Patuakhali Science And Technology University Research Articles

Pomological traits and profitability of selected velvet apple germplasm

The research was accomplished during February to August, 2021 at Germplasm Center (GC), Patuakhali Science and Technology University (PSTU) and farmers’ homesteads in Patuakhali district to find out different characteristics, fruit yield and profitability of four velvet apple germplasm. The experiment was laid out in Randomized Complete Block Design (RCBD) with four replications. Results manifested that there were significant variations among the germplasm, where local red germplasm exhibited the highest plant height (5.54 m), plant diameter (16.23 cm), number of main branches (12.75), length of the largest branch (3.89 m), plant canopy (8.80 m2), leaf area (135.24 cm2) but those traits were minimum in PSTU Bilati gab-2. PSTU Bilati gab-2 emerged floral bud for the longest duration (32.25 days). The measured length of inflorescence before first flowering varied from 5.03 – 6.60 cm where it required 24 – 28.25 days for development. A range of flowers per inflorescence (7.75 – 11) and duration of flowering (46.5 – 59.25 days) were observed in all the studied germplasm. The percentage of fruit set (18.28 – 30.81) per plant with individual fruit weight 126.70 to 202.43 g. The highest pulp weight (103.85 g) was obtained from PSTU Bilati gab-2 and the lowest (69.25 g) from local yellow germplasm. PSTU Bilati gab-2 was completely seedless. So, it contained the highest edible portion (81.92%). The highest fruit yield (3.5 t/ha) was recorded in PSTU Bilati gab-1 but maximum net profit (251160 Tk/ha) was obtained from PSTU Bilati gab-2 with the highest benefit cost ratio (BCR) of 3.81. Considering percent fruit set, percent edible portion, fruit yield and profitability, PSTU Bilati gab-2 was found to be the best among the four germplasm. Bangladesh J. Agri. 2023, 48(2): 1-12

Effect of foliar application of micronutrients and urea on mungbean varieties

Experiment was carried out to at the Agronomy field of Patuakhali Science and Technology University (PSTU). The treatments comprised of four variety and three fertilizer including control. Varieties were V1= BINA Mung-8, V2=BARI mung-2, V3=BARI mung-5 and V4=BARI mung-6 and treatments were T0 = control, T1 =micro nutrient, T2= micronutrient and urea. The experiment was laid-out in the Randomized Complete Block Design (RCBD) with three replications. The maximum plant height was found at BARI mung-6 (29.7). Maximum nodule number was found at BARI mung-6 variety (5.90). The number of effective nodule was highest at BARI mung-6 variety (2.36). In case of no of seed per pod and 1000-seed weight, BARI mung-6 variety gave highest value and those were 11.25 and 70.5 g respectively. Maximum plant height, nodule number, number of effective nodule and number of pod per plant were found at T2 treatment. The pod length, seed per pod and 1000-seed; T2 treatment gave the highest value and those were 5.5 cm, 11.25 and 65.64 g respectively. In case of plant height, chlorophyll content, number of nodule, number of effective nodule, pod per plant, pod length, pod weight/m2, seed per pod and 1000-seed weight, combined effecr of BARI mung-6 x micronutrient and urea (T2) gave highest value and those were (29.95, 47.5, 6.17, 2.40, 6.20, 6.20, 76.75, 11.20) cm and 68.45 g respectively. This result revealed that mungbean variety BARI mung-6 and T2 treatment performed best in combination (V4T2).

Fertility Status of Soils of Patuakhali Science and Technology University in Bangladesh

Soil is a heterogeneous body and different soil have different fertilizer requirement for crop production depending on fertility status. This research work was conducted to evaluate the fertility status of the soils of the research field of Patuakhali Science and Technology University (PSTU). The soils of PSTU were collected and analyzed for the determination of following soil parameters viz. particle size distribution, texture, pH, organic matter, total nitrogen, available phosphorus, available sulphur and exchangeable potassium. The results showed that the particle size distribution of the collected soils varied significantly with each other. A remarkable variation was observed in textural classes of the soils. The textural classes of the soils were sandy loam, clay and clay loam. The soils were neutral to slightly alkaline in reaction and the pH ranged from 7.01 to 7.73. The organic matter content was very low and ranged from 0.50 to 0.96%. The soils were found to be deficient in total nitrogen with a range of 0.06 to 0.11%. The available phosphorus, available sulphur and exchangeable potassium content of collected soils ranged from 8.76 to 15.90 ppm, 1.04 to 3.06 ppm and 0.12 to 0.26 meq/100 g soil, respectively. The fertility status of the soils was very low to medium level due to very low organic matter content.

