نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار، گروه علوم و مهندسی آب، مرکز آموزش عالی کاشمر
2 استادیار، گروه علوم و مهندسی آب، مجتمع آموزش عالی بم
3 گروه اگروتکنولوژی، دانشکده کشاورزی، دانشگاه فردوسی مشهد
4 استادیار و عضو هیئت علمی گروه مهندسی آب، دانشکده کشاورزی، دانشگاه جیرفت
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
The current research has been conducted for the purpose of evaluating the effect of drought on the yield and its components as well as the investigation of the relationship between the physiological traits with the Yield of seed under drought stress conditions. The treatments included drought stress in four levels (40%, 60%, 80% and 100% of the water need) within the format of a complete randomized block with three replications. The results of the variance analysis indicated that drought stress influences the leaf weight, stem weight, number of grains, weight of the grain, pod weight, root weight, root volume, root length, root surface, longitudinal density of the root The highest and the lowest Amongst the Yield components, grain weight and the number of pod were found respectively reduced by 36% and 58% under drought stress conditions in contrast to relatively severe stresses. Under the absence of drought stress (100% and 80% of the water need), the number of grains were found negatively correlated with such traits as root weight and longitudinal density of the root (respectively -0.366 and -0.018) and positively correlated with root surface and root volume (respectively 0.619 and 0.527). On the other hand, the grain weight was positively associated with the traits related to root under drought stress conditions (60% and 40% of the water need); the highest effects were evidenced for the root volume (0.739) and root length (0.657).
کلیدواژه‌ها [English]
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