Year 2022

Browse

Search Results

Now showing 1 - 10 of 27

ENHANCEMENT OF SALT TOLERANCE IN RICE THROUGH PLANT GROWTH-PROMOTING RHIZOBACTERIA
(DEPARTMENT OF AGRONOMY, 2022) SIDDIKA, AYESHA
The ongoing expansion of global salt-affected land is a significant factor limiting crop growth and yield, particularly for rice. This experiment explores the mitigation of saltinduced damage on rice (Oryza sativa L. cv BRRI dhan100) by applying plant growthpromoting rhizobacteria (PGPR) cultures. This experiment followed a completely randomized design (CRD) and experimental duration was December 2022 to May 2023. where rice seedlings, five and six weeks post-transplanting, were subjected to salt stress via two treatments with 50 and 100 mM NaCl at seven-day intervals. Bacterial cultures, comprising endophytic PGPR strains (Bacillus subtilis and B. aryabhattai) and an epiphytic PGPR strain (B. aryabhattai), were administered at three critical stages: during transplantation of 42-d-old seedlings, five weeks later at the vegetative stage at 35 days after transplanting (DAT), and seven weeks later at 49 DAT during panicle initiation stage. Salt stress prompted osmotic, ionic, and oxidative stress in rice plants, causing a dose-dependent decrease in relative water content, chlorophyll content, stomatal conductance, chlorophyll fluorescence, IAA concentrations, and various growth parameters. Furthermore, osmotic stress escalated the hydrogen peroxide content and proline accumulation, while ionic stress disrupted ion balance by increasing Na + and reducing K + content. Both types of stress generated reactive oxygen species, impairing the antioxidant defense system and causing oxidative damage, visible in heightened malondialdehyde levels and electrolyte leakage. PGPR treatment alleviated these negative effects by enhancing osmotic and ionic balance, demonstrated by improved water balance and reduced Na + content and Na + /K + ratio. Additionally, PGPR fortified the antioxidative defense system in salt-exposed rice plants by increasing ascorbate and glutathione levels. The introduction of PGPR led to enhancements in yield attributes (including effective tillers per hill, panicle length, rachis per panicle, filled grains per panicle, and 1000-grain weight), consequently boosting the grain yield per hill. In conclusion, this research highlights the potential of PGPR to bolster physiological and biochemical functionality in rice, serving as an effective buffer against salt stress-induced damage
INFLUENCE OF HERBICIDES ON GROWTH, YIELD AND CONTROLLING WEEDS IN DIRECT-SEEDED AUS RICE
(DEPARTMENT OF AGRONOMY, 2022) SEBA, MOST. ISRAT ZAHAN
A field experiment was carried out at the Agronomy field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh, from March to August 2022, to investigate the efficiency of herbicides against weeds and influence on growth, yield and yield contributing parameters of direct-seeded rice aus rice of Bangladesh. The experiment consisted of 13 treatments viz., Unweeded (control), partial weeding (two-hand weeding at 20 and 40 Days After Sowing), weedfree, Butachlor (25 kg ha -1 ), Pendamethyline (2 L ha ii -1 ), Pretilachlor (1 L ha ), BispyribacSodium (25 g ha -1 ), Butachlor (25 kg ha -1 ) + Bispyribac-Sodium (25 g ha -1 ), Pendamethyline (2 L ha 1 -1 ) + Bispyribac-Sodium (150 g ha -1 -1 ), Pretilachlor 6% + Pyrazosulfuron- ethyl 0.15% (2 kg ha ), Pretilachlor 30% + Pyrazosulfuron- ethyl 0.75% (2 kg ha -1 ), Acitachlor 14% + Bensulfuron methyl 4% (3 kg ha -1 ), 2, 4-D Amine (2.24 L ha -1 ). The test rice variety was BRRIdhan 98. The experiment was laid out in a randomized complete block design having 3 replications. Seeds were sown directly on 29 March 2022. Seventeen weed species infested the experimental field belonging to 10 families, where the most dominating were broadleaf and grass weed species. Among the weeds, Digitaria ischaemum was the most dominant weed at 20, 40, and 60 DAS, followed by Physalis heterophylla and Digitaria sanguinalis. The sequential application of Pendimethalin and Bispyribac-Sodium herbicides treated plots recorded minimum weed density m -2 (0.0, 2.33, and 4.00) and weed dry weight (0.00, 0.57, and 1.25 g) at 20, 40, and 60 DAS, respectively. The highest weed control efficiency (100, 88.46 and 80.66 %) at 20,40 and 60 DAS among all herbicidal treatments and also the highest