ARPN Journal of Agricultural and Biological Science       ISSN 1990-6145
   
Custom Search
 
 
 

 
ARPN Journal of Agricultural and Biological Science                         November 2016 | Vol. 11  No. 11
 
Title: Effects of exposure to magnetic field on water properties and hatchability of artemia salina
Author (s): S. M. Hassan and Ridzwan Abdul Rahman
Abstract:

The application of magnetised water in aquaculture is still in its infancy. This study is a step towards gaining a better understanding of the effect of magnetism on water properties and on the biology of culture organisms, such as the brine shrimp, A. salina. The present study evaluates the effects of magnetic field exposure on water properties which in turn affect the hatchability of A. salina. Water was passed through three magnetic devices of different intensities, i.e. 0.1, 0.15 and 0.2 Tesla, respectively, once at every 5 hour interval. The dissolved oxygen (mg/L) was found to increase (from 3.84 mg/L to 4.51 mg/L). pH also increased from 7.11 to 7.42 which is favourable for A. salina. The ammonium (NH4-N mg/L) and ammonia (NH3-N mg/L) levels decreased from 0.43 mg/L to 0.28 mg/L and from 0.36 mg/L to 0.19 mg/L respectively. Salinity (ppt), specific conductance (ÁS/cm) and total dissolved solids (mg/L) were also found to have increased significantly (P ≤ 0.05) after magnetization. Overall, the exposure of water to a magnetic field was found to have increased the hatchability rate of A. salina significantly (P ≤ 0.05). A much better increase of 39.61% (41.67 to 69.00) in A. salina hatchability rate (H%) was attained in water exposed to a magnetic field of 0.15 Tesla for four times. This has positive implications for aquaculture because a higher rate of A. salina hatchability means that the brine shrimp can be produced more economically and a good sign for application of magnetic water for other aquaculture procedures such as induced spawning, fertilization, larval rearing and fish grow-out in recirculating aquaculture system.

 
       
 
Full Text  

Title: An economic analysis of off-season capsicum/bell pepper production in Punjab, Pakistan
Author (s): Qamar Ali, Muhammad Ashfaq and Muhammad Tariq Iqbal Khan
Abstract:

Off-season vegetable production can achieve recommended vegetable consumption with high profit. This study calculated the per acre costs, returns and determinants of revenue in off-season capsicum/bell pepper production. Primary data from 70 farmers were collected with stratified random sampling. Production cost was more for medium farmers (Rs. 647,858.04) followed by small (Rs. 646,990.34) and large (Rs. 621,692.93) farmers. Medium farmers had more production (56976.53 kg) while small farmers earned more revenue (Rs. 1,392,869.57) and price (Rs. 25.88 kg-1). BCR shows that a small farmer earns Rs. 2.16 by investing rupee one than medium (Rs. 2.13) and large (Rs. 2.00) farmers. Age, education, experience, polythene sheet cost and pesticide cost had a positive and significant impact on revenue. R2 (0.852) and f-value (38.271) showed goodness of the model. High investment, price fluctuation, disease attack and lack of extension services were main problems. Government should take steps to eliminate these problems.

 
 
 
Full Text

Title: Determining the presence of the fig mosaic virus (FMV) in three varieties of Ficus carica L. in Costa Rica
Author (s): Luis Alvarado-Marchena Randall Chacsn-Cerdas, Alexander Schmidt-Duran, Carlos Alvarado-Ulloa and Dora Flores-Mora
Abstract:

Fig is a fruit tree with medicinal and nutritional properties. In Costa Rica, the production of this crop has been promoted in order to stimulate the agricultural diversification. However, conscious of the international problematic caused by the presence of the fig mosaic virus (FMV) assays have been performed to the variety Brown Turkey, present in Costa Rica, which presented negative results for pathogenicity. Consequently, it was considered necessary to establish standardized protocols which allow the microscopic and molecular diagnostics of other figs varieties in the country. In this context, the present research evaluates the efficiency of using diagnostic tools including diagnosis through symptoms, Transmission Electron Microscopy and using molecular assays through PCR with previous retro transcription (RT-PCR) which detected a 302 bp fragment of the FMV RNA in two varieties of fig, corresponding to "Brogiotto Bianco" and "Negro San Juan", using the cultivar Brown Turkey as a negative control for the pathogeni city. Through these assays it was possible to determine the differences from a cytological and molecular level in the varieties when compared to the control; evidencing the characteristic symptoms of the studied virus and the amplification of the viral fragment, and hence, indicating that these positive material require a viral removal process before being introduced in the country.

 
 
 
Full Text

Title: Trace elements in bitter melon (Momordica charantia L.) and their distribution in different plant parts
Author (s): Y. Savsatli, A. Ozcan, M. I. Catal, F. Seyis, M. Akbulut and E. Akyuz Turumtay
Abstract:

This study was conducted to determine some trace metals quantities in the different plant parts of bitter melon (Momordica charantia L.) grown in Pazar district of Rize Province in the Black Sea Region of Turkey. The experiment was established in the trial field belonging to the Faculty of Agriculture and Natural Science in Recep Tayyip Erdogan University. The plants were uprooted on 9th of August in 2015, separated in their stem, root, branch, unripe fruit flesh, ripe fruit flesh, leaf and seed parts, and analyzed by ICP-OES to determine the level of Cd, Pb, Ni, Fe, Zn, Cu, Al, Cr and Mn. Concentrations of Al, Fe, Mn and Zn were found higher than other elements in all of the plant parts. The roots had the highest concentration values of all trace elements examined except Zn and Mn compaired to the other parts of the plant. Mn was found highest in leaves and branches. In consideration of 100 g fresh weight for each part of plant, the highest total trace element amount was determined in roots of bitter melon followed by seeds, leaves, branches, stems, unripe fruits (flesh) and ripe fruits (flesh) respectively. The levels of trace elements investigated in all parts of the bitter melon were below the maximum permissible limits except roots contained the high levels of Fe and Al concentration.

 
 
 
Full Text  

Title: Study effect of replacement walnut with peanuton processed olive quality
Author (s): Maryam Rajabian and Ali Mohamadi Sani
Abstract:

Since the use of walnut in the formulation of industrial processed Olive cause some quality issues with the product, the aim of this study was to evaluate the effect of replacing peanut on qualitative characteristics of the product. For this purpose, peanut ratios (10%, 20%, and 30%) instead of walnuts were used and its impact on the physicochemical properties of samples (smell, taste, consistency, oiling off and peroxide value) during three months was assessed. In the next step, the effect of different percentages of pomegranate paste on sensory evaluation of the product was done. The measurements were done in triplicate. Data were analysed using SPSS statistical software. The results showed that sample containing 30% of walnuts was the best in term of sensory properties. with increasing peroxide value and leaving oil during the time, sensory properties of the product contains 30% of walnuts changed and it was significantly different from the product contains 30% of peanuts.

 
 
 
Full Text  

 

 

     

  

   

  

  

  

 

 

 

 

 

 

 

 

 

 

 

 

 

       arpnjournals.com                                                       Publishing Policy                                                  Review Process                                           Code of Ethics