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Growth Performance of Clarias Gariepinus (Burchell, 1822) Fingerlings Fed Varying Levels of Soaked Plantain Peel Diets

Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License

Abstract. The growth response of Clarias gariepinus fed with vary level of soaked plantain peel meal (SPPM) was investigated for Eight weeks. The soaked plantain peel meal was used to replace maize as source of carbohydrate in diet of C.gariepinus of ten fish per cylindrical plastic tank of 50L in triplicates. Five isonitrogenous experimental diets were formulated and prepared in which maize was replaced with the SPPM at 0% (SPPM1), 25% (SPPM2), 50% (SPPM3), 75% (SPPM4) and 100 % (SPPM5). The fish were fed 5% body weight twice per day, monitored for weekly growth and mortality. Data collected were analysed using One-way ANOVA.The results showed that there was no significant different (p>0.05) in the mean length gain, specific growth rate, feed conversion ratio, protein conversion ratio and the final mean condition factor of fish fed SPPM diets but there was significant different (p>0.05) between fish fed control and 100% inclusion of SPPM. This study indicated that SPPM can replace maize up to 100% in the diets of C.gariepinus fingerlings for optimum growth performance and survival as shown in the survival rate.

Keywords: Claria gariepinus, Carbohydrate, Growth, Maize, SPPM

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DOI: http://dx.doi.org/10.12983/ijsras-2016-p0035-0038

 

Agro - Morphological Response of Three Vigna mungo Varieties (T9, RBU38 and VM4) to Soil Water Deficit

Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License

Abstract. Agriculture is the backbone of Indian economy and crop plants play important role in employment, GDP (gross domestic product) and in total export revenue. Many Vigna species thrive in tropical regions and are able to grow at high temperatures, low rainfall and poor soils that make them more economically valuable. There is a need to identify genotypes that withstand various environmental stresses better. In the present study, yield parameters and agro-morphological changes is studied in three varieties of Vigna mungo i.e. T 9, RBU 38 and VM 4 under short term drought stress. Morphological parameters (plant height (cm), branches/ plant and leaves/ plant) and yield attributing parameters (clusters/ plant, pods/ cluster, pods/ plant, pod length, seeds/ pod, seeds/plant, seed weight (g), mean productivity (MP), rate productivity (RP), drought susceptibility index (DSI), drought tolerance index (DTI), drought tolerance efficiency % (DTE %) and tolerance to drought stress (TDS) were modulated against short term drought stress. RBU 38 performed better among the plants studied. Decrease in yield under drought stress even at the early growth stage is observed providing additional inputs to the well known fact that such stress conditions are harmful at flowering and reproductive stage.

Keywords: Drought stress; drought susceptibility index; drought tolerance efficiency; drought tolerance index; Vigna mungo

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DOI: http://dx.doi.org/10.12983/ijsras-2016-p0036-0041

 

Growth Performance and Fruit Production of Sclerocarya birrea (A. Rich.) Hochst. Provenances in Malawi

Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License

Abstract. Domestication and commercialization of fruits from indigenous trees plays a major role in improving rural livelihoods through nutritional status, household income, entrepreneurial opportunities and economic empowerment. It also plays a role in promoting conservation of biodiversity and the sustainable use of natural resources. This study was conducted to assess twenty-two provenances of Sclerocarya birrea (A. Rich.) Hochst. planted in 1999 in Mangochi, Malawi. The trial was assessed for growth traits and fruiting at twelve years of age. The results showed that there were significant (P<0.001) variations among the provenances on diameter at breast height (dbh), tree height, number of branches and number of fruits. Marracuene provenance from Mozambique had the largest (14.2±0.8cm) dbh, the highest number of branches per tree (21±1) and number fruits per tree (795±104) than the other provenances. Kalanga provenance from Swaziland was more superior in tree height (6.10±0.93m) than the other provenances. There was a significant (P<0.05) correlation between number of fruits and dbh and between number of fruits and tree height. A moderate relationship (r=0.405) was observed between number of fruits and dbh, while a weak relationship (r=0.347) was detected between number of fruits and tree height. However, there was no significant (P>0.05) correlation between number of fruits and number of branches. This implies that growth parameters are weak predictors for fruiting hence cannot be used in indirect selection. Therefore, genetic factor is the major determining factor of fruiting. Future studies should concentrate on the reproductive biology of S. birrea to facilitate understanding of fruit productivity prior to promoting the species for Agroforestry programmes.

Keywords: correlation, domestication, fruit yield, growth traits, Sclerocarya birrea

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DOI: http://dx.doi.org/10.12983/ijsras-2016-p0042-0049

 

Review of Research on In Vitro Selection of Dendrobium Sonia-28, Against Fusarium Proliferatum

Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License

Abstract. In vitro techniques appear to be very suitable for conserving plant biodiversity as it is considered to produce a large number of clones in a relatively short time, which has provided an efficient way to rare or mass propagate commercially valuable plant germplasms especially for orchids. To overcome this impediment, one of the strategies being pursued is by the production of new plant mutants. In vitro mutagenesis by means of Fusarium proliferatum culture filtrate (CF) and fusaric acid (FA) can be used to produce economically improved mutants. The ability of Dendrobium sonia-28 to survive after infection opens new avenues for future development of fungus resistant transgenic plants.

Keywords: In vitro selection, Dendrobium Sonia-28, Fusarium Proliferatum

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DOI: http://dx.doi.org/10.12983/ijsras-2016-p0050-0061

 

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