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Effect of European bee-eater (Merops apiaster) on honeybee colonies in Toshka region, Egypt Полный текст
2018
Nageh Sayed Omran; Abdel Rahman Gamaleldin Abde Rahman; Abd El-Aleem* S.S. Desoky and Mahmoud Mohamed Kelany
The experiment was carried out in the apiary at Toshka region (Southwest of Egypt) during the period from the end of March to the first of October, 2015. To study the effect of European bee-eater on the areas of brood and stored pollen (inch2/colony) for two-hybrid of Carniolan honeybee and a hybrid of Italian honeybee races in Toshka region. Bee-eater was appeared in two periods the first time at the first of April to June and the second at the first of September to Mid-September. Positive correlations were found between the increase of bee-eaters number and the decrease of brood area and pollen stored in the two honeybee races. The highest average numbers of bee-eater was recorded in May (37.2) bird that caused less brood area for both worker brood in Italian honeybee race was (146.2 sq. inch,/colony), and Carniolan honeybee race was (147.2 (sq. inch,/colony), and the lowest average area of stored pollen was recorded in the period of bee-eater increasing that was (22.0 sq. inch,/colony) for Italian race and (17.3 sq. inch,/colony) for Carniolan race. In September, the second period of bee-eater appearance was effected to both of brood and stored pollen areas for the two races, due to the high temperatures after July and August. Thus, the effect of bee-eater in Toshka region on two periods at the beginning of April and the end of June and the second period at the beginning of September until the middle of September. Therefore, Toshka region which is in the far south of Egypt is the first warning line to enter the immigrant European bee-eater.
Показать больше [+] Меньше [-]Comparative study of some indigenous crops with cereals (wheat and rice) in hilly areas of Uttarakhand (Western Himalaya) with special reference to their nutrients Полный текст
2018
P.S. Chauhan
Traditional crops were frequently cultivated before two decades in hilly areas of Uttarakhand and economy of the local peoples depends on the production of these crops. But now a day’s migration and climate change is two major problems which affecting the farming system of these crops. When people migrate, their lands quickly turn barren because weeds and shrubs take root and are difficult to remove. Even peoples who are staying there, they are not interested to do the farming of such crops due to typical geographical situation. They depend on market for rice and wheat. Some indigenous crops i.e. A. hypochondriacus, E. coracana, E. frumentacea, S. italica and F. tataricum were selected for the present investigation. Chemical compositions i.e. protein, carbohydrates, mineral, fiber etc. of all the selected crops have been analyzed and their nutrient percentage was compared with rice and wheat. Study showed that the nutrition percentage in indigenous crops was higher than rice and wheat. Maximum 410±22.0 kilo calorie energy was observed in A. hypochondriacus in comparison to wheat (346±21.34) and rice (345±21.33). Calcium (222±11.78 mg/100gm) and iron percentage (13.9±.99mg/100gm) was also higher recorded in same crop. However protein percentage in F. tataricum was higher (12±.98gm/100gm) in comparison to wheat (11.8±.97) and rice (6.8±.09gm/100gm). Overall higher nutrient content was recorded in selected millets in comparison to wheat and rice.
Показать больше [+] Меньше [-]Effect of integrated nitrogen application on the yield of two Boro rice varieties: BRRI dhan29 and BRRI dhan74 Полный текст
2018
Mst. Shirin Akter | Sabina Yeasmin | Ahmed Khairul Hasan
This study aimed to evaluate the effect of integrated nitrogen (N) application on the yield of Boro rice. The experiment was composed of two rice varieties: BRRI dhan29 and BRRI dhan74, and eleven N management approaches: control (without N), 100% varietal recommended dose (RD) of N from urea, 75% of RD from urea + 25% of RD from poultry manure (PM), 50% of RD from urea + 50% of RD from PM, 25% of RD from urea + 75% of RD from PM, 75% of RD from urea + 25% of RD from vermicompost (VC), 50% of RD from urea + 50% of RD from VC, 25% of RD from urea + 75% of RD from VC, 75% of RD from urea + 25% of RD from cowdung (CD), 50% of RD from urea + 50% of RD from CD and 25% of RD from urea + 75% of RD from CD. Performance of BRRI dhan74 was better compared to BRRI dhan29 in terms of yield. For both verities, application of 75% of RD from urea + 25% of RD from PM produced the highest grain yield (BRRI dhan74: 3.30 t ha-1 and BRRI dhan29: 3.08 t ha-1) and the lowest with control among the N management approaches. Thus, it can be suggested that integrated N application with 75% of varietal RD from urea and 25% from PM in Boro rice cultivation will produce appreciable grain yield and also expected to have positive effect on soil health.
