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    EFFECT OF PRESERVATIVES ON VASE LIFE OF GLADIOLUS TUBEROSE AND GERBERA
    (DEPT. OF HORTICULTURE, 2009) HAWLADAR, MOHAMMAD YUSUF
    An experiment was conducted at the Laboratory of Landscape, Ornamental and Floriculture Division of Horticulture Research Centre, Bangladesh Agricultural Research Institute, Gazipur during the period from January 2009 to June 2009 to study the effect of different preservatives on postharvest life of gladiolus, tuberose and gerbera cut flowers. The study consisted of ten treatments- T1= 2% sucrose+ 100 ppm AgN03 + 25 ppm citric acid, T2= 2% sucrose+ 200 ppm AgN03 + 25 ppm citric acid, T3= 3% sucrose+ 100 ppm AgN03 + 25 ppm citric acid. T4= 3% sucrose+ 200 ppm AgN03 + 25 ppm citric acid. T5 = 4% sucrose + 100 ppm AgN03 + 25 ppm citric acid, T6 = 4% sucrose+ 200 ppm AgN03 + 25 ppm citric acid, T.,= 0.01 % sodium chloride. Tr 0.05 % sodium chloride.Te= 0.10 % sodium chloride and Tio= Control (tap water). Maximum vase life of 12 days was observed in gladiolus spikes held in solutions containing T3 which was closely similar (11 days) with those held in solution T4. In tuberose, the vase solution having a mixture of T2 significantly increased vase life, cumulative uptake of vase solution, fresh weight and number of opened florets compared to control and other treatments. It was found that in T1 and T2 treatment, tuberose flowers were more fragrant followed by other treatments T3, T4, Ts to T6 and Tio. No fragrance was found in T1, Ts and T9• A synergized effect of T6 proved effective in delaying the senescence of cut gerbera by increasing the water uptake and reducing the water loss thereby maintaining better water balance, leading to increased fresh weight and vase life.
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    EFFECT OF ROOTSTOCK AND METHOD OF GRAFTING ON THE SUCCESS AND GROWTH OF SWEET ORANGE (MALTA)
    (DEPT. OF HORTICULTURE, 2009) CHAKMA, REMI
    The experiment was conducted at the nursery of Hill Agricultural Research Station, Khagrachari from 14 August 2009 to February 2010 to find out the effect of rootstock and method of grafting on the success and growth of sweet orange (Malta). The experiment consisted of two factors. Factor A: Four rootstocks: R1: Rangpur lime; R2: Rough lemon; R3: Kalamansi and Ra: Pummelo. Factor B: Three methods of grafting: G1: Cleft grafting; G2: Veneer grafting and G3: Splice grafting. The two-factor experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. In case of rootstock the highest percentage of graft success (86.3%) was found from Ri, while the lowest (81.9%) was obtained from R3. The highest percentage of graft survivability (77.3%) was recorded from R2 and Rt, while the lowest (7 5 .1 % ) was observed from R3• In case of grafting the highest percentage of graft success (91.1%) was found from G1 and the lowest (76.7%) was found from 03• The highest percentage of graft survivability (83.0%) was found from 01 and the lowest (68.8%) was found from G3. For combined effect the highest percentage of graft success (94.2%) was observed from R2G1, whereas the lowest (74.2%) was recorded from R2G3• The highest percentage of graft survivability (87%) was observed from ~G1, whereas the lowest (66.0%) was recorded from R2G3• So, cleft grafting in rough lemon was found suitable for propagation of sweet orange.
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    EFFECT OF GROWTH CHEMICALS ON DIFFERENT VARIETIES OF GERBERA
    (DEPT. OF HORTICULTURE, 2009) SHAMMY, FARJANA HAQUE
    An experiment was conducted at Horticulture Farm, Sher-e-Bangla Agricultural University, Dhaka during the period from July, 2009 to April, 2010. The experiment consisted with two factors, Factor A: : control; F 1 : GA 3 ; F 2 : 4-CPA and F 3 : Flora : red colored flower and V : yellow colored flower 2 variety and maximum number of flower 1 2 but all other parameters were the lowest at V . For combined effect the highest peduncle length 1 2 F and maximum number of flower 1 F 2 2 and minimum 1 F . So plants of yellow colored flower treated with 4-CPA were more effective for quality production of gerbera.
