Based on the unified analyses of KASCADE , AKENO , EAS-TOP and ANI EAS size spectra , the approximations of energy spectra of different primary nuclei have been found .
The calculations were carried out using the SIBYLL and QGSJET interaction models in 0.1-100 PeV primary energy range .
The results point to existence of both rigidity-dependent steepening energy spectra at R \simeq 200 - 400 TV and an additional proton ( neutron ) component with differential energy spectrum ( 6.1 \pm 0.7 ) \cdot 10 ^ { -11 } ( E / E _ { k } ) ^ { -1.5 } ( m ^ { 2 } \cdot s \cdot sr \cdot TeV ) ^ { -1 } before the knee E _ { k } = 2030 \pm 130 TeV and with power index \gamma _ { 2 } = -3.1 \pm 0.05 after the knee .