http://103.7.193.12:8080/xmlui/handle/123456789/16 DEPARTMENT OF CROP PHYSIOLOGY & ECOLOGY (CPE) 2026-06-09T23:45:46Z http://103.7.193.12:8080/xmlui/handle/123456789/2144 PHYSIOLOGICAL ATTRIBUTES AND YIELD OF WHEAT AS INFLUENCED BY IRRIGATION AND NITROGEN FERTILIZER APPLICATION HAQUE, MD. ZIAUL The experiment was conducted at the research farm and laboratory of Crop Physiology and Ecology Department, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh in 2014 - 2015 and 2015 - 2016 to study the morpho-physiological parameters, phenological stages, water relations, chlorophyll content, proline accumulation, nitrogen uptake, protein content, N use efficiency, yield and yield contributing characters of wheat. Benefit-cost ratio was calculated for cultivation of two varieties. Four levels of irrigations (i) I0- Rain-fed condition (control) (ii) I1- One irrigation (30 mm) (iii) I2- Two irrigations (30+30 =60 mm) and (iv) I3- Three irrigations (30+30+30 =90 mm) and four split application of nitrogen were (i) N0- control (no nitrogen) (ii) N1- total nitrogen at basal dose (iii) N2- one third of the N fertilizer was applied at basal dose, one third of the N fertilizer was applied at crown root initiation stage and the rest was applied at maximum tillering stage and (iv) N3- one fourth of the N fertilizer was applied at basal dose, one fourth of the N fertilizer was applied at crown root initiation stage, one forth was applied at maximum tillering stage and the rest was applied at heading stage. Two wheat varieties, namely, BARI Gom 24 and BARI Gom 26 were tested for the above mentioned parameters. The experiment was laid out in a split-split plot design with 3 replications. Irrigation and nitrogen treatments had significant effects on all above mentioned parameters in both the years. The plants grown in three irrigations (I3) condition needed the highest days for attaining their different phenological stages. Three irrigations exhibited the highest crop growth, morpho-physiological traits, water consumption, chlorophyll content, yield contributing characters, nitrogen uptake, grain and straw yield of wheat. With some exceptions, varieties had no significant effects on all the above mentioned parameters in this study. Among the nitrogen treatments, the highest crop growth, morpho-physiological traits, yield contributing characters, nitrogen uptake, protein content, N use efficiency, grain and straw yield were recorded in three split (N2) applications of nitrogen in both the years. Simple correlation coefficients between the yield contributing characters and grain yield for different irrigation and nitrogen treatments indicated that grain yield was positively correlated with yield components. In case of benefit-cost ratio, the highest benefit-cost ratio was found from BARI Gom 24 with three irrigations and three split applications of nitrogen. Wheat production with three irrigations gave the highest crop growth, morpho-physiological traits, water consumption, yield contributing characters, nitrogen uptake, grain and straw yield which were statistically similar with two irrigations. For the efficient use of nitrogen for wheat cultivation N fertilizer should be applied as three splits such as at basal, at CRI and during maximum tillering stages. PHYSIOLOGICAL ATTRIBUTES AND YIELD OF WHEAT AS INFLUENCED BY IRRIGATION AND NITROGEN FERTILIZER APPLICATION; A Dissertation By MD. ZIAUL HAQUE, Student No. 1405208; DOCTOR OF PHILOSOPHY IN CROP PHYSIOLOGY AND ECOLOGY, DEPARTMENT OF CROP PHYSIOLOGY AND ECOLOGY, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY DINAJPUR- 5200, BANGLADESH; May 2019. 2019-05-01T00:00:00Z http://103.7.193.12:8080/xmlui/handle/123456789/2141 EVALUATION OF WHEAT GENOTYPES FOR SUSTAINING YIELD UNDER WATER DEFICIT CONDITION Akhter, Mst. Masuma Drought is a worldwide problem, constraining wheat production seriously and recent global climate change has made this situation more staid. Selection of drought tolerant wheat genotypes as well as to development of proper crop management techniques is useful tools to enhance the drought tolerance. Regarding these issues, four experiments were conducted during 2014 to 2017 at Hajee Mohammad Danesh Science and Technology University and Bangladesh Wheat and Maize Research Institute (BWMRI), Dinajpur. Effect of PEG 6000 induced water stress (0, -2, -4 bars) on the germination and seedling growth of 30 wheat genotypes was evaluated in petri-dishes on September 2014. Wheat genotypes (BARI Gom 25, E 38, BAW 1118, E 18, Shatabdi, BAW 1138, E 34, E30, BAW 1135 and E 3) showing less affected speed of germination (rate of germination (%), co-efficient of germination and germination