Document Type : Original Article
Abstract
To study the effects of drought stress and nitrogen fertilizer levels on some seed quality indices of two red kidney bean genotypes, a field experiment was carried out as a split factorial arranged in a randomized complete blocks design with three replications. The main plots were three drought stress levels [irrigation after 60 (without stress), 90 (mild stress) and 120 (severe stress) mm evaporation from open pan class A] and factorial combinations of N fertilizer at four levels (0, 50, 100, and150 kg N ha-1) and two red bean genotypes (Akhtar and D81083) were assigned in sub-plots. The seeds were evaluated by standard germination test and electrical conductivity (EC) test after harvesting at full ripeness. These experiments were carried out as factorial based on a completely randomized design. Results showed that drought stress decreased normal seedling percentage, root length, shoot length, root weight, shoot weight, and seedling vigor index. Also, application of nitrogen fertilizer increased EC value, root length, shoot length and seedling length vigor index. Generally, germination indices of D81083 in non-stress conditions were better than Akhtar but, there was not significant difference between two genotypes in terms of severe drought stress level
Keywords
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