Year 2005
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Item EFFECT OF FERTILIZER MANAGEMENT AND MULCHING ON THE GROWTH AND YIELD OF LETTUCE(DEPARTMENT OF HORTICULTURE, 2005) ALI, MD. ARFANAn experiment was conducted at the Horticulture Farm of Sher-e-Bangla Agricultural University. Dhaka during the period from October 2004 to February 2005 to study the , . effect of different levels of fertilizer and manure viz. control. organic manure (23.11- t/ha), inorganic fertilizer (Urea 3~2 k&/lta, MP 180 kglba, TSP 158 kgIha) and mixture of organic and inorganic fertilizer (Cowdung 11.5 tJha, Urea 177 kg/ha, TSP 62 kg/ha and MP 63 kglha) and different mulching materials viz. no mulch ~), rice straw (MI). water hyacinth (M2) and black polythene (M3) on the growth and yield of lettuce. The experiment was conducted in the"'Rand()mizedComplete Block Design ~ ... (RCBD) with three replications. "APpliCation of different levels 'of fertilizer and manure significantly influence the growth and yield of lettuce. Organic plus inorganic fertilizer treatment resulted in the highest gross (46.01 tJha) and marketable yield (45.46 t/ha). The highest yield (45.7t1ha) was recorded from black polythene mulch, while the lowest (38.71t/ha) was recorded from unmulch treatment. The combined effect of various levels of fertilizer and manure as well as mulches were ..... also found significant incase of lettuce production. The use of organic plus inorganic fertilizer with black polythene mulch produced the highest gross (50.27 t/ha) and marketable yield (49.62 tlha). The lowest gross (35.44 tJha) and marketable yield (34.9 t/ha ) were recorded from the control treatment where no manure and fertilizer as well as no mulch were used. The benefit cost ratio (BCR) was the maximum (3.23) in the treatment combination of cowdung with water hyacinth mulch whereas, the minimum (2.09) was recorded from the water hyacinth with no fertilizer treatmentItem EFFECTS OF INTERCROPPING AND LEVELS OF NITROGEN ON THE GROWTH AND YIELD OF CARROT (Daucus carota L.)(DEPARTMENT OF HORTICULTURE, 2005) NAHIYA, ABU SHAMIM MOHAMMADA field experiment ":,,asconducted at the Horticulture Farm of Sher-e-Bangla Agricultural University, Dhaka, during October 2004 to February 2005 to study the effects of different intercropping practices and levels of nitrogen on the growth and yield of carrot. Three different intercropping practices viz. non-intercrop, Red amaranth intercrop and Bengal spinach intercrop and three levels of nitrogen viz 0, 200, 250 kg per hectare were used in the study. Carrot was sown as a sole crop at a spacing of 25 x 10 em and Red amaranth and Bengal spinach were sown in between the two rows of carrot as intererops. The experiment was carried out in Randomized Complete Block Design with three replications. Leafy vegetables intereropping had significant influence on yield and yield attributes of carrot, except, root diameter. The highest root length (16.59 ern), fresh . weight of root per plant (135 g), and marketable yield (45.40 t/ha) were recorded from control intercrop (10) and lowest were found from Bengal spinach intercrop (i2). Nitrogen (N) had remarkable effect on growth and yield of carrot. The maximum root length '(16.83 em), root diameter (4.98 ern), fresh weight of root per plant (141.40 g), and marketable yield (47.06 t/ha) were obtained from 25b kg Nlha '(N2) and minimum from control (No). In respect of combined effect control intercrop with 250 kg N/ha (lON2) produced highest root length (17.3Tcm), root diameter (5.33 em), fresh weight of root per plant (161.70 g) and marketable yield (52.13 t/ha), Highest intercrop yield (28.33 t/ha) obtained from the IlN2 (Red amaranth intercrop and 250 Kg N/ha) treatment. Economic analysis showed that Red amaranth intercrop and 250 Kg N/ha gave maximum economic benefit with the benefit cost ratio of 5.22. II j,Item SUNFLOWER BASED INTERCROPPING WITH LEAFY VEGETABLES(DEPT. OF HORTICULTURE, 2005) MOWLA, MOHAMMAD GOLAMAn experiment was conducted at the Horticultural Farm, Sher-e-Bangla Agricultural University, Dhaka, during the period from November 2004 to February 2005 to investigate the sunflower based intercropping with leafy vegetables. There were two variety of sunflower viz. Kironi, Sunwheat-103 and four intercrop viz. non intercrop, Red amaranth, Bengal spinach and Pak-choi. The treatment combinations were set in a Randomized Complete Block Design (RCBD) with three replications. Growth and yield parameters were recorded and the cost benefit analysis was computed to assess the yield potentiality and profitability of sunflower and intercropping of leafy vegetable. Sunflower variety Had significant effect on