Black fungus gnat – An invasive pest of French bean in Bangladesh

French bean is an important vegetable in most tropical and subtropical countries and is a food source for humans and animals. A survey was carried out on the Patuakhali Science and Technology University (PSTU) campus, Narsingdi, Sylhet, Hobigonj, and Mowlovibazar districts of Bangladesh to know the incidence pattern of insect pests of French bean from November 2016 to January 2017. Field screening of nine French bean varieties against major insect pests was conducted in the Regional Horticulture Research Centre, BARI, Shibpur, Narsingdi, from November 2017 to January 2018. Seven varieties viz., BARI Jharsheem-1, BARI Jharsheem-2, BARI Jharsheem-3, Sylhet local- 4, Sylhet local-5, Sylhet local- 6 and Sylhet local-7 were used as study materials to evaluate against major insect pests of French bean under natural field condition. Results revealed that black fungus gnat was first noticed on 13th December, 2016 and the prevalence continued upto the 12th January, 2017. The highest incidence (21/plant) of black fungus gnat was found in Habiganj and the lowest (9/plant) was on the PSTU campus. The highest number of black fungus gnats were captured at 38 DAS (89/trap) and the lowest number (56/trap) of black fungus gnats were at 28 DAS using a yellow sticky trap. The variety BARI Jharshim-3 had the highest population of Black fungus gnats, which indicated that the variety was highly susceptible to Black fungus gnats, while Sylhet local-7 had the lowest population of black fungus gnats indicating least susceptible to Black fungus gnats. Among all tested varieties, none showed complete resistance against black fungus gnats. J. Asiat. Soc. Bangladesh, Sci. 49(1): 1-11, June 2023

Chemical properties and shelf life of velvet apple germplasm

The study was undertaken to evaluate bio-chemical properties, shelf-life determination and expansion of ripe fruits of four velvet apple germplasm. The selected germplasm were local red variety, local yellow variety, PSTU Bilati gab-1 and PSTU Bilati gab-2. Ripe fruits were collected from Germplasm Center, Patuakhali Science and Technology University (PSTU) and different locations of Patuakhali district of Bangladesh. Results expressed that maximum TSS (13.93%), vitamin-C (3.68 mg/100g), non-reducing sugar (5.15%) and total sugar (7.95%) were recorded from PSTU Bilati gab-2, the highest TA (1.30%) was found in PSTU Bilati gab-1 but highest pulp pH (7.50) and TSS to TA ratio (11.11) were recorded from local yellow variety whereas highest reducing sugar (3.17%) was recorded from local red variety. The shelf life of ripe fruit varied from 3.25 – 4.75 days where the longest shelf life was obtained from PSTU Bilati gab-2 and the shortest shelf life was recorded in local red variety. But the storability was extended more than 27 days when stored in “Refrigerator” followed by “Non-perforated polybag (NPP)” (10 days), perforated polybag (8 days) and paper bag (6 days). The firmness of fruits were decreased gradually with days but the reduction was minimized when stored in different storage condition where more firmness hold in refrigerator treatment followed by NPP. Similarly, the weight loss was controlled in refrigerator followed by NPP treatment. The results of the experiments revealed that PSTU Bilati gab-2 provides superior chemical properties among the germplasm and ‘Refrigerator’ treatment exhibited best performance among other.

