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Articles by R. Issolah
Total Records ( 2 ) for R. Issolah
  R. Issolah , A. Tahar , F. Alane , S. Sadi , M. Adjabi , Y. Chellig-Siziani , S. Yahiatene and M. Lebied
  As part of the evaluation and the development of plant genetic resources of fodder and pastoral interest in Algeria, ten populations of sulla (Sulla coronaria (L.) Medik. Syn. Hedysarum coronarium L.) were subject to an assessment. The growth and the chemical composition of the populations were analyzed in this framework. The field trial is a randomized complete block design with four replications. Several parameters (seeds thousand weight, emergence of seedlings, number of plants per square meter, maximum height, maximum width, bloom, cutting date, green matter, dry matter, mineral matter, organic matter, crude fiber, fat, phosphorus, calcium, total nitrogen, Acid Detergent Fiber (ADF), Neutral Detergent Fiber (NDF), lignin, hemicellulose) have been determined. Two ecological factors (altitude, rainfall) were also taken into account. The variance analysis indicated a significant variation between the populations regarding eight variables linked to the growth and the chemical composition of the plant. Many significant relationships were also highlighted. The results of the correlation matrix indicated also that the total nitrogen content is negatively correlated with the number of plants per square meter and the final height. Overall, the results of principal component analysis showed a good distribution of variables, particularly, the final width, the hemicellulose and the NDF. The descriptive analysis signalized also the part of the altitude and the rainfall characterizing the natural habitats of the populations. This study permitted a better understanding of the nature of variation established within this species. Sulla can play a significant role in the socio-economic and environmental development of rural communities.
  R. Issolah , A. Tahar , S. Sadi , M. Adjabi , F. Alane , Y. Chellig-Siziani and M. Lebied
  Background and Objective: As part of the valorization of plant genetic resources of fodder and pastoral interest in Algeria, ten populations of subterraneun clover (Trifolium subterraneum L.) were subject to an evaluation. The objective of this study is the characterization of the Algerian populations of subterraneun clover on quantitative and qualitative level. This would permit to increase the number of fodder species used in the different areas of the country for developing the livestock. Materials and Methods: The field trial was a randomized complete block design with four replications. Then, the chemical composition of the populations was analysed at the laboratory. In this framework, several parameters were determined (Thousand seeds weight, seedlings, height, width, flowering, cutting date, green matter, mineral matter, organic matter, crude fiber, fat, phosphorus, calcium, total nitrogen, acid detergent fiber, neutral detergent fiber, lignin and hemicellulose). Two ecological factors (Altitude and rainfall) characterizing the natural habitat of the populations were considered. The data obtained have undergone statistical treatments (ANOVA/Tukey method). Then, the correlations and the principal component analysis were used for a better interpretation of the relations established between the different populations and the variables. Results: The variance analysis indicated that there is some variation in three variables linked to the cutting date, the thousand seed weight and the yield of green matter. It seems that there is no link between the variables and the ecological factors. The principal component analysis indicated that the calcium and the vegetative development in width are the variables, the best represented. Conclusion: Overall, the variables related to the chemical composition contribute more than those related to the vegetative development (number of variables), but the probabilities corresponding to the vegetative development are the most significant. This study would contribute to select the best populations of subterraneun clover in order to introduce them in the different agro-edapho-climatic areas, specially in the Mountains of the North East of Algeria, which is the most watered zone in the country.
 
 
 
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