vigour index) and seedling growth (length and dry weights of shoot and root) along with higher STI (Stress tolerant index) based on seedling dry weight were considered as comparatively water deficit stress tolerant genotypes. The wheat genotypes (BAW 1151, E 42, BAW 1170, E 29, BAW 1161, E 2, BAW 1157, E 23, BAW 1130 and BARI Gom 26) showed reverse value of the aforesaid traits due to severe stress designating comparatively water deficit stress susceptible genotypes. To screen out more authentically based on yield traits and yield, all genotypes were grown in the field in 2014-15 under three water regimes viz. well watered (three irrigations), one irrigation and no irrigation condition. In no irrigated plots, wheat genotypes- BARI Gom 25, E 18, E 38, BAW 1118, BAW 1170, E 24, E 28, E 3, BAW 1171 and E 34 showed higher relative yield attributes and yield indicating tolerant, while BARI Gom 26, BAW 1130, BAW 1140, BARI Gom 27, BAW 1143, BARI Gom 28, BAW 1138, BAW 1157, E 23 and Sourav showed lower relative value signifying susceptible genotypes. Considering experiments I and II, four water deficit stress tolerant (BARI Gom 25, E 18, E 38 and BAW 1118) and two susceptible genotypes (BARI Gom 26 and BAW 1130) were evaluated physiologically in the third experiment. In view of chlorophyll content, SPAD value, water status (Relative water content, water retention capacity), canopy temperature depression, cell membrane stability (CMS), production of osmolytes (proline and soluble sugar), yield traits and yield, the genotype E 38 showed the highest stress tolerance and the genotype BAW 1130 showed the lowest stress tolerance. To ameliorate the adverse effect of drought stress, these two genotypes (E 38 and BAW 1130) were evaluated with five potassium fertilizer treatments in combination with water regimes during 2016-17. Additional soil and foliar application of potassium enhanced water stress tolerance in relation to LAI, LDW, TDW, water relation, nutrients (N, P, K) uptake, yield traits and yiled. However, considering the results of seed germination, seedling growth, physiology, yield traits and yield, the E 38 can be declared as a drought tolerant genotype, and addition of 75 kg K ha-1 may advised to apply for cultivation of wheat under rainfed condition in the drought prone area of Bangladesh. EVALUATION OF WHEAT GENOTYPES FOR SUSTAINING YIELD UNDER WATER DEFICIT CONDITION; A Dissertation By Mst. Masuma Akhter, Student No. 1405164; DOCTOR OF PHILOSOPHY IN CROP PHYSIOLOGY AND ECOLOGY, DEPARTMENT OF CROP PHYSIOLOGY AND ECOLOGY, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY DINAJPUR, BANGLADESH; FEBRUARY 2019. 2019-02-01T00:00:00Z http://103.7.193.12:8080/xmlui/handle/123456789/2107 EFFECTS OF KITCHEN WASTE COMPOST ON GROWTH AND YIELD OF TOMATO A field experiment was conducted at the research field of Department of Crop Physiology and Ecology, Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur during December, 2022 to April, 2023 to find out the effect of kitchen waste based composts (KWC) on the performance of tomato cultivation. The experiment was laid out in a single factorial Randomized Complete Block Design (RCBD) with three replications. The experiment was consisted of 6 treatments such as C1 = 100% Recommended Dose of Fertilizer (RDF)+10 t ha-1 of KWC, C2 = 100% RDF +7 t ha-1 of KWC, C3 = 100% RDF+5 t ha-1 of KWC, C4 = 80% RDF+10 t ha-1 of KWC, C5 = 80% RDF+7 t ha-1 of KWC and C6 = 80% RDF+5 t ha-1 of KWC. The tomato variety Bipul Plus was used as planting material. No significant variation was observed among all the compost treatments for number of days to 50% flowering and for number of days to 50% fruiting. KWC in combination with RDF had positive impact on plant height, number of leaf plant-1, number of branches plant-1, SPAD value, fruit length, fruit diameter, fruit plant-1 , single fruit weight, yield plant-1 and yield at harvest. At harvest, the highest fruit length (54.20mm) and fruit weight (66.09g) was found in C2 treatment; the highest fruit weight (66.09g) was found in C1 treatment, whereas the highest yield plant-1 (1.68kg), yield plot-1 (16.39kg), yield (81.97 t ha-1) was found in C3 treatment. Among the six treatments, C3 treatment (100% RDF+5 t KWC) is the most effective combination for enhancing tomato production. EFFECTS OF KITCHEN WASTE COMPOST ON GROWTH AND YIELD OF TOMATO; A Thesis By Student No. 1501013, MASTER OF SCIENCE; IN CROP PHYSIOLOGY AND ECOLOGY, DEPARTMENT OF CROP PHYSIOLOGY AND ECOLOGY, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY DINAJPUR, BANGLADESH; DECEMBER 2023. 2023-12-01T00:00:00Z 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. 2024-12-01T00:00:00Z