Host range, damage extent and leaf consumptions by the bagworm, Thyridopteryx ephemeraeformis Haw. (Lepidoptera: Psychidae) in Bangladesh

Bagworm, Thyridopteryx ephemeraeformis Haw. (Lepidoptera: Psychidae) is a polyphagous pest in Northern America and southern Australia, causing severe damage to several host plants. A study was conducted to record the host plants, damage extent, and morphometrics of bagworms in Patuakhali Science and Technology University (PSTU) from 2015 to 2018. Results revealed a limited number of host plants for bagworm namely guava (Psidium guajava), arborvitae/juniper (Thuja standishii), rangan or jungles, geranium (Ixora grandiflora/Ixora coccinea), mussaenda (Mussaenda philippica), cropperleaf (Acalypha wilkesiana ‘Ceylon), henna (Lawsonia inermis), mango (Mangifera indica), pomegranate (Punica granatum) and betel nut (Areca catechu). The length of tiny larvae, fully-grown larvae, pupa, adult winged male moths, and wingless adult maggot-like females was 1.02 mm, 24.8 mm, 14 mm, 15 mm, and 48 mm, respectively. The average length of the bag was 24.7 mm with a range of 21-28 mm, and the average breadth in the middle of the bag was 6.9 mm with a range of 6-8 mm. The highest number of larval cases per branch was found in guava (56), and the lowest was in copperleaf (8). The highest percent of leaf damage (86.23%) per plant was also observed in the guava plant, and the lowest percent of leaf damage (37.46%) was in copperleaf. The highest number of infested leaves and bags per leaf was observed in the lower stratum of the guava branch, while the lowest infestation was in the top stratum. The highest percentage of leaf area (30%) damage was recorded 72 hours after release (HAR), and the lowest percentage of leaf area (10%) damage was at 24 HAR in guava. The maximum amount of leaf was consumed by bagworm larva at 72 HAR and the minimum amount was consumed at 24 HAR in guava. The maximum leaf area (13.46 cm2) consumption was recorded at 72 HAR, while the minimum amount (3.42 cm2) was consumed at 24 HAR. No significant damage by T. ephemeraeformis was observed in the case of mango, pomegranate, and betel nut plants. J. Asiat. Soc. Bangladesh, Sci. 48(1-2): 1-17, June-December 2022

PHENOTYPIC PERFORMANCE ANALYSIS OF YIELD AND GROWTH TRAITS FOR SELECTION OF SUITABLE MUNGBEAN (Vigna radiata L.) VARIETIES IN THE SOUTHERN REGION OF BANGLADESH

An experiment was conducted at the research farm of Patuakhali Science and Technology University (PSTU), Dumki, Patuakhali, during the period from January to April 2015 to evaluate the growth, development, and yield performance of seven mungbean varieties for obtaining the most productive variety suitable for Patuakhali region. The experiment was laid out in a Randomized Complete Block Design with three replicates. Among the varieties, BARI mung 4 showed better performance in respect of growth, development, and yield contributing characteristics compared to other varieties. The results showed better performance on growth characters namely, the number of leaves per plant (15.62), branches per plant (5.427), leaf area per plant (1079 cm2), and total dry matter weight per plant (9.64 g) were recorded in BARI mung 4. The highest seed yield recorded in BARI mung 4(1.69t ha-1) might be due to superior growth characteristics thereby seed yield. Besides, BARI mung 4 produced a pod number of 24.22 and the maximum number of seeds per pod (6.42). In contrast, the lowest seed yield was recorded in the local variety (0.81 t ha-1) for its inferior growth and yield contributing characters. Therefore, BARI mung 4 may be cultivated commercially in the southern region of Bangladesh.

Assessment of Health Status, Habit and Their Concomitant Effect on Mental and Intellectual Health of Pstu Students

The survey on the health status, hygienic condition, mental health and intellectual health of students of Patuakhali Science and Technology University (PSTU) was conducted

Effect of Different Mulches on Growth and Yield of Cauliflower in Southern Bangladesh

