The stimulation of scotch pine tree (Pinus sylvestris L.) graft and rootstock intergrowth

The effect of the some dry substances, their mixes and solutions introduction in the graft and stock junction on imp accretion of the pine trees growing freely and in dense areas is considered in the article. The substance introduction in the dry form appeared to be inefficient, except for the variant with sucrose for the trees growing inside the group. Wetting by water increased the safety of imps by 50 % in comparison with dry control. The influence of both sucrose, and ascorbic acid, depended on the tree location and physiological condition. The combination of water solutions of these substances when total indices of imp accretion and development improved by three times in comparison with dry control gave the greatest positive effect.