http://103.7.193.12:8080/xmlui/handle/123456789/16 DEPARTMENT OF CROP PHYSIOLOGY & ECOLOGY (CPE) Fri, 17 Apr 2026 15:31:49 GMT 2026-04-17T15:31:49Z http://103.7.193.12:8080/xmlui/handle/123456789/2082 IMPROVEMENT OF DROUGHT AND SALINITY TOLERANCE OF CORIANDER (Coriandrum sativum L.) THROUGH APPLICATION OF MELATONIN NAHIAN, KAZI AN Coriander (Coriandrum sativum L.) is one of the most important condiments for culinary purposes.Addressing this issue, there were two experiments were carried out at Hajee Mohammad Danesh Science and Technology University in the Department of Crop Physiology and Ecology from 2023 to 2024 followed by completely randomized design (CRD) with three replications. During the experimental period germination traits, seedling growth, photosynthetic pigments, proline contents and water relations were measured to understand the role of melatonin in mitigating the ill effects of drought and salinity stress of coriander (BARI Coriander 2). The experiment 1 was related to drought stress and the treatments were T1 = Control condition (Tap water + 0 µM MT), T2 = Moderate drought stress (-2 bars) + 0 µM MT, T3 = Moderate drought stress (-2 bars) + 50 µM MT, T4 = Moderate drought stress (-2 bars) + 100 µM MT, T5 = Moderate drought stress (-2 bars) + 150 µM MT, T6 = Higher drought stress (-4 bars) + 0 µM MT, T7 = Higher drought stress (-4 bars) + 50 µM MT, T8 = Higher drought stress (-4 bars) + 100 µM MT and T9 = Higher drought stress (-4 bars) + 150 µM MT. From the results of Experiment 1, it was observed that drought stress plots (T2-T9) showed lower performance in respect of germination, seedling growth and photosynthetic traits compared to control condition (T1). However, the pots treated with MT showed the better results in compared to the no MT-treated pots in artificially created drought conditions. The plants treated with 100 µM MT (T4) revealed that the highest germination traits (Germination percentage, 97%; Mean Germination Time, 14.31 days and Germination rate index, 37.46; Co-efficient velocity of germination,9.15 and Timson germination rate index 17.14); Photosynthetic pigments (chlorophyll a 6.05 mg g-1 FW; chlorophyll b 1.90 mg g-1 FW, total chlorophyll 7.95 mg g-1 FW, and total carotenoids 2.46 mg g-1 FW) and growth attributes (shoot length ,9.29 cm; root length, 10.04 cm ; seedling dry weight, 0.037 mg) traits. Whereas, the lowest germination (Germination percentage, 56%; Mean Germination Time, 13.18 days and Germination rate index,21.71;co efficient velocity of germination 7.04; Timson germination rate index,10.35); Photosynthetic pigments (chlorophyll a ,3.10 mg g-1 FW; chlorophyll b, 1.13 mg g-1 FW, Total chlorophyll ,4.23 mg g-1 FW, and Total carotenoids, 0.85 mg g-1 FW) and growth parameters (shoot length ,7.30 cm; root length, 6.89 cm ; seedling dry weight, 0.016 mg) traits were observed at T9 treatment. On the other hand, highest level of proline was observed in drought stress plots compared to the control (T1) condition. Among all the treatments (T2-T9) under drought condition, the lowest level of proline observed T4. IMPROVEMENT OF DROUGHT AND SALINITY TOLERANCE OF CORIANDER (Coriandrum sativum L.) THROUGH APPLICATION OF MELATONIN; A Thesis By KAZI AN NAHIAN, Student No: 2205100; MASTER OF SCIENCE IN CROP PHYSIOLOGY AND ECOLOGY, DEPARTMENT OF CROP PHYSIOLOGY AND ECOLOGY, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY DINAJPUR; DECEMBER 2024. Sun, 01 Dec 2024 00:00:00 GMT http://103.7.193.12:8080/xmlui/handle/123456789/2082 2024-12-01T00:00:00Z http://103.7.193.12:8080/xmlui/handle/123456789/2070 EFFECTS OF GA3 AND NITROBENZENE ON GROWTH AND YIELD PERFORMANCE OF WHEAT UNDER LATE SOWN CONDITION AHMED, SABBIR To evaluate the effect of Gibberellic acid (GA3) and Nitrobenzene on late sown wheat, an experiment was conducted at the research field of Crop Physiology