A field experiment was conducted at the research farm of Patuakhali Science and Technology University (PSTU), Patuakhali from November 2011 to April 2012 to find out the most adventitious mulch material for Cauliflower production. The experiment was laid out in Randomized Complete Block Design (RCBD) with four replications. Six different mulches (M) along with control were applied as treatment viz M0 =Control (without mulches), M1 =Black polythene, M2 =White polythene, M3 =Saw dust, M4 =Water hyacinth and M5 =Rice straw. Data were compared on plant height (cm); number of leaves/plant; leaf area (cm2)/plant; leaf area index (cm2); dry weight of root, leaf and stem (g/plant); total dry matter (g/plant); crop growth rate (g/m2/day); relative growth rate (g/cm2/day); diameter of curd (cm2); curd fresh weight (g/plant) and curd yield (t/ha). Significant variation was obtained in case of all the compared parameters among the treatments but water hyacinth mulch gave highest value compared to control and other mulches. Finally, it can be concluded that water hyacinth mulch was found most effective for cauliflower production under AEZ-13 of the southern part of Bangladesh.
 Environ. Sci. & Natural Resources, 13(1&2): 110-117, 2020

Genetic Diversity Analysis of Sapota (Manilkara Zapota) Germplasm by Rapd Marker

The experiment was carried out at the Department of Horticulture, Patuakhali Science and Technology University (PSTU), Bangladesh, during the period from October 2018 to April 2019. The genetic diversity of eight sapota germplasm viz. Gp-1, Gp-2, Gp-4, Gp-6, Gp-7, Gp-9, Gp-15 and Gp-17available at the Germplasm Center of PSTU using PCR based Random Amplified Polymorphic DNA (RAPD) marker were studied.By the PCR, the RAPD primers generated various bands ranging from 3 to 10 and yielded a total of 45 bands of which 42.12% were polymorphic.Comparatively higher genetic distance (0.28) was found between Gp-1 and Gp-9. The inter-population similarity index value was the highest (99%) between Gp-2 and Gp-9, Gp-4 and Gp-15.Among the germplasm, Gp-1 and Gp-17werethe most polymorphic with other sapotagermplasm. Interestingly, the leaf morphological features (length and width) were also found the highest in Gp-1 and Gp-17.
 Bangladesh J. Agril. Res. 45(2): 145-155, June 2020

Nutritional Assessment of Guava for Quality Jelly Production

Abstract Guava (Psidium guajava L.) is a Vitamin C (ascorbic acid) rich fruit. Its production is quite high in Bangladesh but post-harvest life is very short. Farmers will benefited by producing different guava products like juice, jelly etc. and selling them to market for year round. The current study has been carried out to observe the nutritional composition of fresh guava, guava juice, and jelly for nutritive jelly production. Shelf life and sensory evaluation of guava and guava jelly were also evaluated. Fresh green guava of four varieties (Swarupkathi Peyera, Kazi Peyera, BAU-2 Peyera and BAU-19 Peyera) were collected from the Germplasm Center, Patuakhali Science and Technology University (PSTU), Bangladesh. The shelf-life (mean value) of fresh Guava, Guava juice, and Jelly were about 11, 9, and 142 days in ambient condition; 24, 30, and 213 days in refrigerated condition; and 42, 142, and 325 days in freezing condition, respectively. Kazi Peyara confined the highest percentage of ascorbic acid (195.59 mg/100g FW), total sugar (10.65 % FW), calcium (17.45 mg/100g), and phosphorus (34.63 mg/100g). However, BAU-19 Peyara contains the highest percentage of magnesium (20.15 mg/100g) and BAU-2 Peyara contains the highest percentage of potassium (392.1 mg/100g). The mean ascorbic acid content in guava juice (29.23 mg/100ml) and jelly (17.65 mg/100gm) were significantly lower compared to the fresh guava (192.77 mg/100gm) and also the ascorbic acid loss during storage was significant. The average score of different sensory parameters for fresh guava and guava Jelly were within the standard range. From the results, it can be concluded that guava is a good source of nutrients and quality jelly could be prepared from it.

