http://localhost:8080/handle/123456789/2821 Sat, 18 Apr 2026 14:12:51 GMT 2026-04-18T14:12:51Z http://localhost:8080/handle/123456789/2933 INFLUENCE OF SOWING TIME AND PHOSPHORUS ON THE GROWTH AND YIELD PERFORMANCE OF CUCUMBER AKTER, SUFIA The study was conducted at the Horticultural Farm of Sher-e-Bangla Agricultural University, Dhaka during the period from March to July, 2013. The experiment consisted with two factors. Factor A: Sowing time 1 : Sowing on 20 March, T 2 : 5 April, T : 20 April, T 4 : 5 May and also Factor B: Phosphorus 0 : 0 kg P 2 O 5 /ha : 30 kg P 2 O 5 /ha, P 2 : 60 kg P 2 O 5 /ha and P 3 : 90 kg P 2 O /ha. The present study was laid out in a Randomized Complete Block Design ( 2 5 treatment, whereas the lowest was recorded from T treatment. On the other hand, the maximum number of fruits per plant treatment, while the lowest was recorded from P 0 2 2 P 2 , while the lowest were treatment combination, respectively. The highest benefit cost ratio 2 P 2 and the lowest 4 P treatment combination. In the present study, combination of T 2 P 2 0 showed more profitable than rest of the combinations in cucumber cultivation. 4 3 1 4 P 0 A Thesis Submitted to the Faculty of Agriculture Sher-e-Bangla Agricultural University, Dhaka in partial fulfilment of the requirements for the degree of MASTER OF SCIENCE HORTICULTURE SEMESTER: JULY-DECEMBER, 2014 Mon, 01 Dec 2014 00:00:00 GMT http://localhost:8080/handle/123456789/2933 2014-12-01T00:00:00Z http://localhost:8080/handle/123456789/2932 ASSESSMENT OF SALINITY TOLERANCE CAPACITY OF PROMISING TOMATO GENOTYPES MONIRUZZAMAN, MOHAMMED An experiment on tomato was conducted at the Net House Premises of Soil Science Division, Bangladesh Agricultural Research Institute; Gazipur during the winter season from Nov.2013 - Feb. 2014. The major objective of the study was to assess the salinity tolerance ability of promising tomato genotypes for the identification of salt tolerant ones. Six levels -1 2 3 1 3 gave the highest fruit yield equivalent to 55.25 t ha -1 2 concentration was highest for the V as 14.56, 3.09, 0.25 and 199.75 mol m -2 s -1 , respectively. Potassium: sodium ratio for V 3 1 , V 2 and V was 3.43, 3.55 and 3.72, respectively, which indicates their adaptability under salt stressed situation to a considerable extent, where the performance of V 3 3 was slightly better over other two varieties. Increasing levels of salinity resulted in lower SPAD values in leaves regardless of genotype. Photosynthetic rate, transpiration rate, intercellular CO concentration showed significant negative linear relationships with electrical conductivity of the irrigation water. Sodium salt stress showed antagonistic effect on the absorption N, P, K, Mg and S while it was synergistic for Ca although root Ca concentration showed declining trend. Considering all studied traits and yield potentiality, BARI hybrid tomato 8 can be regarded as salt tolerant to some extent. -1 2 A Thesis Submitted to the Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka In partial fulfillment of the requirements for the degree of MASTER OF SCIENCE HORTICULTURE SEMESTER: JULY - DECEMBER, 2014 Mon, 01 Dec 2014 00:00:00 GMT http://localhost:8080/handle/123456789/2932 2014-12-01T00:00:00Z http://localhost:8080/handle/123456789/2931 EFFECT OF SPERMIDINE ON PHYSIOLOGY AND ANTIOXIDANTS UNDER SALINITY STRESS IN ONION SEEDLINGS ISLAM, TANJINA In this study, protective role of spermidine (Spd) on NaCl induced oxidative damage in onion seedlings was investigated for better understanding the salinity tolerance mechanism. Onion seedlings were subjected to salinity stress of 16 dSm -1 and 100 µM of Spd were sprayed twice daily. Data were analyzed on Chlorophyll (Chl), Carotenoid (Car), Leaf water, Proline, Reactive