http://localhost:8080/handle/123456789/3928 2026-04-18T16:17:03Z 2026-04-18T16:17:03Z Alam, Md. Siddique http://localhost:8080/handle/123456789/3933 2022-07-20T07:11:24Z 2011-01-01T00:00:00Z

DEVELOPMENT OF SUMMER TOMATO PRODUCTION TECHNOLOGY TO IMPROVE YIELD AND QUALITY Alam, Md. Siddique A series of experiments were carried out during the period from May 2012 to September 2014 with a view to develop potential management techniques of summer tomato cultivation for higher yield and fruit quality. Five sets of field experiments were conducted at Olericulture farm of Bangladesh Agricultural Research Institute, Gazipur, Bangladesh. The most popular summer tomato variety BARI hybrid tomato 4 was used in all the experiments. In the first experiment, pre-transplanting seedling management practices were evaluated to observe their effects on seedling quality and yield. Response of different shade intensity was measured in the second experiment. In the third experiment staking and pruning methods were standardized. Fruit thinning was done to find out the effects on fruit quality and yield in the fourth experiment. In experiment five, the treatments found most effective in previous experiments and farmer's practices were accumulated and compared in different combinations to formulate a best combined management practices. Results indicated that soil added with cocodust and cowdung in the ratio of 2: 1:2 filled in polybags produced seedlings with the highest value of seedling vigor index I & IJ (2356 and 639) as well as the highest seedling quality index (140). Accordingly, the highest stem diameter (5.45 mm), leaf number (13.7) and leaf area (159.60 cm) were obtained from the same treatment. Seedlings grown in polybags with the ratio of soil+cocodust+cowdung (2:1:2) was resulted the highest (94 %) seedling survivality in the field with the highest number of fruits per plant (39.1), yield (1.64 kg) per plant and total yield (44.37 tha). Shade intensity influenced the growth, yield contributing characters and fruit quality. Higher photosynthesis rate was observed in 20% to 30% shade condition in different growth stages. The highest number of marketable fruits per plant (36.1) were counted from 30% shade treatment which also produced significantly the highest yield (44.6 t/ha). The maximum fruit length (4.48 cm), fruit diameter (4.58 cm) and individual fruit weight (47.I g) were obtained from 30% shade treatment. Different shade levels showed significant effects on chemical composition of fruits. Significantly the highest number of fruits per plant (37.1), marketable fruits per plant (33.7), yield per plant (1.68 kg) and yield per hectare (44.6 t/ha) were recorded from the treatment string staking with four stems. Fruit thinning had significant effect on fruit size, physical quality and yield but had no influence on chemical content of tomato. The highest individual fruit weight (55.3 g, fruit length (4.64 cm), diameter (4.82 cm), pericarp thickness (0.83 cm), shelf life (23 days) and fruit firmness (3.52 kg-f cm") were obtained from the treatment that retained 20 fruits per plant but treatment which retained 30 fruits per plant produced the highest yield per hectare (42.47 t/ha). Combination of the most effective treatments in previous experiments where, seedlings grown in polybags having soil+cocodust+cowdung in the ratio of 2:1:2 media, transplanted under 30% shade and staking with string keeping four stem had a great effect on yield and profitability of summer tomato. The highest fruit set (42.65 %), number of marketable fruits per plant (36.5), the highest fruit length (4.56 cm), fruit diameter (4.67 cm), the maximum individual fruit weight (54.61 g) the highest yield per plant (1.85 kg) and yield per hectare (49.62 t/ha) were recorded from the most effective treatments combination. The maximum net return (Tk. 1098850/ha) and benefit cost ratio was 1.96 from the same treatment. The present study conclude that the developed production technology was cost effective and income generating in summer tomato. A Dissertation Submitted to the Sher-e-Bangla Agricultural University, Dhaka In partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY

2011-01-01T00:00:00Z Alam, Md. Shamshul http://localhost:8080/handle/123456789/3929 2022-07-20T07:06:33Z 2011-01-01T00:00:00Z

STANDARDIZATION OF AGRO-TECHNIQUES FOR THE PRODUCTION OF PROCESSING QUALITY POTATO Alam, Md. Shamshul Six experiments were carried out at the Tuber Crops Research Center of Bangladesh Agricultural Research Institute, Gazipur during the period from November 2012 t0 February 2015 with a view to developing a package of agro-techniques for maximizing process grade tuber yield and quality. The popular potato variety BARJ Alu 28 (Lady Rosetta) was used in all the experiments. ln the first experiment, planting time and dehaulming schedule were evaluated to maximize process grade tuber yield and quality. Response of different planting geometry was measured in the second experiment. In the third experiment seed tuber size and inter row spacing were standardized. Nitrogen and potassium fertilizers were evaluated to find out the optimum doses for higher process grade yield and quality in the fourth experiment. ln the 5th experiment, the treatments found most effective in experiments 2, 3 and 4 were accumulated and compared in different combinations to formulate the best agro-technique package, In the 6th experiment, the treatments found most effective in previous two experiments of nitrogen and potassium were evaluated with cowdung manure for better quality processing tubers production. Results indicated that significantly higher yield of process grade tuber was recorded in November I5 planting in combination with all the dehaulming schedules, ranged from 20.67 to 21.50 t/ha. Processing quality parameters like high specific gravity and dry matter and low reducing sugar content were significantly influenced in the former planting time under dehaulming at 90 days after planting. The chips and French fry grade tubers as well as total tuber yield were the highest at 67.5 cm x 25 cm spacing. Medium sized seed tuber found profitable for maximizing tuber yield as well as dry matter production under 25 cm intra row spacing. This combination also gave the highest yield of chips grade tuber (21.9 t/ha). Nitrogen and potassium in combination significantly increased the chips and French fry grade tuber number and weight per hill as well as their yield. Reducing sugar content was the lowest (31.97 mg/I 00 g fresh weight) at 200 kg K/ha. Dry matter content increased up to 150 kg/ha of both N and K doses and higher doses showed declining tendency. With cowdung manure, an integrated plant nutrient supply method increased yield and quality of process grade tubers. However, the quality of process products vary significantly with all other factors except planting geometry, seed size and organic matter.

2011-01-01T00:00:00Z