weed control index (97.31 and 99.16%, respectively) at 60 and 90 DAS. Among the weed management practices weed-free and partial weeding notably reduced the weed counts, higher growth and yield attributes and grain yields. It was statistically at par with applying Pendamethyline (2 L ha -1 ) followed by Bispyribac-Sodium (25 g ha -1 ), which ultimately gave the highest grain yield was obtained from weed free treatment followed by partial weeding. But from economic view of point, partial weeding and Pendimethalin + Bispyribac-sodium showed almost similar benefit-cost ratio.Therefore, Pendamethyline (2 L ha -1 ) and Bispyribac-Sodium (25 g ha -1 ) were found as the best broadspectrum effective herbicides to manage the various weed flora in direct-seeded aus rice.
INFLUENCE OF SEEDLING LEAF CLIPPING AND PLANT SPACING ON GROWTH AND YIELD OF BRRI Dhan80
(DEPARTMENT OF AGRONOMY, 2022) HOSSAIN, MD. SAGAR
A field experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka during the Aman season of June to November 2021, to the study influence of seedling leaf clipping and plant spacing on growth and yield of BRRI dhan80. The experiment was consisted of two factors, and followed Randomized Complete Block Design with three replications. The factors were as Factor A: Seedling leaf clipping (3) viz; C = No seedling clipping, C 1 = Top 1/3 rd portion clipping, C 2 = Top 1/2 nd portion clipping and Factor B: Different plant spacing (4) viz; S 1 = 25 cm × 25 cm, S 2 = 25 cm × 20 cm, S = 20 cm × 20 cm and S = 20 cm × 15 cm. Experimental results revealed that, growth and yield of aromatic rice significantly influenced due to seedling leaf clipping. The highest panicle length (23.79 cm), filled grains panicle 4 -1 (130.52), 1000-grain weight (24.43 g), grain yield (4.59 t ha -1 ), straw yield (5.99 t ha -1 ), biological yield (10.58 t ha ) and harvest index (43.29 %) were observed from C (No seedling clipping) treatment. In the case of different plant spacings, the highest panicle length (24.01 cm), filled grains panicle -1 0 (134.10) and 1000-grain weight (24.82 g) were observed in S (25 cm × 25 cm) treatment. However, the highest grain yield (4.61 t ha -1 1 ), straw yield (6.04 t ha ), biological yield (10.66 t ha -1 ) and harvest index (43.22 %) were observed in S (20 cm × 15 cm) treatment. In the case of treatment combination, C 0 S (No seedling clipping along with 20 cm × 15 cm plant spacing) gave the highest grain yield (5.11 t ha 4 ), straw yield (6.32 t ha -1 ), biological yield (11.42 t ha -1 ) and harvest index (44.71 %) whereas the lowest of these values were observed from C 2 S 1 combination (Top 1/2 nd portion seedling clipping along with 20 cm × 15 cm plant spacing). Based on the above findings, it would be considered that no seedling leaf clipping treatment along with 20 cm × 15 cm plant spacing (C 0 S ) would be helpful to enhance better grain yield production of BRRI dhan80.
ROLE OF ORGANIC AMENDMENTS ON MORPHOPHYSIOLOGY OF RICE UNDER ARSENIC STRESS
(DEPARTMENT OF AGRONOMY, 2022) KHATUN, MST. MAHBUBA
Our study investigated the arsenic induced stress of morpho-physiology in rice plant and the role of organic amendments; cowdung, vermicompost, biochar to mitigate the damages. Rice seedling was grown in 18L pot with 4 arsenic treatment at 21DAT, 32DAT, 42DAT and 52DAT. Sodium Arsenate (0.5Nm, Na 2 HAsO 4 ) considered as As 1 and Sodium (meta) arsenite (0.5Mm, NaAsO 2 ) considered as As 2 and 1.5kg cow-dung, 600g vermi-compost and 500g biochar used as protectant. Plant height, leaf number, leaf area, tiller no. hill , chlorophyll content data are collected from 35DAT to 49 DAT with 7 or 15days interval. Relative water content, shoot and root fresh weight and dry weight data are recorded at 42DAT. The highest plant height was found at control condition at 35DAT, 42DAT and 49DAT. In case of As 1 at all the DAT, vermicompost shows the highest result of plant height and in As 2 condition biochar shows the highest plant height. Also these amendments increased the fresh and dry weight of shoot and root of rice plants. All parameters decreased significantly at 0.5 mM of arsenic stress. For both As 1 and As 2 treated plants combined with vermicompost and biochar shows an increasing percentage at all the yield contributing data parameters compare to As 1 and As 2 treated plant only. Our experiment concludes that rice plant under arsenic stress, vermicompost shows the better percentage of increasing result when plant expost to As 1 (0.5 mM; Sodium arsenate, Na 2 HAsO 4 ) and in case of As 2 (0.5 mM; Sodium meta arsenite, NaAsO 2 ) biochar shows an increasing result compare to all the treatments