Oxygen Species (ROS), Methylglyoxal (MG), lipid peroxidation as Malondialdehyde (MDA), Polyamines, Glutathione and Ascobate related antioxidant enzymes and Glyoxalase (Gly) systems. Salinity reduced the Chl, Car and Relative Water Content (RWC) of leaves where foliar spray of Spd reduced the loss of these contents. Contrary, Spd increased the proline contents in salinity stressed seedlings. The contents of O 2 •- , H 2 O 2, MDA were decreased in the Spd supplied leaves. However, Spd effectively maintained the ROS and MDA at first 3 day of stress, while Glutathion (GSH), Ascorbic acid (ASA) and their redox homeostasis were maintained higher throughout the study period. Higher increments of Polyamine Oxidase (PAO) and Diamine Oxidase (DAO) activities upto 3 day suggested its protective role via H 2 O 2 signal transduction pathway. In presence of Spd, higher activities of superoxide dismutase (SOD), Ascorbate Peroxidase (APX) and Monodehydroascorbate reductase (MDHAR) over salinity during the study period suggested its ROS scavenging role. However, higher activities of Glutathione Peroxidase (GPX) and Dehydroascorbatereductase (DHAR) by Spd indicated maintenance of ROS and ASA, respectively. Similarly, Spd increased activities of Gly-I and Gly-II upto 3 day of stress concurrently with lower MG suggested the improvement of MG detoxification system. Higher activity of Glutathione-S-Transferase (GST) by Spd in saline stress seedling might involve in protein stabilization and detoxification role in onion plant. Since GST activity increased strongly in presence or absence of Spd under salinity, attempt was taken to test its accumulation. Therefore, from different plant parts it was found that both root and bulb showed higher GST activity. However, onion bulb was chosen for easy availability. In chromatographic separation of onion bulb, three component GSTs were separated among which one GST eluted at 120 mM KCl was found to be accumulated under salinity in western blotting analysis. Taken together, in short term salinity, foliar spray of Spd might be useful to reduce the oxidative damage through increment of antioxidants and glyoxalase system. A Thesis Submitted to the Department of Horticulture Sher-e-Bangla Agricultural University, Dhaka In partial fulfillment of the requirements for the degree of MASTER OF SCIENCE (MS) IN HORTICULTURE SEMESTER: JULY-DECEMBER, 2014 Mon, 01 Dec 2014 00:00:00 GMT http://localhost:8080/handle/123456789/2931 2014-12-01T00:00:00Z http://localhost:8080/handle/123456789/2930 EFFECT OF BULB SIZE AND DEPTH OF PLANTING ON GROWTH, FLOWERING AND YIELD OF TUBEROSE SULTANA, SHABIHA The study was conducted at the Horticultural Farm of Sher-e-Bangla Agricultural University, Dhaka during the period from April 2013 to February 2014.The experiment consisted of two factors. Factor A: Three levels of bulb size: B 1 -Small size, B 2 -Medium size, B -Large size and Factor B: Three levels of depth of planting: D 1 -3cm, D 2 3 -5cm and D -7cm respectively.The experiment was laid out in a Randomized Complete Block Design with three replications. Bulb size and depth of planting showed significant variations on most of the parameters. In case of bulb size highest yield of spike 3 3 and the lowest spike . In case of depth of planting, the highest yield of spike 1 and lowest spike 1 2 . For combined effect highest yield of spike and the lowest spike 1 D . The highest benefit cost ratio ( 3 D 2 1 3 D and lowest . So large size bulb planting in 5cm depth was found best for growth, flowering and yield of tuberose. 2 1 D 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) HORTICULTURE SEMESTER: JULY-DECEMBER, 2014 Mon, 01 Dec 2014 00:00:00 GMT http://localhost:8080/handle/123456789/2930 2014-12-01T00:00:00Z