It has been investigated that the growth stimulators increased the diameter of the stem of pepper plants by 8-9%, and under the the effect of Vitasyme the diameter of root collar increased by 14%.
The drugs caused a significant increase in the number of leaves per plant and the weight of the damp substances of the leaves. At the same time leaf area increased under their influence. Moreover, a significant increase of this indicator occurred after the adoption of an integrated drug Vitasyme.
The leaf area index is a significant cenotic parameter of plantation crops. Under the treatment of plants with the Vitasyme this figure increased by one third, and in the application of a synthetic analogue of cytokin it increased by 16%.
Specific surface density is a quantitative characteristic of the concentration of the structural elements involved in photosynthetic processes. It is established that under the influence of Vitasyme this figure tended to increase, but under the action of 6-benzylaminopurine it increased significantly, which may be due to changes in mesostructural leaf organization.
An important indicator which affects the plant yield is the amount of chlorophyll in leaves. It is shown that the drug Vitasyme significantly increased the amount of chlorophylls (a+b) in leaves of sweet pepper, but under the action of 6-benzylaminopurine the amount of the main photosynthetic pigment tended to increase.
It has also been proved that under the influence of growth stimulators the amount of chlorophyll per unit area of planting significantly increased. A synthetic analogue of cytokinin was more effective in this case.
From the point of view of the efficiency of the biological productivity of plants it is important to study the dynamics of accumulation of dry matter and net productivity of photosynthesis. It is established that growth factors, Vitasyme and 6-benzylaminopurine, increased the dry mass of plants by more than 20% and the net productivity of photosynthesis, respectively, by 22% and 10%.
Anatomical and morphological changes in plants of sweet pepper, which occurred under the influence of the growth stimulators, had a positive impact on quantitative indicators of productivity elements. The use of a complex growth stimulant Vitasyme is found to be more effective from the point of view of optimizing the production process. The drug increased the number of fruits per plant by 32% and the average fetal weight. The fruit yield from 1 hectare increased by 34%. Under the action of 6-benzylaminopurine the number of fruits per plant increased by 12%, the average weight of fetus by 5%, and the fruit yield from 1 hectare increased by 16%.
Key words: sweet pepper, Vitasyme, 6-benzylaminopurine, morphometry, leaf area, chlorophyll, crop yield.