Показать больше [+] Меньше [-]Effect of age of seedlings on the performance of drought tolerant Aman rice cultivars Полный текст
2018
Shakil Hosain | Sarmin Akter | Narayan Chakraborty | Safayet Hossen | Kawsar Hossen | Md. Golam Rabbani
An experiment was conducted at the Field Laboratory of the Department of Agriculture, Noakhali Science and Technology University (NSTU), Sonapur, Noakhali, from July 2017 to December 2017 to study the effect of variety and age of seedling on yield performance of drought tolerant transplant aman rice. The experiment consisted of three varieties viz. BINA dhan7, BRRI dhan56 and BRRI dhan71 and five different ages of seedling viz.15 days old, 20 days old, 25 days old, 30 days old, and 35 days old. The experimental design was randomized complete block design (RCBD) with three replications. Among the three varieties, BRRI dhan71 produced the highest grain yield (5.567 t ha-1) and the lowest grain yield (4.975 t ha-1) was obtained from BRRI dhan56. Among the five ages of seedlings, the highest grain yield (5.502 t ha-1) was obtained from 35 days old seedling and the lowest grain yield (5.092 t ha-1) was obtained from 15 days old seedling. In case of interaction between variety and spacing, the highest grain yield (5.723 t ha-1) was obtained from BRRI dhan71 with 35 days old seedling and the lowest (4.730 t ha-1) was obtained from BRRI dhan56 with 15 days old seedling. The result reveals that relatively older seedlings (35-days old) produce higher grain yield compared to the younger ones.
Показать больше [+] Меньше [-]In vitro propagation of two strawberry (Fragaria ananassa Duch.) cultivars of Bangladesh Полный текст
2018
Tapati Roy | S.M. Abdullah Al Mamun | Md. Monirul Islam
An experiment on in vitro propagation of strawberry was carried out at Plant Breeding and Biotechnology Laboratory of Agrotechnology Discipline, Khulna University, Khulna, Bangladesh during the period of February to November, 2015. In the experiment, runners of two strawberry cultivars viz. BARI Strawberry-1 and Modern Strawberry-5 (Festival) were cultured on MS media supplemented with different concentrations of BAP (1.0, 1.5 and 2.0 mgL-1) and Kin (0.1, 0.5 and 1.0 mgL-1) for multiple shoot regeneration. The experiment was laid out in Completely Randomized Design (CRD) with three replications. The highest number of shoots (10.41) was obtained from Modern Strawberry-5 and maximum shoot length (13.62 mm) obtained from BARI Strawberry-1. Maximum number of shoots (13.33) and shoot length (24.29 mm) were recorded from MS media containing 1.0 mgL-1 BAP and 1.0 mgL-1 Kin. Then all the regenerated plantlets were cultured on MS media containing 2.0 mgL-1 IAA for root initiation. Greater reduction in vigor was observed in Modern Strawberry-5 (Festival) when they were transferred to root induction media. Ex vitro survivability of the complete plantlets varied from 36.67 to 6.67%. Maximum survivability of both varieties 36.67% (BARI Strawberry-1) and 26.67% (Festival) were recorded from MS media supplemented with 1.0 mgL-1 BAP and 1.0 mgL-1 Kin. For in vitro micropropagation, BARI Strawberry-1 may be better and MS media supplemented with 1.0 mgL-1 BAP and 1.0 mgL-1 Kin may be better.
Показать больше [+] Меньше [-]Effect of plant spacing and integrated nutrient management on the yield performance of Binadhan-14 Полный текст
2018
Roshida Yasmin | Swapan Kumar Paul | Shabuj Chandra Paul | Muhammad Salim
An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from June to December 2014 with a view to finding out the effect of plant spacing and integrated nutrient management on the yield of Binadhan-14. The experiment consisted of three spacing viz., 25 cm × 15 cm, 20 cm × 20 cm and 20 cm × 15 cm and seven nutrient management viz., recommended dose of inorganic fertilizer @ 180-150-70-65-8 kg ha-1 of Urea-TSP-MoP-Gypsum-ZnSO4 respectively, cowdung @ 10 t ha-1, poultry manure @ 5 t ha-1, 50% recommended dose of inorganic fertilizer + cowdung @ 5 t ha-1, 50% recommended dose of inorganic fertilizer + poultry manure @ 2.5 t ha-1, 50% recommended dose of inorganic fertilizer + cowdung @ 10 t ha-1, 50% recommended dose of inorganic fertilizer + poultry manure @ 5 t ha-1. The experiment was laid out in a randomized complete block design with three replications. Crop characters, yield components and yield of Binadhan-14 were significantly influenced by spacing, integrated nutrient management and their interaction. The highest number of effective tillers hill-1(6.81), 1000-grain weight (22.67 g) and grain yield (4.78 t ha-1) were recorded at the spacing 20 cm × 15 cm while in case of integrated nutrient management, the highest number of grains panicle-1 (64.47) was found with 50% recommended dose of inorganic fertilizer + cowdung @5 t ha-1, on the other hand, 1000- grain weight (22.91g), and grain yield (5.02 t ha-1) were found with 50% recommended dose of inorganic fertilizer + poultry manure @ 5 t ha-1 while the lowest values from poultry manure @ 5 t ha-1. The highest grain (5.53 t ha-1) and straw (6.23 t ha-1) yields were found at the interaction of 20 cm × 15 cm spacing fertilized with 50% recommended dose of inorganic fertilizer + poultry manure @ 5 t ha-1. It can be concluded that short duration Binadhan-14 can be transplanted at the 20 cm × 15 cm spacing fertilized with 50% recommended dose of inorganic fertilizer + poultry manure @5 t ha-1 to obtain maximum grain yield.
