution by chemical fertilizer and improve soil physical properties. -1 -1 -1 A Thesis Submitted to the Faculty of Agriculture Sher-e-Bangla Agricultural University, Dhaka in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE (MS) IN  SOIL SCIENCE SEMESTER: JULY-DECEMBER, 2016 2016-12-01T00:00:00Z http://localhost:8080/handle/123456789/1332 INFLUENCE OF NITROGEN AND SULPHUR ON THE GROWTH AND YIELD OF BRRI dhan63 IN BORO SEASON SAMIA, TABASSUM The  experiment  was  conducted  during  the  period  from  13 th December  2015  to  May  2016atboro  season  in  the  research  farm  of  Sher‐e‐Bangla  Agricultural  University,  Sher‐e‐ Bangla  Nagar,  Dhaka,  Bangladesh  to  find  out  the  effect  of  different  levels  nitrogen  and  sulphur  on  the  growth  and  yield  of  BRRI  dhan63.  As  planting  material  BRRI  dhan63  also  known  as  ‘Soru  balam’   was  used.  The  experiment  was  comprised  of  two  factors  as  Factor  A:  Levels  of  N  (3  levels)‐ N 0 :  0  kg  N  ha ‐1 (control),  N 1 :  100  kg  N  ha ‐1 ,  N 2 :  140  kg  N  ha   and  Factor  B:  Levels  of  S  (3  levels)‐  S 0 :  0  kg  S  ha ‐1 (control),  S 1 :  10  kg  S  ha ‐1 ,  S 2 ‐1 :  15  kg  N  ha .The  experiment  was  laid  out  in  a  randomized  complete  block  design  (RCBD)  with  three  replications.Data  were  recorded  on  different  growth  and  yield  attributes  and  nutrient  status  of post‐harvest  soil and  significant variation was observed  for different  treatment. In case of  nitrogen,  at  30,  50,  70,  90  DAT  and  harvest,  the   tallest  plant  (39.89,  59.45,  77.45,  85.74  and  89.93  cm,  respectively)  was  recorded  from  N ,  whereas  the  shortest  plant  (34.89,  54.64,  72.30,  80.11  and  80.68  cm,  respectively)  was  found  from  N 1 .  The  highest  grain  yield  (5.48  t  ha ‐1 ) was found from N 1 , while the lowest grain yield (4.46 t ha 0 ‐1 ) was observed from N . The  highest  total  nitrogen  (0.053%)  was  found  from  N ,  while  the  lowest  (0.013%)  was  observed  from  N 0 1 .The  highest  available  S  (22.05  ppm)  was  found  from  N ,  while  the  lowest  (19.57  ppm)  was  observed  from  N 0 1 .  For  sulphur,  at  30,  50,  70,  90  DAT  and  harvest,  the  tallest  plant  (39.90,  59.62,  76.88,  85.36  and  91.85  cm,  respectively)  was  observed  from  S ,  while  the  shortest  plant  (34.88,  54.39,  72.40,  75.26  and  77.35  cm,  respectively)  was  observed  from  S .  The  highest  grain  yield  (5.37  t  ha ‐1 )  was  recorded  from  S ,  whereas  the  lowest  grain  yield  (4.35 t ha ‐1 ) was observed from S 0 2 .The highest  straw yield (6.80  t ha ‐1 2 ) was recorded from S ,  whereas  the  lowest  straw  yield  (6.01  t  ha ‐1 )  was  observed  from  S .The  highest  total  nitrogen  (0.045%) was recorded from S 2 0 , whereas the  lowest (0.032%)  was  found  from  S .The highest  available  S  (22.70  ppm)  was  recorded  from  S ,  whereas  the  lowest  (18.76  ppm)  was  found  from  S 0 2 .  Due  to  the  interaction  effect  of  nitrogen  and  sulphur,  at  30,  50,  70,  90  DAT  and  harvest,  the  tallest  plant  (42.99,  63.52,  80.38,  87.85  and  99.44  cm,  respectively)  was  observed  from  N 1 S   and  the  shortest  plant  (30.30,  51.70,  69.71,  72.46  and  73.68  cm,  respectively)  was  recorded  from  N 2 0 S 0 .The  highest  grain  yield  (5.89  t  ha ‐1 )  was  found  from  N 1 S 2 ,  while  the  lowest  grain  yield  (4.13  t  ha ‐1 )  was  recorded  from  N 0 S .The  highest  straw  yield  (7.33  t  ha ‐1 )  was  found  from  N 1 S 2 0 ,  while  the  lowest  straw  yield  (5.88  t  ha )  was  recorded  from  N 0 S 0 .The  highest  total  nitrogen  (0.067%)  was  found  from  N ,  while  the  lowest  (0.008%)  was  observed  from  N 0 S .The  highest  available  S  (24.59  ppm)  was  found  from  N 2 S 2 0 ,  while  the  lowest  (16.99  ppm)  was  observed  from  N 0 S .It  was  revealed  that  application  of  100  kg  N  ha ‐1   and10  kg  S  ha ‐1 0   was  more  potential  in  regarding  yield  contributing characters and yield of BRRI dhan63.  1 0 S 1 ‐1 ‐1 0 0 2 A Thesis Submitted to the Faculty of Agriculture Sher-e-Bangla Agricultural University, Dhaka in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE (MS) IN  SOIL SCIENCE SEMESTER: JULY-DECEMBER, 2016 2016-12-01T00:00:00Z