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    EFF'ECT OF PHOSPHORUS AND PLANT SPACING ON THE GROWTH AND YIELD OF LETTUCE
    (DEPT. OF HORTICULTURE, 2009) ALAHI, ASHIK
    The experiment was conducted in the field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from November 2008 to February 2009 to find out the effect of phosphorus and plant spacing on the growth and yield of lettuce. The experiment consisted of two factors, such as factor A: 4 levels of phosphorus Po: 0 kg P20slha; P1: 24 kg P205/ha; P2: 48 kg P20s/ha and P3: 72 kg P20s/ha; factor B: 3 levels of plant spacing; S1: 40 x 20 c111, S2: 40 x 25 cm; S3: 40 x 30 cm. The experiment was laid out in a Randomized Complete Block Design with three replications. Data on growth, yield contributing characteristics and yield were recorded. At 30, 40, 50 and 60 DAT all the highest value of growth parameter and the yield per hectare (5.31 ton, 6.03 ton, 6.61 ton and 7.06 ton) was recorded from P3. At 30, 40, 50 and 60 DAT the tallest plant was recorded from S1, maximum number of leaves per plant was recorded from ,S2 and the highest yield per hectare ( 4.58 ton, 5.33 ton, 6.07 ton and '6.51 ton) was observed from S2. At 30, 40, 50 and 60 DAT highest value for plant height was recorded from P3S1 and maximum number of leaves per plant was found from the treatment combination of P3S2. The highest yield per hectare (5.95 ton, 6.49 ton, 7.26 ton and 7.68 ton) and the highest benefit cost ratio (2.,08) was recorded from P3S2 and the lowest was observed from P0S3 respectively. So the best results were obtained from the treatment receiving 72 kg P20sfha with plant spacing 40 x 25 cm.
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    EFFECT OF PHOSPHORUS AND BORON ON THE GROWTH AND YIELD OF CARROT
    (DEPT. OF HORTICULTURE, 2009) NAHAR, NURUN
    The experiment was conducted at the Horticultural Farm of Sher-e-Bangla Agricultural University, Dhaka, during the period from November 2008 to February 2009. The experiment consisted of two factors. Factor A: four levels of phosphorus viz., P 0 : 0 kg 1 : 50 kg, P respectively and Factor B: three levels of boron viz., B and B 2 : 2.0 kg H 3 BO 3 2 : 60 kg, and P 0 3 : 70 kg P : 0 kg /ha respectively. The experiment was laid out in Randomized Complete Block Design significant variation was observed in different parameters. For Phosphorus highest yield highest yield 3 and lowest 2 0 1 2 O 5 /ha : 1.5 kg, . For Boron and lowest combined effect highest yield t/ha) 0 B 2 . The highest benefit cost ratio was found in P 3 B Phosphorus with 2 kg Boron was found suitable for growth and yield of carrot. 2 0 . For and lowest 3 B 2 . So, 70 Kg
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    INFLUENCE OF PINCHING AND FOLIAR APPLICATION OF GROWTH CHEMICALS ON GROWTH AND YIELD OF CHRYSANTHEMUM
    (DEPT. OF HORTICULTURE, 2009) HABIBA, SULTANA UMMA
    An experiment was conducted at Horticulture Farm, Sher-e-Bangla Agricultural University, Dhaka during the period from October 2008 to March 2009. The experiment consisted with two factors; Factor A: pinching viz. P 5 0 : without pinching and P : with pinching and Factor B: foliar application of growth chemicals viz. F : Wuxol; F 2 : Vegimax, F 3 : Agro grow and F : Surgrow with 3 replications. In case of pinching the tallest plant 4 but maximum number of leaves per plant 0 and the shortest plant but minimum number of leaves 1 . For foliar application of growth chemicals the tallest plant 0 and the shortest plant 2 . In case of combined effect the maximum number of leaves per plant 1 F and all the above parameters were lowest with P 0 F 0 2 . So, pinching with vegimax was found suitable for growth and yield of chrysanthemum.