| 【Objective】The study was carried out to explore the effects of different molybdenum（Mo）
concentrations on the growth and fluorescence parameters of Lycium ruthenicum seedlings, and to preliminarily determine the optimal Mo concentration to promote the growth of L. ruthenicum seedlings, which provided a certain basic theoretical
reference for the development of small berry industry.【Method】Taking L. ruthenicum seedlings as the research object,
hydroponic planting experiments were conducted to explore the changes in root length, plant height, biomass, trace elements
content and fluorescence parameters of L. ruthenicum seedlings under different Mo concentrations.【Result】（1）With
the increase of Mo concentration, the biomass, root length and plant height of all the parts of L. ruthenicum seedlings showed
a trend of first increasing and then decreasing. The Mo concentrations of 5, 10 and 20 μmol/L could significantly promote the
various growth indicators of L. ruthenicum seedlings, and the Mo concentration of 10 μmol/L had the best comprehensive
promotion effect; when the Mo concentration was 40 μmol/L, it had an inhibitory effect;（2）Mo application had a significant
effect on the absorption of trace elements Mo, Zn and Fe, and the absorption and utilization of Mo element was synergistic, that
of Zn was antagonistic, and that of Fe was antagonistic and synergistic. When Mo concentration was 10 μmol/L, absorption
and utilization efficiency of each part in ruthenicum seedlings was relatively stable to trace elements Mo, Zn and Fe;（3）
With the increase of Mo concentration, the initial fluorescence（Fo）of L. ruthenicum showed a trend of first decreasing and
then increasing, and there was a minimum value when the Mo concentration is 10 μmol/L. The trend of maximum fluorescence
yield（Fm）, maximum photochemical efficiency（Fv/Fm）and actual photochemical efficiency（ΦPSⅡ ）was opposite
to that of Fo, and there was a maximum when the Mo concentration was 5 μmol/L or 10 μmol/L.【Conclusion】There is an
obvious correlation between the growth of L. ruthenicum seedlings and the concentration of Mo applied. Mo application at an
appropriate concentration can significantly increase the growth of L. ruthenicum seedlings, and it will inhibit its growth when
the concentration is too high. Experiments have found that the suitable Mo concentration range for the growth of L. ruthenicum
seedlings is 5 -20 μmol/L, with 10 μmol/L being the best. |