INFLUENCE OF ORGANIC AND INORGANIC FERTILIZER MANAGEMENT ON GROWTH AND YIELD OF MAIZE
(DEPARTMENT OF AGRONOMY, 2022) REZAUL, RUBAYA BINTE
A field experiment was conducted at Sher-e-Bangla Agricultural University Farm SAU, Dhaka during the period from December 2020 to April 2021 in Rabi season to study influence of organic and inorganic nutrient management on growth and yield of maize. The experiment consisted of two factors followed by split plot design with three replications. Factor A: Variety viz (2); V 1 = SAU-984 (Advance line) and V 2 = Pioneer 3355 (Maize genotype). Factor B: Fertilizer application rate viz (6); T 1 = 100% RDF (Urea+ TSP+ MoP+ Gypsum+ ZnS+ Boric Acid), T 2 = 100% Biochar, T 3 = 100% Biochar + 50% RDF, T 4 = 100% Biochar + 75% RDF, T 5 = 50% Biochar + 50% RDF and T 6 = 100% Biochar + 100% RDF. Data was taken during growth and harvest. The experimental results revealed that different varieties, fertilizer dose and their combination significantly influenced the growth, yield contributing characteristics and yield of hybrid maize. In case of different hybrid variety, the V 2 [Pioneer 3355 (Maize genotype)] recorded the highest grain yield (12.035 t ha -1 ), stover yield (14.248 t ha -1 ), biological yield (25.986 t ha ) and harvest index (45.143%) comparable to the other variety. In case of different fertilizer doses the highest grain yield (12.542 t ha -1 ), stover yield (14.982 t ha ), biological yield (27.532 t ha -1 ) and harvest index (45.573%) were observed in T 6 (100% RDF + 100% Biochar) treatment comparable to other treatments. In case of combined effect, the V 2 T 6 treatment combination had the highest grain yield (12.827 t ha -1 ) followed by V 1 T 6 (11.957 t ha -1 ) treatment combination. Hence, it was concluded that growing hybrid maize with the use of 100% Biochar and 100% of the recommended fertilizer dose will improve the yields of both Pioneer 3355 (Maize genotype) and SAU-984 (Advance line) but Pioneer 3355 (Maize genotype) will provide more production than SAU-984 (Advance line).
REPRODUCTIVE FITNESS AND PHENOLOGY RESPONSES OF SAU PERILLA-1 TO GROWING DEGREE DAYS OBSERVED ON DIFFERENT TRANSPLANTING DATES
(DEPARTMENT OF AGRONOMY, 2022) KATHA, JANNATUL FERDOUS
SAU Perilla-1 (Golden Perilla BD) is a latest oil crop variety enriched with Omega-3 fatty acid, which is introduced by Sher-e-Bangla Agricultural University in 2021. The seed contains ⁓40% edible oil and is recommended for growing in Kharif-2 season when no oil crop is grown in Bangladesh. However, for Robi seasonal trail, the crop was sown on 21 November (D 1 ), 28 November (D 2 ), 05 December (D 3 ), and 12 December (D 4 ) with 40 cm × 40 cm (S 1 ), 40 cm × 30 cm (S 2 ), and 40 cm × 20cm (S 3 ) planting configurations maintained in each of the dates. The research was aimed mainly on thermal effects on phenological parameters (germination, flowering and biological yields) as evaluated by the Growing Degree Days (GDD) and Heat Use Efficiency (HUE) over stover yield and grain yield of SAU Perilla-1. The results revealed that sowing dates had significant effect on the yield variations as evaluated by the studied parameters of the crop. However, D 2 showed the uppermost level of seed weight per plant. The highest seed weight per plant was recorded due to the effect of S 3 and that of the value touched at the bottom for S 2 . The maximum seed weight was recorded in D 2 S 3 and that of the lowest was found in D 4 S 3 . The GDD values increased with increasing days to germination of seeds. Sowing date strongly influenced the GDD requirement for germination of SAU Perilla-1. When the crop was sown on D 1 , 75 days were needed accumulating 1670.4 ℉ for flowering of the crop. The GDD requirement was highest (1802℉) in D 4 sowing treatment, when 82 days were required to initiate flowering. The GDD requirement declined as sown on D 2 dates. The results indicated that the variation in temperature prevailed under different dates of sowing. HUE was higher in producing stover plant when sown on 21st November (D 1 ) with second highest grain production (4.10 mg/plant//℉/Day). Contrary to that the highest HUE for grain (8.13 mg/plant//℉/Day) was yielded in D 2 sowing date although the stover production was reduced from that of D 1 treatment found. When sowing is delayed, either of grain and stover synthesis were lowered down as found in D 3 and D 4 treatments