and Ecology Department, Hajee Mohammad Danesh Science and Technology University, Dinajpur, during November 2022 to April 2023. The experiment was laid out in a two factorial RCBD design with three replications. The factors used in the experiment were, Factor A: three growing conditions viz. Normal (seeds were sown on November 15, 2022), foliar application of GA3 under late sown condition (seeds were sown on January 1, 2023), and foliar application of Nitrobenzene under late sown condition (seeds were sown on January 1, 2023). Factor B: three wheat varieties (BARI Gom 28, BARI Gom 30, and BARI Gom 33). Interaction effect of growing conditions and wheat varieties significantly influenced the different physiological traits, yield and yield attributes of wheat. Highest SPAD value was found in BARI Gom 33 under normal condition and the lowest SPAD value was found in BARI Gom 33 under late sowing condition with Nitrobenzene, however they are not statistically different. Canopy temperature was cooler in normal growing condition compared to late sown condition. Foliar application of GA3 increased plant height, spike length, and biological yield in BARI Gom 28; thousand grain weight in BARI Gom 30 and BARI Gom 33; grains spike-1 and grain yield in BARI Gom 30. Foliar application of Nitrobenzene increased plant height, spike length in BARI Gom 28 and BARI Gom 33; grains spike-1, thousand grain weight, grain yield in BARI Gom 30 and BARI Gom 33; and biological yield in all the varieties. The results of the present study indicated that the application of GA3 and Nitrobenzene increased wheat yield at late sown condition, and BARI Gom 33 showed highest yield among the three late sown varieties. EFFECTS OF GA3 AND NITROBENZENE ON GROWTH AND YIELD PERFORMANCE OF WHEAT UNDER LATE SOWN CONDITION; A Thesis By SABBIR AHMED, Student No. 1701169; MASTER OF SCIENCE IN CROP PHYSIOLOGY AND ECOLOGY, DEPARTMENT OF CROP PHYSIOLOGY AND ECOLOGY, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR-5200, BANGLADESH; DECEMBER 2023. Fri, 01 Dec 2023 00:00:00 GMT http://103.7.193.12:8080/xmlui/handle/123456789/2070 2023-12-01T00:00:00Z http://103.7.193.12:8080/xmlui/handle/123456789/2069 SUSTAINABLE PRODUCTION OF SWEET PEPPER (Capsicum annuum L.) USING POLYHOUSE FOR LOW TEMPERATURE MANAGEMENT Islam, Md. Shajedul A research work was conducted during November 2022 to May 2023 to manage low temperature effect for sustainable production of sweet pepper (Capsicum annuum L.) using polyhouse. Two growing conditions (Polyhouse and open field) and four genotypes were evaluated based on their morpho-physiological, biochemical characteristics and yield attributes at research field and laboratory of the Department of Crop Physiology and Ecology, HSTU, Dinajpur. The experiment was laid out in a Split Plot Design with three replications. Main plot treatment comprised of two growing conditions mentioned above and subplot treatment included four varieties of sweet pepper such as green, orange, red and yellow varieties. Polyhouse condition played a significant role on regulation of temperature and relative humidity (%) which ultimately control the production of sweet pepper. Different growth parameters, physiological, biochemical and yield attributes such as plant height, leaf number, SPAD value, vitamin C, total carotenoid, fruit length, fruit diameter, single fruit weight, no. of fruit per plant, fruit weight per plant, fruit yield per plot and fruit yield (tha-1) were measured during the experiment period. Result revealed that the poly house condition always showed better performance in production of sweet pepper than that of open field condition. All the varieties performed equally in terms of fruit yield. Red variety contained the maximum vitamin C (74.1mg/100ml) but the yellow variety contained the highest total carotenoid (30.48 µ/g). Poly