Influence of salinity and source of water on growth and protein content of Azolla pinnata and Azolla filiculoides under Egyptian conditions.
A. pinnata and A. filiculoides were subjected to 500-2000 ppm salt treatment and supplied with irrigation and/or drainage water in a field experiment conducted in Egypt. The growth and protein yield of both ferns decreased with increasing salinity. The protein yield of both species reached its highest on the twentieth day of incubation following 500-1000 ppm NaCl treatment. Dry matter of A. pinnata and A. filiculoides was highest on the fifteenth days of growth regardless of the water used for irrigation. The doubling time of both ferns increased with time, but was shorter when irrigated with water.