EFFECT OF LEAF CLIPPING ON PRODUCTIVITY UNDER DIFFERENT POPULATION DENSITIES OF HYBRID MAIZE
(DEPARTMENT OF AGRONOMY, 2022) AFROZ, EVANTA
A field experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka during the period from October-2021 to February-2022 in Rabi season, to study the effect of leaf clipping at reproductive stage on productivity under different population densities of hybrid maize. The experiment consisted of two factors, and followed Randomized Complete Block Design (RCBD) with three replications. Factor A: Population density (4 levels) viz: P 1 = 60 cm × 15 cm (1,10,000 plants ha -1 ), P = 60 cm × 20 cm (83,000 plants ha 1 -1 ), P 3 = 60 cm × 25 cm (66,500 plants ha ) and Factor B: Leaf clipping (4 levels) viz: C -1 ) and P 1 4 2 = 60 cm × 30 cm (55,500 plants ha = Control (no clipping), C = Clipping of uppermost 2 leaves, C 3 = Clipping of uppermost 4 leaves and C = Clipping of uppermost 6 leaves. Experimental result revealed that, in case of different population densities of maize, the cob length (15.64 cm), cob diameter (4.82 cm), number of rows cob 4 (4.82), number of grains cob -1 (385.04), grain weight plant -1 (107.07 g) and 100-grain weight (22.45 g) of maize were observed in P 4 (55,500 plants ha -1 ) treatment. However, the highest grain yield of maize (8.27 t ha -1 ) was observed in P 2 2 -1 (83,000 plants ha ) treatment. Growth and yield of maize were significantly influenced due to the effect of leaf clipping at reproductive stage on maize. The highest cob length (15.02 cm), cob diameter (4.69 cm), number of rows cob -1 (14.33), number of grains cob (352.65), grain weight plant -1 (98.00 g), 100-grain weight (21.97 g) and grain yield (7.44 t ha ) were observed in C 1 (no clipping) treatment. In case of combination, the P combination treatment gave the highest grain yield of maize (8.53 t ha -1 ). Based on the above findings, experimental results revealed that different population densities and leaf clipping on maize at reproductive stage significantly influenced the growth and yield of maize. Therefore, it was suggested that planting 83,000 plants ha -1 along with no leaf clipping (P 2 C ) combination treatment would help to influence plant growth and increase its ability to give better yield production of maize.
EFFECT OF MAIZE-LEGUMES INTERCROPPING ON GROWTH AND YIELD OF MAIZE
(DEPARTMENT OF AGRONOMY, 2022) TUSHAR, MAHFUZUL KARIM
A field experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka during the period from October-2021 to February-2022 in Rabi season, to study the effect of maize-legumes intercropping on growth and yield of maize. The experiment consisted of single factors, and followed Randomized Complete Block Design (RCBD) with three replications. Four intercropping systems viz: T 1 = sole hybrid maize, T = hybrid maize + soybean, T 3 = hybrid maize + grasspea and T 4 2 = hybrid maize + soybean + grasspea were used in this study. Significant differences in maize growth, yield attributes and yields were found among the various intercropping systems. The highest plant height of maize (223.11 cm), total dry matter plant -1 (186.93 g), cob length (16.27 cm), cob diameter (5.03 cm), number of rows cob -1 (15.99), number grains cob -1 (420.66), grain weight plant -1 (109.19 g), 100-grain weight (23.42 g) were observed in T (sole hybrid maize cropping). However, the highest systematic grain yield (9.37 t ha 1 -1 ), systematic stover yield (17.11 t ha -1 ) and systematic biological yield (26.48 t ha -1 ) were observed in T (maize + soybean + grasspea) treatment, while the lowest systematic grain yield (7.97 t ha -1 ), systematic stover yield (11.77 t ha -1 ) and systematic biological yield (19.74 t ha ) were observed in T (sole maize). In terms of economic return, the highest benefit-cost ratio (BCR) was observed in T 1 (maize + soybean + grasspea), while the lowest benefitcost ratio (BCR) was observed in T 4 (sole hybrid maize cropping). Therefore, the result suggested that maize + soybean + grasspea intercropping system was found to be the best intercropping system for higher grain production.
