Infradian rhythms of daily shoot increment in Salix viminalis (salicaceae) clones

The structure of seasonal dynamics daily growth shoots basket willow (Salix viminalis) is described and analyzed. Object: model inbred-clone population S. viminalis. Material: developing on annual saplings from cuttings. Methods: comparative morphological, chronobiological, numerical analysis time series. formation dimorphic root systems one-year cuttings described. It established that the increment determined by interaction linear nonlinear components. Linear components are approximated regression equations, harmonic oscillation equations. rhythmicity shoot Four groups biorhythms were identified: with a period about 96 days, subannual 4064 infradian 1924 days 1016 days. alternation peaks dips in 19...24 Infradian different periods synchronized each other. probable reason existence pulse synchronizer biorhythms. Interclonal differences not revealed. cause intraclonal ontogenetic heterogeneity vegetative buds, which have developed. To verify this hypothesis, we plan to observe development seedlings grown harvested parts uterine shoots. results obtained recommended be taken into account when planning agroforestry measures for crop