house growing condition significantly influenced the yield and yield traits. Red variety in polyhouse field condition produced the highest yield (12.33 tha-1) but the best market quality of fruit (fruit length 105.95 mm and diameter 100.53 mm) was produced by green variety in poly house field condition which was statistically similar with red variety. Therefore, polyhouse field condition could be used for sweet pepper production at farmer’s level as a low-cost sustainable technique. SUSTAINABLE PRODUCTION OF SWEET PEPPER (Capsicum annuum L.) USING POLYHOUSE FOR LOW TEMPERATURE MANAGEMENT; A Thesis By Md. Shajedul Islam, Student ID No. 1601376; MASTER OF SCIENCE IN CROP PHYSIOLOGY AND ECOLOGY, DEPARTMENT OF CROP PHYSIOLOGY AND ECOLOGY, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR-5200, BANGLADESH; DECEMBER 2023. Fri, 01 Dec 2023 00:00:00 GMT http://103.7.193.12:8080/xmlui/handle/123456789/2069 2023-12-01T00:00:00Z http://103.7.193.12:8080/xmlui/handle/123456789/2048 EFFECT OF IRRIGATION AND STRAW MULCH ON GROWTH AND PRODUCTIVITY OF MAIZE SUKRIA, MARUFA AKHTER A field experiment was carried out at the research field of Crop Physiology and Ecology department, Hajee Mohammad Danesh Science and Technology University, Dinajpur, during November 2023 to July 2024 to evaluate the performance of maize (BWMRI hybrid Bhutta-2) as influenced by different levels of irrigation and mulching. The experiment comprised of two factors such as factor A: three irrigation levels, I1, I2, I3 and factor B: 3 levels of mulch like M0, M1, M2. The experiment was set up in a split plot design with three replications. Both irrigation and mulching significantly by affected growth and productivity characters of maize. In case of irrigation, the tallest plant, highest leaf number, leaf area index per plant, total dry matter per plant, maximum crop growth rate, yield and yield components of maize were observed in I3 and the result was minimum for all above parameters in I1. In case of mulching, the tallest plant, highest leaf number, leaf area index per plant, total dry matter per plant, maximum crop growth rate, yield and yield components of maize were observed in M2 and the result was minimum for all above parameters in M0. In interaction, the tallest plant, highest leaf number, leaf area index per plant, total dry matter per plant, maximum crop growth rate, yield and yield components of maize were in I3M2 interaction whereas the result was minimum for all above parameters in I1M0 interaction. In case of yield and yield contributing characters cob length, cob breadth, number of grain rows per cob, number of grains per cob, 1000 kernel wt, grain yield and harvest index had significant variation due to different irrigation and mulching levels. In different irrigation levels, the best performance was observed in I3 whereas the lowest performance was observed in I1. In different mulching levels, best performance was observed in M2 and the lowest performance was observed in M0. Therefore, in interaction, highest cob length, cob breadth, number of grain rows per cob, number of grains per cob, 1000 kernel wt, grain yield and harvest index were found in I3M2 interaction and the result was opposite for all above parameters in I1M0 interaction. Based on the above findings it can be concluded that an application of irrigation and mulching is the best combination for obtaining higher yield and yield components of hybrid maize. EFFECT OF IRRIGATION AND STRAW MULCH ON GROWTH AND PRODUCTIVITY OF MAIZE; A Thesis By MARUFA AKHTER SUKRIA, Student ID: 2305014; MASTER OF SCIENCE IN CROP PHYSIOLOGY AND ECOLOGY, DEPARTMENT OF CROP PHYSIOLOGY AND ECOLOGY, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR-5200, BANGLADESH; JUNE, 2024. Sat, 01 Jun 2024 00:00:00 GMT http://103.7.193.12:8080/xmlui/handle/123456789/2048 2024-06-01T00:00:00Z