plant height, number of leaves, diameter of the head, seed yield, 1000 seed weight and oil content. The highest seed yield (961.11 kg/ha) was obtained from variety Kironi. Intercroppe.d leafy vegetables intercropping had remarkable effect on growth, flowering and yield. The combinations of variety and intercrop significantly influenced the plant height, number of leaves, diameter of the head, seed yield and 1000 seed weight. The highest seed yield (1133 kg/ha) was found in the treatment combination of tall variety sunflower (Y.r) and control intercrop (Io). Highest intercrop yield (13.69 t/ha) obtained from the dwarf variety and Red amaranth intercrop (VDIL) treatment combination. Economic analysis showed that tall variety sunflower (Vr) with Red amaranth intercrop (I1J gave the best economic return (Tk 77539/ha) and benefit cost ratio of 2.4 5.Item IN VITRO MICROPROPAGATION OF BANANA(DEPT. OF HORTICULTURE, 2005) KARIM, MD. REZAULThe present study was conducted at the Biotechnology Laboratory, Biotechnology Division, Bangladesh Agricultural Research Institute (BARI), Gazipur during the period from September, 2004 to June, 2005 to investigate the effect of different concentrations of BAP and NAA on virus free plant regeneration, shoot multiplication and different concentrations of IBA and IAA on in vitro root formation ofbanana cv. BARI-I. The culture meristem first turned brown in colour in 4-5 days and after 30-50 days later a green globular hard coat mass grow to be round in shape producing a ball like structure. From this ball like structure adventitious plantlets were developing. Among the different concentration 7.5 mgl," BAP + 0.5 mgl," NAA showed the highest shoot proliferation 0.75, 2.75 and 6.25 shoots per explant at 10, 20 and 30 DAI respectively. The longest shoot was produced by the treatment concentration 7.5 mgl," BAP + 0.5 mgl," NAA treatment (1.03, 2.45 and 3.38 cm) at 10, 20 and 30 DAI respectively. The maximum number of leaves (2.50, 3.25 and 7.00 leaves/explant at 10, 20 and 30 DAI) produced on the medium supplemented with 7.5 mgl," BAP and 0.50 mgl," NAA. The longest leaves was produced by the treatment concentration 7.5 mgl," BAP + 0.5 mgl," NAA treatment (0.85, 2. 70 and 4.23 cm at 10, 20 and 30 DAI) respectively. For root initiation half strength MS medium supplemented with different levels of IBA (0, 0.5, 1.0 and 1.50 rngl.") and IAA (0, 0.5 and 1.0 mgL"1) in order to allow root formation. Root numbers varied with different concentrations of IBA and IAA. The highest number of roots were produced by 0.5 mgl." IAA + 0.5 mgl," IBA (3.50, 4.50 and 6.50 per explant respectively). The highest length was observed at 10, 20 and 30 DAI in the treatment concentration 0.5 mgl," IAA and IBA (2.93, 4.63 and 5.88 cm) which was statistically significant. Meristem derived plantlet transferred to polybags containing 1 : 1 (ground soil : cowdung) mixture after 7 days hardening in room temperature (28-30°C) and established plantlet is ready for planting.Item GROWTH, YIELD AND SHELF LIFE OF TOMATO (Lycopersicon esculentum) AS INFLUENCED BY NITROGENOUS FERTILIZER(DEPT. OF HORTICULTURE, 2005) SHAMIM, MD. SHOFIQUL ISLAMField and laboratory experiments were conducted at the farm and laboratory of the Horticulture Research Centre (HRC), Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur during the period from October 2004 to April 2005. The objectives of the research work were to study the growth, yield, relative cost, returns, and shelf life of BARI tomato-9 as influenced by different levels of nitrogen and stages of fruit maturity. Two experiments were laid out in a randomized complete block design (RCBD) with three replications. There were seven nitrogen levels (0, 140, 160, 180, 200, 220 and 2-W Kg °!'-:ha) in the first experiment and SC\'Cll nitrogen levels (0. 1-llJ. I ()0. I SO. 200. 220 and 2-10 Kg I'\ ha) with three stages of maurritv (breaker stages. hal l-ripc. any lull ripe) in the second experiment. Plant height. number or k~I\ cs. da; s to :'()"" llU\\'Cring. number nl' llowcr clusters. number of flowers per cluster. fruits per plant. fruit length and diameter, weight of individual fruit and fruit yield were significantly influenced by different levels of nitrogen. The highest levels of nitrogen (240 Kg N/ha) produced the highest fruit yield (85.42 ton/ha) and gave maximum (3.07) Benefit cost ratio (BCR).Item EFFECT OF DA TE OF SOWING ON GROWTH AND YIELD OF THREE VARIETIES OF RADISH (Raphanus sativus L.)