Rice (Oryza sativa L.) is among the most important food crops that provide staple food for nearly half of the world’s population. Rice production is affected by different types of stresses, includes biotic and abiotic. Biotic stresses have insect pests, fungus, bacteria, viruses, and herbicide toxicity, while abiotic stresses are drought, cold, and salinity are also well studied in rice. High-quality seed is an essential factor during crop production, which is necessary for sustainable food security and poverty reduction. Rice varieties are genetically different in terms of Various genes, cloned, and characterized as can contribute to resistance to both types of stresses and protect rice crops. This study evaluates three different rice varieties (Basmati 370, IB26 known as Buryohe, and IR64 known as Mfashingabo) on both biotic and abiotic stresses of open field conditions. So that it will provide the necessary information related to rice varieties adaptability for both stresses (biotic and abiotic factors) to farmers; however, the production can be increased by reducing environmental pollution risk due to the use of chemical pesticide and fertilizers the farmers. The study was carried out at Bugarama marshland precisely in zone I located in Rusizi District, Western Province of Rwanda. Complete Randomized Block Design (CRBD) has been used, and the main parameters to be observed were seed germination, plant height, plant tiller, Number of panicles, plant vigor, the weight of 1000 seeds, and the yield (t/ha). The results are significant differences for all varieties on adaptability to biotic and abiotic factors.IR64 type has higher adaptability for all studied parameters ended by high yield production of 5.477t/ha. This variety can be used by the farmer for increasing productivity and also suggesting other researchers forward on evaluating the impact of fertilizers on those varieties and apply this research in different marshland.

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J. D. Rukundo, “Evaluation of three rice (Oryza Sativa) varieties adaptability to biotic and abiotic stress climatic conditions of Bugarama rice scheme,” International Journal of Applied and Physical Sciences, vol. 6, pp. 1-8, 2020. doi: https://dx.doi.org/10.20469/ijaps.6.50001