دراسة أثر الإجهاد الجفافي في بعض المؤشرات المورفولوجية والنمو لبعض الأنواع الرعوية العشبية المعمرة والحولية

الملخص EN

The laboratory study have been implemented at the plant seedlings in the wood lab in the Renewable Natural Resources and Environment section of the Agriculture college in Damascus University to evaluate the response of six species from rangeland related to Poaceae to different levels of drought It being noted that exposure of the studied species to the drought stress during the plant sign stress.

level, caused a significant reduction, in most of the indicators which were studied, and the drop rate The has increased on average of long each roots and seedlings with increased stress of drought.

Hordeum murinum then the Avena fatua comes after it, were most standing of drought stress which reaching the longest roots (10.3, 8.6 cm) respectively and the highest rise of seedlings (11.5, 6.5 cm) respectively and the least length of roots (3.2, 5.4 cm) respectively and the lowest rise of seedlings (4.6, 4.2 cm) respectively.

While the Festuca elatior and the Phalaris minor were least standing and the most sensitive of dought which reaching the longest roots (5.6, 5.4 cm) respectively and the highest rise of seedlings (6.9, 7.3 cm) respectively and the least length of roots To remain the (1.5, 1 cm) respectively and the lowest rise of seedlings (2.2, 2.8 cm) respectively.

Sorghum halepense and the Oryzopsis miliacea were in the broad among of standing which reaching the longest its roots (7.2, 7 cm) respectively and the highest rise of seedlings (11.5, 7.7 cm) respectively and the least length of its roots (5,3 cm) respectively and the lowest rise of seedlings ( It does this by values that have been recorded during the laboratory 5.6, 4.1 cm) respectively.

.experiment to the root lengths seedlings highest