(DEPT. OF HORTICULTURE, 2005) ALAM, MD. KHAIRULThe present experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka, during the period from November 2004 to January 2005 to study the effect of date of sowing on growth and yield of three varieties of radish. Seeds of three cultivars of radish namely Tasakisan, SAU Line-I and Red Bombay were sown on three different dates viz. November 1, November 15, December 1. Sowing date Showed significant effects on the growth and yield of radish. Maximum number of leaves and leaf length were produced by plant sown on November 1, Similarly root diameter (width), root fresh weight, yield per plot and yield per hectare were obtained from November 1 sowing. All these parameters showed decreasing trend as sowing date was delayed. In the experiment, November 1 sowing gave the highest yields of (81.82 t/ha) compared to the lowest yield of 68.75 t/ha by December 1 sowing V2 (SAU Line-I). There was no significant variation among the varieties. Combined effect of sowing date and varieties showed that sowing on November 1, all cultivars performed well in respect of yield and yield components. November 1 showed the best sowing date of radish and SAU Line -1 gave the highest yield but the benefit cost ratio (10.52) was the highest in Tasakisan. Late sowing produced Radish of poor quality, as they were hard in texture and poor in overall acceptability.Item EFFECTS OF INTERCROPPING AND LEVELS OF NITROGEN ON THE GROWTH AND YIELD OF CARROT (Daucus carota L)(DEPT. OF HORTICULTURE, 2005) NAHIYAN, ABU SHAMIM MOHAMMADA field experiment was conducted at the Horticulture Farm of Sher-e-Bangla Agricultural University, Dhaka, during October 2004 to February 2005 to study the effects of different intercropping practices and levels of nitrogen on the growth and yield of carrot. Three different intercropping practices viz. non-intercrop, Red amaranth intercrop and Bengal spinach intercrop and three levels or nitrogen viz 0. 200, 250 kg per hectare were used in the study. Carrot was sown as a sole crop at a spacing of 25 x I 0 cm and Red amaranth and Bengal spinach were sown in between the two rows of carrot as intercrops. The experiment was carried out in Randomized Complete Block Design with three replications. Leafy vegetables intcrcropping had signi ficant influence on yield and yield attributes of carrot, except root diameter. The highest root length ( 16.59 cm). fresh weight of root per plant ( 135 g). and marketable yield (-l5.40 t/ha) were recorded from control intercrop (10) and lowest were found from Bengal spinach intercrop (I:;). Nitrogen (N) had remarkable effect on growth and yield of carrot. The maximum root length (I 6.83 cm), root diameter (4.98 cm), fresh weight of root per plant ( 141.40 g). and marketable yield (47.06 t/ha) were obtained from 250 kg N/ha ()J:;) and minimum from control (N0). In respect of combined effect control intercrop with 250 kg N/ha (10N:;) produced highest root length (I 7.37 cm), root diameter (5.33 cm). fresh weight of root per plant (I 6 I. 70 g) and marketable yield (52.13 t/ha). Highest intercrop yield (28.33 t/ha) obtained from the 11 N:; (Red amaranth intercrop and 250 Kg N/ha) treatment. Economic analysis showed that Red amaranth intercrop and 250 Kg !\/ha gave maximum economic benefit with the benefit cost ratio of 5.22.Item EFFECTS OF MATURITY STAGES AND ETHREL ON THE RIPENING AND QUALITY OF TOMATO(DEPT. OF HORTICULTURE, 2005) RAHMAN, B.M. SAIDURAn experiment was conducted at the laboratories of the Plant Physiology section of the Horticulture Research Centre (HRC) and Post Harvest Laboratories under the Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur, during the period from January to March 2005 to study the effects of different stages of maturity and different concentration of ethrel treatments on changes in ripening and quality of tomato fruits during the postharvest storage. Fruits of three maturity stages viz. mature green, breaker and half-ripe were treated under three ethrel concentrations viz. control, 500 ppm ethrel and 1000 ppm ethrel. Different maturity stages, ethrel treatments and their combinations showed the highly significant variation on ripening and quality of tomato. The half ripe tomato treated with 1000 ppm ethrel gave quick colour development (3.00 days) and the highest vitamin-C (12.46 mg/lOOg tomato pulp), titrable acidity (0.456%) reducing sugar (4.50%), non reducing sugar (I.70%), total sugar (5.07%) and TSS (5.50%) at final day of observation and the mature green tomato treated with 1000 ppm ethrel showed maximum days of shelf life (37.00 days) and showed the highest pH (4.71) at the 500 ppm ethrel treatment. On the other hand, the mature green tomato under control treatment showed the highest weight loss (14.92%) at the final day of observation. The mature green tomato under control conditions showed the delay colour