Incidence, Abundance and Damage of Papaya Mealybug In Southern Part of Bangladesh And Its Management

The papaya mealybug, Paracoccus marginatus Williams and Granara de Willink, is a small hemipteran that attacks several genera of host plants, including economically important tropical fruits and ornamentals. A study was carried out at farmers’ papaya garden and homestead areas of 8 locations viz., Dumki, Bouphal, Dashmina, Patuakhali, Mirjagonj, Amtali, Kalapara and Kuakata of Patuakhali and Barguna districts of Bangladesh to observe the incidence, abundance, and damage potential of papaya mealybug, Paracoccus marginatus (Williams and Granara de Willink) from March to June 2019. An experiment consisting of seven treatments following randomized complete block design (RCBD) with three replications was conducted for controlling papaya mealybugs at Patuakhali Science and Technology University (PSTU) campus during March to June 2019. Results revealed that among 8 locations, the highest incidence of P. marginatus was recorded in June, and the lowest was in April. The maximum abundance of P. marginatus on leaves and fruits of the papaya plant was observed at Kolapara, and the lowest was at Amtali. The highest percent infested plants (65%) per location, infested leaves/plant (97%), and infested fruits/plant (47%) was recorded in Kolapara, and the lowest percent infestations (31, 18, and 11%, respectively) were in Amtali. Among all treatments, the removal of infested leaves with petioles and application of Nitro 505EC @ 1 ml/L of water (T1) was the best approach for the management of papaya mealybugs. The removal of infested leaves with petioles + Biotap plus extra 95EC @ 0.2 g/L of water (T3) could be used as 2nd choice for controlling papaya mealybugs. The results concluded that removal of infested leaves and the application of Nitro 505 EC at the rate of 1 ml/L of water might be used to control the papaya mealybug. J. Asiat. Soc. Bangladesh, Sci. 47(2): 109-120, December 2021

Damage potential and control of the common mormon butterfly, Papilio polytes Cramer on citrus

Studies were conducted to know the damage potential and effect of insecticides on leaf area feeding and larval mortality of the common Mormon butterfly, Papilio polytes Cramer in the homestead garden and germplasm center of the Patuakhali Science and Technology University (PSTU) campus and in the laboratory, Department of Entomology, PSTU, Patuakhali, Bangladesh during October to December 2016. Ten Citrus host plants such as Kagoji lime-BAU-1, BAU-2, BAU-3, BAU-4, BARI kagoji, elachi lime, sweet orange, orange, jamir and pumelo were used as study materials. To determine the effects of insecticides on leaf area feeding and larval mortality, five treatments viz., T1 = Voliam flexi 300SC @ 0.5 ml/l of water, T2 = Voliam flexi 300SC @ 1.0 ml/l of water T3 = Bioneem Plus @ 0.5 ml/l of water, T4 = Bioneem Plus @ 1.0 ml/l of water T5 = control were applied. Under natural field conditions, the highest percentage of leaf infestation was recorded in orange, followed by BAU-3, BAU-4, malta and elachi lime, while the lowest percentage was in BARI kagoji on 23 and 30 November, 2016. At the top canopy, the highest percentage of leaf infestation was recorded in orange and elachi (56%), while the lowest was in BAU-4 (8%). At the middle canopy, the highest percentage of leaf infestation was recorded in orange (56%), while the lowest was in jambura (12%). At the lower canopy, the highest percentage of leaf infestation was recorded in BAU-3 (40%), while the lowest was in elachi (8%). At the top canopy, significantly the highest percentage of infested leaves per branch was observed in orange (51.39%) and the lowest percentage of infested leaves per branch was in BAU-4 kagoji lime (10.86%). At middle and lower canopies, no significant difference was observed in the percentage of infested leaves per branch among different citrus varieties. The lowest percentage (6%) of leaf area consumed by 4th instar larva was recorded in T2 (Voliam flexi 300SC @ 1.0 ml/l of water) treated leaf, while the highest percentage of leaf area consumption was found in T5 (control) at 3 HAT. The highest percent mortality (100%) of larvae was found in T2 treated citrus plant, while the lowest percent mortality was in the T3 (70%) treated plant. No mortality was recorded in the untreated control (T5) plant.
 J. Asiat. Soc. Bangladesh, Sci. 47(1): 35-46, June 2021

Bacterial content in fish, water, and sediments of different fish ponds in the Patuakhali Science and Technology University (PSTU) campus: a food safety aspect for the consumers in the PSTU

