Abstract
Salinity is one of the major environmental problem that lead to deterioration of agricultural land and, as a result, to reduction in crop productivity. This research tested to evaluate and identify salinity stress tolerant Teff varieties/lines and to determine the effect of salinity at different levels of NaCl. The screening procedures were conducted at three growth stages; germination, seedling and field experiment. Experimental treatment included 3 levels of NaCl (0, 10 and 15 dS m-1) at germination and seedling stages. Results indicated that, all investigated traits were affected by salt stress at germination and seedling stages. Similarly, salinity reduces yield and yield components of Teff varieties at actual field experiment. Thus, based on the analysis results at different screening stages, Kora and DZ-01-974 had average maximum values of yield and yield attributes in all investigated parameters and hence, selected as promising varieties to tolerate saline environments. Accordingly, Kora and DZ-01-974 were recommended for yield and yield attributes maximization. Therefore, these varieties should be validated and demonstrated to more numbers of farmers in larger plots so as to recommend to extension and end users in the district. Keywords : Teff, Salinity, NaCl, Growth parameters, Yield attributes DOI : 10.7176/JNSR/9-3-07
Highlights
Soil salinity is an increasing problem in the world and main obstacle to agricultural productivity especially in areas where irrigation is necessary (Flower, 2004)
Germination stage screening results Total germination percentage: total germination percentage (TGP) of Teff varieties were significantly reduced by the application of levels of saline solution
The analysis result showed that, all Teff varieties were decreased in TGP with increasing salt stresses levels
Summary
Soil salinity is an increasing problem in the world and main obstacle to agricultural productivity especially in areas where irrigation is necessary (Flower, 2004). Yield, and quality reduction may occur through a decrease in the ability of plants to take up water from the soil solution and the destruction of soil structure due to the presence of Na+ (Krishnamurthy et al, 2007). Some elements, such as Na and Cl have specific toxic effects on plants. Salinity causes ion toxicity, osmotic stress, mineral deficiencies which adversely affect photosynthetic, physiological and biochemical processes limiting crop yield and production to various levels (Krishnamurthy et al, 2007; Hamid et al, 2008). Salinity effects are the results of complex interactions among morphological, physiological, and biochemical processes including seed germination, plant growth, and water and nutrient uptake (Singh et al, 2013)
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