الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Rice (Oryza sativa L.) is one of the most important cereal crops worldwide, belongs to Poaceae family.The present investigation was carried out under greenhouse conditions at Agricultural Botany Dept., Faculty of Agriculture, Kafrelsheikh University during the two summer seasons 2017 and 2018. To study the effect of Actosol, Actosol+ Nano-zinc and Actosol+ Nano-silica on morpho-physiological, biochemical and yield characteristics for two Egyptian varieties were grown under salinity conditions. Giza 177 variety as salt susceptible while Giza179 as salt tolerant and obtained from Rice Research and Training Center, Field Crops Research Institute, Agricultural Research Center, and sown in May20th in both seasons. As well as the salinity levels were potted in sub-sub plots as following, Tap water, 2000 ppm Nacl, 4000 ppm Nacl and 6000 ppm Nacl. Other agricultural practices were done according to the recommended practices for each rice varieties.
Salinity levels, 2000 ppm, 4000 ppm and 6000 ppm had significantly decreased vegetative, yield and physiological characteristics and biochemical components, while increased number unfilled grains , proline and sodium concentration. The application of Actosol, Actosol+ Nano-znic and Actosol+ Nano-silica improved vegetative, yield and physiological characteristics and biochemical components, while decreased number unfilled grains, proline and sodium concentration in the two seasons.
Applied Actosol and Nano-particles could mitigate the effects of salinity stress on plant growth and biochemical constituents and enhanced yield characteristics in rice plant.