Mohammad Reza Zarea Bavany; Gholamali Peyvast; Mahmoud Ghasemnezhad; Akbar Forghani
Abstract
Salinity is the main limiting environmental factor on plant growth and production. Therefore, finding salinity tolerant cultivars result to increase crop yield and production. However, a factorial experiment was carried out based on randomized complete block design with three replicates in hydroponic ...
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Salinity is the main limiting environmental factor on plant growth and production. Therefore, finding salinity tolerant cultivars result to increase crop yield and production. However, a factorial experiment was carried out based on randomized complete block design with three replicates in hydroponic culture. Two salinity levels (0 and 100mM NaCl) were considered the first factor and 26 greenhouse pepper cultivars was the second. Results showed a significant difference for all studied characteristics. Salt stress decreased all characteristics except to total dry matter percent and sodium concentration. The increase in sodium content accompanied with the decrease in potassium, calcium content and growth indices. Results showed a significant negative correlation between sodium with vegetative indices, potassium to sodium ratio, calcium to sodium ratio in all cultivars. Overall, ‘Paramo’, ‘Efests’ and ‘SPADI’ were known as the most tolerant pepper cultivars. According to finding of this study, the characteristics such as shoot sodium content and stress tolerance index can be used for screening salinity tolerance in pepper cultivars.
Mohammad Reza Asgharipour; Mosa Khatamipour
Abstract
Filed experiment was conducted to study the effect of manure and various combinations of foxtail millet and mungbean intercropping on the grain yield, weed performance,and the nutrients concentration in millet. The experimental design was a split plot with three replications. Main plots were differentmanure ...
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Filed experiment was conducted to study the effect of manure and various combinations of foxtail millet and mungbean intercropping on the grain yield, weed performance,and the nutrients concentration in millet. The experimental design was a split plot with three replications. Main plots were differentmanure rates (0, 15 and 30 t ha-1) and the subplots comprised five combinations of intercropping (sole millet and mungbean, combinations of 100% millet+15% millet, 100% millet+30% millet, 100% millet+45% millet).Manure, intercropping and interactions between them significantly influenced the grain yield of both crops. The highest grain yield in mungbean was observed in combination of 100%millet+30% mungbean along with application of 30 t manure ha-1. The combination of 100%millet+45%mungbean had the greatest absorption of radiation. Intercropping of millet and mungbean controlled weeds better than sole culture. Combinations of 100%millet+45%mungbean and 100%millet+15%mungbean along with application of 30 t manure ha-1 exhibited the greatest N and K in grains of millet, respectively.