Показать больше [+] Меньше [-]Phytoplankton and epipelic algal abundance in relation to bridge construction on Okpoka River in the Upper Bonny Estuary, Nigeria Полный текст
2018
Ihuoma Ejiowhor | Miebaka Moslen | Erema Ransome Daka
The objective of this study was to determine the impact of bridge construction on abundance and composition of phytoplankton and epipelic algae with respect to bridge construction on a section (ATC Okrika Axis) of Okpoka River, upper Bonny estuary in Nigeria. Phytoplankton and epipelic algae were collected in five replicates from six stations (UA – upstream, BA – bridge position, DA – downstream of bridge (reclaimed side) and (UC – upstream, BC – bridge position, DC downstream of bridge (vegetated side -mangrove) side of the river between January and March 2017. Thirty samples were collected per month with appropriate containers, preserved in 5% formalin-water mixture, taken to the laboratory and identified to the lowest possible taxonomic level. Ten species of phytoplankton (Gyrosigma spp., Synedra spp., Navicula spp., Nitzschia spp., Thalassiothrix spp., Coscinodiscus spp., Fragillaria spp., Pleurosigma spp., Cyclotella spp. and Rhizosolenia spp.) all belonging to the Baccillariophyceae (diatoms) were observed. Ten species (Gyrosigma spp., Navicula spp., Synedra spp., Nitzschia spp., Thalassiothrix spp., Coscinodiscus spp., Fragillaria spp., Pleurosigma spp., Cymbella spp. and Cocconeis spp.) of epipelic algae were also observed with the last two species in each group accounting for their differences. Cyclotella and Rhizosolema spp. were observed only on phytoplankton sampled and Cymbella and Cocconeis spp. were observed in epipelic algal samples suggesting minimal differences in composition. Analysis of variance indicated significant difference (P<0.05) in the abundance of both phytoplankton and epipelic algae between stations close to bridge construction compared to others sites farther away. The study therefore, concluded that activities of bridge construction across the Okpoka River impacted on the abundance and composition of phytoplankton and epipelic within the study area. Regular monitoring is recommended particularly after construction in order to detect recovery changes of these important aquatic algae that form the base of the food chain.
Показать больше [+] Меньше [-]Chronic exposure assessment of toxic elements from agricultural soils around the industrial areas of Tangail district, Bangladesh Полный текст
2018
Ram Proshad | Tapos Kormoker | Md. Saiful Islam | Md. Abu Hanif | Krishno Chandra
The present research was conducted to evaluate the potential ecological and human health risk of toxic elements (Cr, Ni, Cu, As, Cd and Pb) from agricultural soils around the industrial areas of Tangail district in Bangladesh. Potential ecological and human health risk were assessed through enrichment factor (EF), contamination factor (Cif), geoaccumulation index (Igeo), pollution load index (PLI), toxic unit analysis, exposure pathway, hazard quotient and hazard index. The mean concentration of Cr, Ni, Cu, As, Cd and Pb in the studied soils were 5.88, 13.92, 18.07, 5.90, 2.19 and 8.08 mg/kg, respectively. The mean values of enrichment factor, geoaccumulation index, contamination factor, pollution load index and toxic units were found low for all metals excluding Cd. Considering the severity of potential ecological risk factor for single metal (Eir), the descending order of pollutants was Cd > As > Cu > Ni > Pb > Cr. In the perspective of potential ecological risk (PER), soils from all sampling sites indicated moderate to very high PER. Chronic daily intake values were higher in children than the adult for both ingestion and dermal contact as body weight of children was lower than the adult. The non-cancer health risks related to individual element exposure through soil ingestion, dermal contact and inhalation was low for all investigated elements resulted in a HQ < 1, indicating low risk for both adults and children. Considering the total exposure of hazard index of ingestion, dermal contact and inhalation, there was no chance of having non-cancer risk for the inhabitants of the studied industrial area. Carcinogenic risks for both adult and children lying between an acceptable ranges.Bangladesh