Bacterial content in fish, water, and sediments of different fish ponds in the Patuakhali Science and Technology University (PSTU) campus: a food safety aspect for the consumers in the PSTU

Interactive effects of irrigation and flobond on growth and yield of BRRI dhan29

The experiment was conducted at the Research Farm of Patuakhali Science and Technology University (PSTU), Patuakhali during the period from December-May of 2015 to evaluate the effect of irrigation and soil conditioner on growth and yield of BRRI dhan29. A modern HYV rice variety BRRI dhan29 was grown under four different frequency of irrigation viz., four times, six times, eight times and ten times with five rates of flobond(soil conditioner), viz., 0.0, 5.0, 10.0, 15.0 and 20.0 per plot. The experiment was laid out in a split plot design with four replications. Irrigation and rate of soil conditioner and their interaction significantly influenced the yield contributing and other crop characters. It was observed that the highest grain yield (7.08 t ha-1) was obtained from eight times irrigations, but the highest straw yield was obtained from ten times irrigations (6.706 t ha-1).The highest grain yield (7.21 t ha-1) was obtained with 10g Flobond per plot but the highest straw yield (6.29 t ha-1) was obtained with no Flobond. However, the highest grain yield (8.38 t ha-1) was obtained with eight times irrigation coupled with 10g of Flobond per plot as soil conditioner and the lowest one (5.5 t ha-1) was obtained in four times irrigation and no Flobond. So, eight times irrigation coupled with 10g of Flobond per plot as soil conditioner was the best combination for obtaining best yield.
 Progressive Agriculture 30 (2): 165-172, 2019

Performance of hybrid Boro rice in coastal area of Bangladesh

The present experiment was conducted at the research field of Patuakhali Science and Technology University (PSTU), Patuakhali to evaluate the Performance of hybrid boro rice (genotypes) in coastal area of Bangladesh. The experiment consisted of five rice varieties as treatment such as Arize Tej, Tea Sakti, Shathi and BRRI Dhan 28. Data were collected on morphological characters such as plant height, number of leaves plant-1 and leaf area hill-1, growth characters such as leaf area index (LAI), crop growth rate (CGR) and relative growth rate (RGR), yield and yield components such as number of effective tillers hill-1,number of non effective tillers hill-1, panicle length, number of filled grains panicle-1, number of unfilled grains panicle-1, 1000 grain weight, grain yield, straw yield, biological yield and harvest index (%) were recorded. The experiment was laid out in a completely randomized block design (RCBD) with three replications. The collected data were analyzed statistically and means were adjudged by DMRT at 5% level of probability. Among the five varieties the Arize Tej gave the highest performance. From the above investigated results, it was observed that the Arize Tej was the most efficient for better growth and higher yield of hybrid boro rice genotypes grown in coastal area of Bangladesh.
 Progressive Agriculture 30 (2): 186-193, 2019

Study on growth and yield of mungbean in southern part of Bangladesh

An experiment was carried out at the field laboratory of the Department of Agricultural Botany, Patuakhali Science and Technology University (PSTU), Patuakhali during the period from January to March, 2012 to study the effect of mugbean genotypes on growth, development, morpho-physiological, yield and yield attributing characters under the agro ecological Zone (AEZ-13) in the region of Southern part of Patuakhali District. Five hybrid genotypes of mugbean viz., Local variety (V1), BARI mung 5(V2), BINA mung 5(V3), BARI mung 6(V4) and BINA mung 8(V5) were used as planting materials for this study. Among the genotypes, BINA mung 5 showed significantly better performance on growth, yield and morpho-physiological characters compare to other genotype during this study while local variety were less efficient among those parameters. As a result, the tallest plant of 57.020 cm higher TDM (72.538 g/plant) and LA (421.152 cm2) were recorded in BINA mung 5 at harvest. BINA mung 5 also had higher number of seeds per pod (13.25), 1000 seeds weight (52.495g), grain yield (1.997t/ha), straw yield (3.660t/ha), biological yield (5.657t/ha) and harvest index (35.303%). On basis of these findings, BINA mung 5 was the most productive variety under the coastal area.
 Progressive Agriculture 29 (4): 313-319, 2018

