Table 1: Means and Standard Deviations of Carbon and Nitrogen contents (d.w.%) and C/N ratio in Azolla strains from Dec. 2000 to May 2001. We observed high quantities of Nitrogen in the leaves of the Japan and Italy strains; it was probably related to the decrease of its biomass during our test. The Milan strain showed lower Nitrogen content, but a good C/N ratio associated with a high RGR (see Figure 1).

Strains%C%NC/N

Milanmean38.8542.58115.582
std1.660.482.58
Swedenmean37.7222.09718.166
std2.040.181.73
Germanymean38.2442.24817.165
std1.870.181.60
Italymean40.3742.63115.606
std0.980.332.08
Japanmean41.2943.02514.336
std1.260.593.66