Multivariate analysis of variation of the effects of pollinators, floral manipulation treatments and years on pollinator visitation rate and duration.

d.f., degrees of freedom; MS, mean squares. *P<0.05, **P<0.01, ***P<0.001.d.f. 即自由度（degrees of freedom）；MS 即均方（mean squares）。其中*代表P<0.05，**代表P<0.01，***代表P<0.001。