Effect of nitrobenzene on growth and yield of boro rice

The present experiment was conducted at the research field of Patuakhali Science and Technology University (PSTU), Patuakhali during the period from December 2013 to March 2014 to evaluate the effect of Nitrobenzene as plant growth regulators on growth and yield parameters of Boro Rice. It also observed the comparative growth and yield performance of foliar application Nitrobenzene ( 0, 1.0, 3.0 and 5.0 ml L–1). Data were collected on Plant height; number of leaves plant–1; number of total, effective and non–effective tillers hill–1; leaf area (LA); leaf area index (LAI); total dry matter (TDM); Crop and relative growth rate (CGR and RGR); and Yield and yield contributing characters such as length of root; length of panicle; number of total, sterile and non–sterile spikelets panicle–1; 1000–grain weight; grain, straw and biological yield and harvest index (HI). The experiment was laid out in a completely randomized block design (RCBD) with three replications. The collected data were analyzed statistically and means were adjudged by DMRT at 5% level of probability. The treatments Nitrobenzene @ 3.0 ml L–1 as foliar application gave the highest performance in respect of plant height (90.39 cm), LAI (3.514), TDM (19.17 g plant–1), effective tiller (20.33 hill–1), total tillers (22.73 hill–1), panicle length (26.01 cm),non sterile spikelets (134.70 panicle–1), total spikelets (155.80 panicle–1), 1000–grain weight (28.21 g), grain yield (5.86 t ha–1), straw yield (8.44 t ha–1), biological yield (14.29 t ha–1) and HI (41.00%) of boro rice.
 Progressive Agriculture 29 (4): 304-312, 2018

Performance of concentrated cropmax on growth and yield of mungbean

The present study was conducted at the research field of Patuakhali Science and Technology University (PSTU), Patuakhali during the period from December 2013 to March 2014 to study on the effect of a concentrated fertilizer (Cropmax) on the growth and yield the Mung bean. It also observed the comparative growth and yield performance of foliar application Cropmax ( 0, 2.0, 3.0 and 5.0 ml L–1) . Data were collected on plant height, leaf per plant, branches per plant, length of root, leaf area, dry weight of shoot, dry weight of root, TDM, AGR, CGR and RGR, number of pod per plant, pod length, number of seed per pod, thousand seed weight, grain yield (t ha–1), straw yield (t ha–1), biological yield (t ha–1) and harvest index (%) etc.The experiment was laid out in a completely randomized block design (RCBD) with three replications. The collected data were analyzed statistically and means were adjudged by DMRT at 5% level of probability. The treatments Cropmax @ 3.0 ml L–1 as foliar application gave the highest performance in respect of all growth and yield parameters.
 Progressive Agriculture 29 (3): 239-247, 2018

Standardization of plant growth regulators for successful tissue culture of sweet potato

The experiment was carried out during the period from June 2016 to January, 2017 at the Plant Biotechnology Laboratory, Department of Horticulture, Patuakhali Science and Technology University (PSTU) for in vitro regeneration of sweet potato. In this study, the nodal segment explants and different combinations of growth regulators were used for in vitro regeneration of sweet potato. BAP (6-benzylamino purine) and KIN (Kinetin) were used for in vitro shoot regeneration and IBA (Indole-6- Butyric Acid) with NAA (Naphthalene Acetic Acid) were used for in vitro root regeneration. The highest percentage of shoot initiation (91.30), the minimum number of days (9.00) for shoot initiation, the highest number of shoot/plantlet (11.00) and the highest shoot length (4.38 cm) was observed when nodal segment explants cultured on MS medium supplemented with BAP 1.5 mg/L + KIN 0.1 mg/L. On the other hand, the highest root initiation percentage (94.12), the minimum number of days (6.00) for root initiation, the highest number of root/plantlet (9.33) and the highest root length (11.13 cm) was observed in the MS medium supplemented with IBA 0.5 mg/L + NAA 0.1 mg/L. Regenerated plantlets were acclimatized for 5 days and adopted in soil by 6-7 days of transplantation.J. Bangladesh Agril. Univ. 16(2): 178-181, August 2018