The present study was carried out at the Animal farm station and Nutrition laboratory, Department of Animal Production, Faculty of Agricultural, Menoufia University in order to evaluate Azolla (Azolla pinnata) palatability by comparing with clover hay (first experiment) and investigate the effect of Azolla in different levels with corn silage on growth performance, digestibility, nutritive value, rumen parameters, blood biochemical and hematological criteria of Barki lambs (second experiment). The chopped fresh corn plants (without cobs) were prepared withdifferent replacement levels of Azolla pinnata 0, 5, 10 and 15% for 45 days as incubation period to be the four experimental diets.
Obtained results demonstrated that:

There were no significant differences (P=0.698) between Sun dried Azolla and Clover hay in dry matter content, while the content of OM, CP and EE were significantly higher in sun dried Azolla (84.16, 26.93 and 3.80%, respectively) than in Clover hay (81.75, 14.48 and 2.70%, respectively).
The content of CF % was significantly lower in sun dried Azolla (13.48) than in Clover hay (24.82).
The results of chemical analysis showed that sun dried Azolla is rich in CP content (26.93%), which exceeds the CP content of Clover hay by 86%.