Browsing by Author "HASANUZZAMAN, MD."

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INFLUENCE OF NITROGEN AND PHOSPHORUS ON GROWTH AND YIELD OF HYBRID RICE
(DEPARTMENT OF AGRONOMY, 2010-06) HASANUZZAMAN, MD.
The Experiment was carried out at Sher-e-Bangla Agricultural University, Dhaka during the period of November, 2010 to May 2011 to study the influence of levels of nitrogen and phosphorus on the growth and yield of hybrid Heera1. The experiment was laid out on split plot design with three replications having nitrogen fertilizer in the main plot and phosphorus fertilizer in the sub plot. There were six nitrogen fertilizer levels viz., N =no nitrogen, N 1 =80 kg N ha -1 , N 2 =urea supergranules (2.7 g) @ 75 kg N ha -1 0 ), N =120 kg N ha -1 , N 4 =160 kg N ha -1 , N 5 =200 kg N ha -1 and four phosphorus fertilizer levels viz., P 0 =no phosphorus, P 1 =30 kg P 2 O 5 ha -1 , P 2 =50 kg P 2 O 5 ha =70 kg P 2 O 5 ha -1 . Urea was top dressed in three equal splits at 10, 35 and 55 DAT. The USG (2.7 g) was placed at 5-10 cm soil depth at 10 DAT in the centre of four hills in alternate rows @ 1 granule in one spot to supply 75 kg N ha . Results indicated that the effect of nitrogen showed significant variation in respect of all growth, yield contributing characters and yield. At harvest, highest plant height (96.74 cm), tillers hill -1 (14.22), LAI (7.72), total dry matter (66.26 g), effective tillers hill -1 -1 3 and P (13.63), panicle length (24.29 cm), filled grains panicle (154.67), total grains panicle -1 (159.20), 1000 grain weight (29.35 g), grain yield ( 9.42 t ha -1 ), straw yield (13.33 t ha -1 ), biological yield (22.75 t ha ) was obtained from the application of USG. About 10% more grain yield was measured from USG than PU. Phosphorus @ 50 kg P 2 O gave the highest grain yield (7.85 t ha -1 5 ). Interaction effect showed that application of USG along with -1 3 -1 -1 50 kg P 2 O 5 ha -1 gave the highest (9.83 t ha -1 ) grain yield. On the other hand application of 160 kg N ha -1 and 120 kg N ha -1 along with 50 kg P gave similar grain yield as 8.83 t ha -1 and 7.67 t ha -1 , respectively. 2 O 5 ha -1
INHERITANCE OF QUANTITATIVE CHARACTERS IN CHILLI (Capsicum annuum L.)
(HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR., 2010-10) HASANUZZAMAN, MD.; Professor Dr. Lutfur Rahman
The present research program was undertaken to study the inheritance of quantitative characters related to yield in chilli (Capsicum annuum L.). The experiment was conducted at R & D Farm, Lal Teer Seed Limited, Gazipur, Bangladesh. Detailed gene actions in association with combining ability, heterosis, heritability and path analysis were studied. Based on the degree of divergence among genotypes, the 20 accessions, CCA 1, CCA 2, CCA 3, CCA 4, CCA 5, CCA 6, CCA 7, BARI Morich 1, CCA 9, CCA 10, CCA 11, CCA 12, CCA 13, CCA 14, CCA 15, CCA 16, CCA 17, CCA 18, CCA 19 and CCA 20 could be grouped into six clusters. Six different homozygous divergent parents CCA 2, CCA 5, BARI Morich 1, CCA 11, CCA 15 and CCA 19 were selected for 6X6 diallel cross excluding reciprocals from six different clusters using ranking among genotypes within cluster. Yield per plant, at phenotypic and genotypic level, was significantly and positively correlated with fruit length, fruit weight and number of fruits per plant and days to fruit maturity (green). The direct effect of number of fruits per plant was very close to correlation value at phenotypic and genotypic level. Selection should be done through number of fruits per plant. GCA variance was significant for all the traits and significant SCA variance was observed for all the measured variables except fruit width. Both additive and non-additive effects influence the performance of the hybrid in all the traits. The non-additive effects played a more important role than additive effects. The parents CCA 5, BARI Morich 1 and CCA 19 were found good general combiners. Considering the SCA effects and mean performance, hybrids 36 and 23 were best and showed better performance in average and standard heterosis. Top two yield per plant were obtained in hybrids 36 (898.87g) and 23 (833.63g). Indigenous X exotic crosses showed significant heterobeltiosis. Broad sense heritability of all the 11 characters was above 90% indicating highly heritable. Narrow sense heritability of days to 50% flowering, fruit length, fruit width, fruit weight, days to fruit maturity (green), days to maturity (ripe), plant height, plant canopy width were high and number of seeds per plant, number of fruits per plant, yield per plant were medium according to classification of Robinson (1965). Estimates of heritability by mid parent-offspring regression indicated that all the characters were highly heritable. Gene action for yield and yield contributing traits were studied in four selected crosses, involving five parents including their F;'s, F's and first back crosses generations in this work. The significant scaling tests (one or more scales in A, B and C) and joint scaling test indicated the presence of digenic epistasis for all the traits studied. Number of fruits per plant and yield per plant were controlled by additive, dominance and epistatic gene action. Determination of transgressive segregation and more comprehensive understanding of generation means can be visually gained by developing boxplot. Desirable transgressive segregants were found in all traits except days to flowering. The number of effective gene was one in all the eleven traits in all four crosses, which was underestimated in presence of epistasis. In general, the modified bulk method, reciprocal recurrent selection, diallel selective mating system, biparental mating system and heterosis breeding are recommended for yield improvement in chilli.
LABORATORY EVALUATION OF THREE INDIGENOUS PLANT EXTRACTS AGAINST RICE WEEVIL, SITOPHILUS ORYZAE L. (COLEOPTERA: CURCULIONIDAE)
(HAJEE MOHAMMOD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR, 2018-06) HASANUZZAMAN, MD.; Prof. Dr. Roushan Ara
The study was conducted to evaluate the efficacy of three indigenous leaf extracts viz. Ata (Annona reticulata), marigold (Tagetes erecta) and karobi (Nerium oleander) extracts for their toxic, repellent and residual effect against adult rice weevil (Sitophilus oryzae) under laboratory condition in the Department of Entomology, Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur during June to October 2017. These botanicals were applied at four doses (10 mg/ml, 7.5mg/ml,5mg/ml/ and 2.5mg/ml) along with control and replicated three times. The results of the present study revealed that all the leaf extracts had toxic effect on rice weevil. The mortality was maximum in ata (45.56%) followed by marigold (40.89%) and karobi (21.11%). Mortality percentage was also found directly proportional to the level of concentrations of leaf extracts and to the exposure period. The order of toxicity level of leaf extracts were found as ata >marigold >karobi. All the leaf extracts had moderate repellent action on rice weevil where ata leaf extract showed the highest mean repellency (55.00 %) followed by marigold (49.33 %) and karobi ( 44.67%). On the basis of repellency class, it was found that all the plants were in the same repellency class i.e. class III. Among the tested leaf extracts, ata showed the lowest number (14.92%) of F1 progeny production with lowest weight loss (16.18 %) whereas the highest number (45.56 %) of F1 progeny production with highest weight loss (45.33%) in the control treatment. The findings of the current study indicated that ata leaf extracts was more effective against rice weevil compared to the other two extracts.