EFFECT OF Zn AND Mn ON GROWTH AND YIELD OF SUNFLOWER UNDER SALT STRESS CONDITION
(DEPARTMENT OF AGRONOMY, 2022) AKTER, MOHUA
An experiment was conducted in pot house of Sher-e-Bangla Agricultural University, Dhaka during November 2021 to March 2022 to evaluate the effect of foliar application of Zn and Mn on the growth, yield contributing characters and yield of BARI Sunflower 2 under saline stress conditions. The experiment consisted of two factors as factor A; S 0 = Control, S 1 = 10 ds/m NaCl and S 2 = 20 ds/m NaCl; factor B; T 0 = water spray, T 1 = 0.5% Zn spray, T 2 = 0.5% Mn spray and T 3 = 0.5% Zn spray + 0.5% Mn spray. The experiment was laid out in a Randomized Completely Block Design with three replications. Different growth and yield contributing traits, viz. plant height (cm), number of leaf, head diameter (cm), head weight (g), number of seed head -1 1 ) were studied. Treatment S 0 , 1000 seed weight (g) and yield (t ha (Control) produced the tallest plants at 30, 45 and 60 DAS (36.87, 49.50 and 85.33 cm) compared to other two levels of salinity. The treatment S 2 (20 ds m -1 NaCl) produced the shortest plant at 30, 45 and 60 DAS (31.67, 44.70 and 74.33 cm). The reproductive growth in the sunflower was higher for Zn and Mn spray rather water spray. The lowest yield (1.53 t ha ) was recorded in T 0 treatment. In treatment combination of zero saline and 0.5% Zn spray + 0.5% Mn spray (S 0 T 3 ) gave highest yield (2.93 t ha ), which was significantly higher than 20 ds/m NaCl and water spray (S 2 T 0 -1 ) (1.20 t ha ). Higher salinity level leads to the reduction of plant vegetative growth whereas, foliar spray of Zn and Mn compensate this trend significantly. The results indicated that foliar application of Zn and Mn was significantly improved the yield contributing parameters despite the effect of different level of salinity.
RESPONSE OF GROUNDNUT TO DIFFERENT LEVELS OF NITROGEN AND BORON FERTILIZER
(DEPARTMENT OF AGRONOMY, 2022) TUMPA, SANJIDA ISLAM
The experiment was carried out at the Agronomy field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during April 2021 to August 2021 to determine the effect of nitrogen and foliar boron fertilizer on growth and yield of groundnut cv. BARI cheenabadam-10. The experiment consisted of two factors; Factor A: Nitrogen (4 levels) viz., N 1 : 0 kg urea ha -1 (control), N 2 : 25 kg urea ha -1 , N 3 : 30 kg urea ha and N 4 : 35 kg urea ha -1 , and factor B: Foliar boron levels (4 levels) viz., B : 0.1% boric acid (5 kg boric acid ha -1 ), B 3 1 : 0.2% boric acid (10 kg boric acid ha ) and B 4 : 0.3% boric acid (15 kg boric acid ha -1 ). The experiment was laid out in Split-plot design with three replications. Plant length, number of leaves plant , number of branches plant -1 , number of pods plant -1 , pod length, pod yield plot , 100 seeds weight, pod yield, kernel yield, stover yield, biological yield and harvest index were compared among the combinations and individual effects of treatments. Results indicated that, nitrogen and foliar boron application had significant influence on most of the growth, yield and yield contributing characters of groundnut. The maximum pod yield (2.09 t ha -1 ) and kernel yield (1.58 t ha -1 ) was obtained from N treatment and the minimum pod yield (1.56 t ha -1 ) and kernel yield (0.98 t ha -1 3 -1 : Control, B -1 -1 -1 ) was obtained from N treatment. In the case of foliar boron application, the maximum pod yield (2.02 t ha ) and kernel yield (1.49 t ha -1 ) was obtained from B treatment and the minimum pod yield (1.64 t ha -1 ) and kernel yield (1.10 t ha -1 3 ) was obtained from B treatment. In case of combined effect of nitrogen and foliar boron level, it was revealed that when groundnut was grown on 30 kg urea ha -1 1 with foliar boron spray @0.2% resulted with the highest pod yield (2.37 t ha -1 ) and kernel yield (1.81 t ha -1 ). The lowest pod yield (1.49 t ha -1 ) and kernel yield (0.92 t ha -1 ) was obtained from the treatment combination N 1 B (control). So, concluded from the above study that the treatment combination N 3 B 1 3 (groundnut growing on 30 kg urea ha -1 with foliar boron spray @ 0.2%) was found to be most suitable combination for the potential pod yield and kernel yield of groundnut.

Year 2022

Browse

Filters

Settings

Sort By

Results per page

Search Results