http://localhost:8080/handle/123456789/3900 2026-04-18T16:17:03Z 2026-04-18T16:17:03Z AHMED, MD. FERDAUS http://localhost:8080/handle/123456789/4186 2022-09-05T06:16:49Z 2020-06-01T00:00:00Z

DEVELOPMENT OF PRODUCTION TECHNOLOGIES FOR MILKY WHITE MUSHROOM (Calocybe indica) CULTIVATION IN BANGLADESH AHMED, MD. FERDAUS The present research work was conducted to identify suitable strains and develop appropriate production technologies for commercial cultivation of milky white mushroom in Bangladesh. To satisfy the objectives, eight different experiments were conducted in Mushroom Development Institute, Savar, Dhaka, Bangladesh during 2018 to 2020. In the first experiment, performance of four strains of milky white mushroom Cid-1, Cid-A, Cid-In and Cid-S were evaluated during three growing seasons in a year. Among the strains Cid-1 performed better during summer and rainy season and Cid-A during autumn season. Whereas, performance of strain Cid-S was worst during all the growing season. DNA finger print showed that the four strains were genetically different from each other. In the second experiment nine different combination of substrates were evaluated to identify suitable substrate for milky white mushroom cultivation. Results revealed that, economic yield (427.33 g/packet) was highest in rice straw + sawdust (1:1) substrate followed by rice straw along (352.00 g/packet) on the other hand it was lowest in sawdust + wheat bran (2:1) substrate (264.05 g/packet). Wide variation was observed in nutrient content of fruiting body grown on different substrates. Eleven different combination of casing materials were evaluated in the third experiment. Results indicated that, coconut coir dust + decomposed cow dung (1:1) was the best and coconut coir dust alone was the worst performing casing material. Among different sterilization and spawning methods, hot water treated substrate spawning both in three layers and thoroughly performed better. Different moisture levels of rice straw substrate viz; 35, 40, 45, 50, 55, 60, 65, and 70 percent were used to determine appropriate moisture level of the substrate in the fifth experiment. It was observed that mycelium colonization was faster (14.5 days) at 70% moisture and no mycelium colonization at 35% moisture level. No substrate contamination was observed at 65% and 70% moisture level. Highest yield (361.1g) was recorded at 70% moisture level which was similar to 60% (315.2 g/packet) and 65% (303.8 g/packet) moisture level. In the sixth experiment five different techniques of casing material management were practiced and observed that, removal of dried non effective fruiting bodies after each harvest produced highest number of effective fruiting bodies (8.83) and number of flushes (2.81) but the economic yield and biological efficiency was not insignificantly affected by casing material management technique. To determine appropriate spawn density, 10, 20, 30, 40 and 50 percent rice grain spawn (dry weight basis) was used to inoculate rice straw substrate in the seventh experiment. Results revealed that partial mycelium colonization in spawn packets problem was completely disappeared with the increase of spawn density. Shortest time was required to complete spawn run (12.90 days) and primordia initiation (9.58 days), highest number of effective fruiting body (9.10) and number flushes (3.10), highest economic yield (454.88 g/packet) and biological efficiency (109.61%) were recorded at 50% spawn density but benefit cost ratio (3.83) was highest at 40% spawn density. To determine appropriate harvesting age of fruiting body for getting maximum yield and longer shelf life of milky white mushroom, fruiting bodies were harvested at 5 to 14 days old and stored in refrigerator and ambient condition- in open tray, cellophane wrapped tray and polypropylene bag. Results revealed that the highest number of effective fruiting bodies (9.15) were recoded from five days aged fruiting body harvest but average weight of fruiting body (63.35 g) and economic yield (483.13 g/packet) were highest at eight days harvest. The appearance and odor score of fruiting body decreased after nine days aged and lost its acceptability for consumption after thirteen days aged. The mushrooms lost its acceptability rapidly when it was stored in an open tray than cellophane paper wrapped tray and polypropylene bag both in refrigerator and in ambient condition. Within six days of storage at ambient condition milky mushroom lost its acceptability irrespective of fruiting body age and storage method. In refrigerator six to nine days aged fruiting body stored in cellophane paper wrapped tray and polypropylene bag was remained in good condition for consumption even after 15 days of storage. A Dissertation Submitted to the Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of DOCTOR OF PHYLOSOPHY IN HORTICULTURE SEMESTER: JANUARY - JUNE, 2020

2020-06-01T00:00:00Z 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 jahan, Nur http://localhost:8080/handle/123456789/3931 2022-07-20T07:09:19Z 2012-01-01T00:00:00Z

CHARACTERIZATION, CHARACTER ASSOCIATION AND DIVERSITY ANALYSIS IN CAPSICUM jahan, Nur An investigation was carried out to study characterization, character association and genetic diversity of capsicum at the Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during 2012-2015. Evaluation and morphological characterization of 24 Capsicum accessions were performed using different qualitative and quantitative characters. Wide range of variations among the accessions in respect of plant, leaf, flower, fruit and seed characters were observed. From the field performance it was evident that, the accessions CA-16, CA-20, CA-18 and CA­ 05 were the higher yielder where as the accession CA-19 produced very shy yields. Correlation studies between yield and yield components indicated that fruit diameter, fruit length, plant height and seeds per fruit were significantly and positively correlated with yield. Genotypie correlation coefficient was higher than phenotypic ones in most of the cases, indicating strong inherent relation among the characters. From path coefficient analysis, it was observed that number of fruits/plant, diameter of fruits and fruit weight were the important components of yield of Capsicum. Based on multivariate analysis, 24 capsicum accessions were grouped into five clusters. The highest number of accessions (8) was in cluster Ill followed by cluster II (6) and the lowest (2) was in cluster IV. Principal component analysis revealed that the first four axes were accounted for 79.49% of total variation. Inter-genotypic distance was the highest (4.184) between CA-19 and CA-20 and lowest (0.420) was between CA-05 and CA-17. From the principal co-ordinate analysis, the highest inter-cluster distance (39.99) was estimated between cluster I and cluster IV, and the lowest (11.5) was between cluster II and cluster V. The inter-cluster distance was higher than the intra-cluster distance. Accessions CA-16, CA-18, CA-20 and CA-05 were selected as promising genotypes. RAPD analysis of 24 Capsicum accessions was done to detect genetic diversity at the DNA level. Selected five primers (0PB­ 08, OPC-05, OPJ-13 and OPW-08) amplified 29 bands of which 25 were polymorphic. Similarity indices ranged from 51.71 to 98.18%. Dendrogram based on Nei's (1972) genetic distance using UPGMA indicated that, different level of genetic identity and distance was present among the studied 24 Capsicum accessions. Department of Horticulture Sher-e-Bangla Agricultural University, Dhaka

2012-01-01T00:00:00Z 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