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IJSTR >> Volume 5 - Issue 5, May 2016 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Potentiality Of Stressed Alfalfa Plants To Modify Soil Traits

[Full Text]



Bardees M. Mickky, Muhammad A. Abbas, Omar A. El-Shhaby



Alfalfa, Drought, Sand Proportion, Soil Properties



Leguminous plants play a key role in the sustainability of agricultural systems. Nevertheless, it is to somewhat scarce to find investigations about the interaction of such plants with the soil in which they grow under stress. A pot experiment was conducted to investigate the influence of graduated water regimes on the chemical features of different soil types, varying in sand proportion, before and after their cultivation with alfalfa (Medicago sativa) plants. The results indicated that soil cultivation with the studied plants, whether water-satisfied or not, generally increased the amount of soil ammonia, nitrate, peptide, total soluble and total nitrogen. On contrary, the amount of soil amino, amide, nitrite and protein nitrogen generally decreased after cultivation. Concerning soil ionic composition, the post-planting values of soil sodium, calcium, magnesium and sodium potassium ratio were significantly lower than their pre-cultivation synonyms. Furthermore, the percentages of decline caused by cultivating well-watered plants were higher than those caused by their moderately-droughted relatives which were in turn higher than those caused by severely-droughted ones. For soil chloride, potassium, sodium adsorption ratio and potassium adsorption ratio, culturing water-unstressed plants reduced these ionic fractions while droughted plants markedly favored such values. As a general feature, the maximum titers of all soil nitrogenous and ionic constituents were recorded for soil with the least sand proportion. The other chemical soil characteristics (pH, electric conductivity, organic carbon, organic matter, calcium carbonate, bicarbonates, sulphates and total soluble salts) were all fluctuated in a random fashion among the various soil types before and after planting water-stressed or control alfalfa plants. Thus, the results obtained herein recommend alfalfa as a pioneer plant that can be introduced to infertile and/ or dry lands with a paramount efficacy to enhance soil chemical properties.



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