Abstract:

Abstract: Effect of Plant Growth Regulators PP333, 6-BA, PP333+6-BA on growth and cold-resistant of Pyrus Nanguo was studied with 2-year Pyrus Nanguo seedlings through Pot experiment. The results showed that: seedlings height is moderate, stem diameter is enlarge, relative conductivity and MDA content is the lowest, both branches soluble sugar content and proline are the highest in spraying the concentration of 450 mg.L-1 complex dispensing PP333 +6- BA (mixed 1:1 by volume) and seedling the cold tolerance is the strongest.