Browsing by Author "ZOHORA, FATEMA TUZ"

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    EFFECT OF AGRONOMIC MANAGEMENTS ON GROWTH AND YIELD OF MAIZE
    (DEPARTMENT OF AGRONOMY, 2020) ZOHORA, FATEMA TUZ
    An experiment was conducted at Sher-e-Bangla Agricultural University farm, Dhaka to investigate the effect of agronomic managements on growth and yield of two maize varieties during the period from November, 2018 to April, 2019. The experiment comprised as two factors having two varieties (V 1: Khoibhutta ; V 2 : BARI Hybrid Maize 9) in the main plots and seven agronomic managements (M 1: no management, M 2: no fertilizer application but all other managements, M 3: no weeding but all other managements, M 4: no irrigation but all other managements, M 5: no pesticides but all other managements, M 6: no earthing up but all other managements and M 7: all recommended management) in the sub-plots under split-plot design with three replications. The results indicated that plant height reduced by 63 %, 34.28 %, 15.26 %, and 9.97%, respectively for no management, no irrigation, no fertilizer application and no weeding than recommended management. More severity caused by them was found on yield parameters. Among all the treatment combinations, the highest yield (12.60 t ha -1 ) was recorded from BARI Hybrid Maize 9 treated with all recommended management and in case of Khoibhutta. The highest yield was recorded (5.03 t ha ) when remained under proper management. The highest yield reduction in BARI Hybrid Maize 9 was 91.32 % in no management that followed by 41.93 %, 41.19 %, 10.36 %, 6.16 % and 4.72 %, respectively for no fertilizer application, no irrigation, no weeding, no earthing up and no pesticides, whereas for the other variety Khoibhutta yield reduction was 89.63 % for no management, followed by 55.26 %, 36.37 %, 22.46 %, 10.32 % and 4.11 % for no irrigation, no fertilizer application, no weeding, no earthing up and no pesticides. Regarding variety, BARI Hybrid Maize 9 showed 161.37 % higher yield capacity over Khoibhutta because of its genetic potentiality. However, irrespective of variety, no management reduced 86% grain yield of maize that was 45.21 %, 40.34 %, 13.92 %, 7.35 % and 4.55 %, respectively, for no irrigation, no fertilizer application, no weeding, no earthing up and no pesticides. All over damage caused by pest was recorded less in this experiment as pest visibility was not there as much high.
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    GENETIC ANALYSIS OF MORPHOLOGICAL PARAMETERS IN OIL SEED BrassicaGENOTYPES
    (DEPARTMENT OF GENETICS AND PLANT BREEDING, 2022) ZOHORA, FATEMA TUZ
    The investigation was started with the selection process of potential populations of Brassica rapa L. The present investigation was carried out under field conditions to evaluate morphologicaltraits of 13 genotypes received from the Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University, Dhaka, considering 13traits, using randomized complete block design with three replications during rabi season from November 2020 to February 2021 in research farm of Sher-eBangla Agricultural University, Dhaka. The analysis of variance showed significant variation in all the traits. The phenotypic variances were higher than genotypic variances with little differences in all traits. High heritability estimates were observed for days to 50% flowering, days to maturity, number of secondary branches per plant, number of siliquae per plant, length of siliqua, number of seeds per siliqua and yield per plant. Correlation study revealed that seed yield per plant had a highly significant positive correlation with number of secondary branches per plant, length of siliqua, number of siliquae per plant and thousand seed weight at both genotypic and phenotypic level, while days to first flowering, days to 50% flowering and days to 80% maturity showed significant negative correlation with yield at both phenotypic and genotypic level. Path coefficient analysis found that number of secondary branches per plant had the highest positive direct effect followed by plant eight, root length,thousand seed weight and days to 80% maturity had medium level direct effects towards yield, while days to first flowering, days to 50% flowering, shoot length, number of primary branches per plant, number of siliquae per seed, length of siliqua and number of siliquae per plant had negative direct effects.Plant height exhibited lowest (76.15 cm) in G1. The highest number of primary branches per plant (5.80) was recorded in G9. The highest number of secondary branches per plant (6.13) was observed in G6. The highest number of siliquae per plant (155.53) was in G6, the number of seeds per siliqua (24.09) was found highest in G10. The thousand seed weight exhibited the highest (2.82 g) in G10 followed by G6 (2.74 g). The yield per plant was maximum (6.92 g) in G10.Considering the morphological and genetical parameters, the genotypes G1, G6, G9, G10 could be considered as a potential parent for future breeding program.