Показать больше [+] Меньше [-]Impact of nutrient management on the yield performance of some aromatic fine rice (Oryza sativa L.) varieties in Boro season Полный текст
2018
Antora Adhikari | Md Abdur Rahman Sarkar | Swapan Kumar Paul | Kallyan Kanty Saha
An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, during November 2016 to April 2017 to study the impact of nutrient management on the performance of aromatic fine rice in Boro season. The experiment comprised three varieties viz., BRRI dhan50, Basmati and BRRI dhan63; and seven nutrient managements viz., poultry manure @ 5 t ha-1, recommended dose of chemical fertilizers (i.e. 250, 126, 120, 100 and 10 kg N-P-K-S-Zn, respectively ha-1), 25% less than recommended dose of chemical fertilizer + poultry manure @ 2.5 t ha-1, 50% less than recommended dose of chemical fertilizer + poultry manure @ 5 t ha-1, vermicompost @ 10 t ha-1, 25% less than recommended dose of chemical fertilizer + vermicompost 5 t ha-1, 50% less than recommended dose of chemical fertilizer + vermicompost @ 10 t ha-1. The experiment was laid out in a randomized complete block design with three replications. The results revealed that variety, nutrient management and their interaction exerted significant influence on yield components and yield of aromatic fine rice in Boro season. The highest grain yield (4.09 t ha-1), straw yield (6.20 t ha-1) and harvest index (39.37%) were obtained in BRRI dhan63 while the lowest grain yield (3.44 t ha-1) and harvest index (36.54%) were found in Basmati. In case of nutrient management, the highest grain yield (4.31 t ha-1) was recorded in recommended dose of chemical fertilizers (i.e. 250, 126, 120, 100 and 10 kg N-P-K-S-Zn, respectively ha-1) which was as good as 25% less than recommended dose of chemical fertilizer + vermicompost @ 5 t ha-1and 25% less than recommended dose of chemical fertilizer + poultry manure @ 2.5 t ha-1 while the lowest one (2.74 t ha-1) was found in vermicompost @ 10 t ha-1. In case of interaction, the highest grain yield (5.30 t ha-1) was obtained in BRRI dhan63 along with 50% less than recommended dose of chemical fertilizer + vermicompost @ 10 t ha-1 while the highest straw yield (7.20 t ha-1) was produced in BRRI dhan63 fertilized with recommended dose of chemical fertilizers (i.e. 250, 126, 120, 100 and 10 kg N-P-K-S-Zn, respectively ha-1). Therefore, it can be concluded that BRRI dhan63 can be grown with 50% less than recommended dose of chemical fertilizer + vermicompost @10 t ha-1 in Boro season to obtain the highest grain yield.
Показать больше [+] Меньше [-]Performance of chilli (Capsicum annuum L.) lines with different plantation time during rainy season Полный текст
2018
M. Ratna | R. Sarker | Rumman Ara | M.M. Hossain | M.M. Kamruzzaman
The experiment was conducted during April to September, 2016 at Spices Research Sub-Centre, Faridpur to evaluate the performances of four chilli lines with BARI Morich-2 as check and to select the suitable planting time during rainy season. The experimental field belongs to high land of Low Ganges River Floodplain (AEZ 12) with clay loam in texture. The experiment was laid out in RCB design with three replications. Four lines and a variety viz., C0711, C0712, C0713 and C0714 and BARI Morich-2 as check were evaluated with three planting time viz., 01April, 15 April and 30 April. Seedlings of 40 days old were transplanted maintaining of 50cm × 50cm spacing in each case. The crop (Green chilli) was started to harvest from July and completed on August-September, 2016.Among the lines, C0712 emerged as superior in terms of maximum number of fruits/plant (225.7) and weight of fruits/plant (478.6g) and fresh yield (15.43t/ha) while the highest single fruit weight (3.217 g) was found from C0714. The 15 April planting date emerged as best in terms of maximum weighed fruit (2.661g), weight of fruits/ plant (409.3 g), number of fruits/plant (182.5) and fresh yield (12.14 t/ha). The interaction effect showed that lineC0712 transplanted on 15 April gave the heavier fruits/plants (542.2 g) with maximum number of fruits/plant (241.3)and maximum fresh yield (16.73 t/ha). The 15 April planting was ideal for rainy season chilli evaluation and the line C0712 was the most stable performing line with respect to different planting dates.
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