development or ripening (15.00 days) and the lowest vitamin-C (3.68 mg/lOOg tomato pulp), reducing sugar (3.85%) and TSS (4.49%) at the final day of observation. Half ripe tomato treated with 1000 ppm ethrel showed the lowest weight loss (14.00%), pH (4.26) and non-reducing sugar at the final day observation and green mature tomato treated with 500 ppm ethrel showed the lowest titrable acidity (0.443%) and total sugar (4.73%) and half ripe tomato with control treatment showed the lowest shelf life (20.00 days). From the investigation, it may be concluded that for early ripening half-ripe tomato treated with 1000 ppm ethrel is the best and to extend the shelf life, mature green tomato treated with 1000 ppm ethrel is the best. On the other hand, weight loss and other physio chemical characteristics were found to be the highest when half-ripe tomatos were treated with 1000 ppm ethrel.Item EFFECTS OF MULCHING AND PRUNING ON GROWTH AND YIELD OF TOMATO (Lycopersicon esculentum Mill.)(DEPT. OF HORTICULTURE, 2005) ISLAM, MD. AMINULstraw and control (no mulch) and three pruning treatments cg. single stem pruning. pruning up to I st llowcr cluster and control (no pruning) at the research farm of Olcriculturc Division of the I lorticulturc Research Center (I IRC), Bangladesh Agricultural Research Institute, Joydcbpur. Gazipur during the period from 20 October 2004 lo 20 March 2005 lo find out the suitable mulching and pruning practices on growth and yield of tomato (IJARl-6). The result of the experiment revealed that the plant height. number or flower cluster per plant, number or fruits per plant. fruit breadth. yield of fruit per plant and yield tons per hectare were significantly influenced by different mulching and pruning treatments. EFFECTS OF MULCHING AND PRUNING ON GROWTH AND YIELD TOMATO I\ field experiment was The result of the experiment revealed that the plant height. number or flower cluster per plant, number or fruits per plant. fruit breadth. yield of fruit per plant and yield tons per hectare were significantly influenced by different mulching and pruning treatments. EFFECTS OF MULCHING AND PRUNING ON GROWTH AND YIELD TOMATO I\ field experiment was conducted with three mulching treatments cg. mulching The highest yield (94.37 t/ha) was obtained from straw mulch followed by mulch with black polyethylene (88.47 t/ha) and no mulch (72.43 t/ha) respectively. The pruning up to I '1 flower cluster produced highest yield (89.57 t/hu) than no pruning (89.17 I/ha) and the single stem pruning (76.53 I/ha). The highest fruit yield (103.5 t/ha) was recorded from the combination or mulching with straw and pruning up lo I '1 [lower cluster. which may be recommended for high yield or tomato.Item EFFECT OF HORMONE ON HEAT TOLERANT TOMATO HYBRID (Lycopersicon esculentum Mill) LINES(DEPT. OF HORTICULTURE, 2005) RASHID, MD. HARUNURTomato is one of the popular vegetables in Bangladesh. High temperature (both day and night), humidity, rainfall and light intensity are the basic limiting factors of the tomato production in summer season. During summer season tomato is available in urban market at an exorbitant price. These tomatoes are coming from exotic source mostly through unapproved channel. There is a great demand of tomato in summer- rainy season but there is no good variety for this season. Recently BARI has released some heat tolerant open pollinated and hybrid varieties with some limitations liking hormone application and smaller fruit size. Considering the factors, the experiment was under taken to evaluate the newly developed 13 heat tolerant tomato hybrids under field condition with and without application of hormone during summer-rainy season. The experiment was conducted at the Research Farm of Olericulture division under Horticulture Research Centre of Bangladesh Agricultural Research Institute (BARI) Joybebpur, Gazipur during the month of May 2004 to August 2004. The experiment was laid out in a RCBD (factorial) with three replications. Thirteen ( 13) hybrids of heat tolerant tomato lines and with and without hormonal application were included in this experiment. The highest yield of fruit per plant (587.50 g) was recorded from the line C12 and the lowest yield of fruit per plant (221.50 g) was found from the line C3. Hormone application had positive effect on the yield contributing characters and yield of hybrid tomato lines. The highest yield of fruits per plant (444.72 g) was recorded from the hormone-applied line, which was 65 % higher than no-hormone. Heat tolerant hybrid tomato line C12 with the hormone application resulted better yield contributing characters and produced highest yield of fruit per plant (778g).