Influence of plant growth regulators on Scots pine (Pinus sylvestris L.) seedling growing in the conditions of closed soil

Abstract

The results of researches of ecological value of plant growth regulators on growth of Scots pine seedlings in the conditions of the closed ground — greenhouses of Sobolivsky forestry of Subsidiary enterprise «Romanovsky forestry of agro-industrial complex» of Zhytomyr regional municipal agroforestry enterprise «Zhytomyroblagrolis» of Zhytomyr regional council are given. Potassium humate, Epin (manufactured by Agriflex), Alga-600 were used in the experiments. Agrochemical analysis of soil in the greenhouses of the experimental farm was carried out. The study of the impact of growth regulators on the ecological condition of plants, their seedlings took place during the growing season of 2021. The influence of plant growth regulators on Scots pine seeds in the preparation of seed material for sowing was studied, the greatest efficiency of pre-sowing soaking of Scots pine seeds in aqueous solutions of growth regulators in the experiment with potassium humates and Epine was defined. It was found that the treatment of seedlings in greenhouses the greatest stimulating effect is achieved when using solutions of Epine and potassium humates at a concentration of 5 mg/l solution, the ecological impact on biometric indicators was assessed: height, root neck diameter of seedlings. It was found that in the needles of Scots pine treated with humate potassium content of a, β-chlorophyll is 70.4 mg / 100 g of raw weight, however, in the needles of Scots pine treated with growth regulator Alga — 600 this figure reaches 49.0 mg / 100 g of raw weight and approaching the indicators of the control area. According to the accumulation of a, β-chlorophyll, it can be predicted that seedlings treated with potassium humates and epinephrine will be more productive than others and will not cause environmental damage. It is recommended for agro-forestry enterprises, in particular, Zhytomyr Polissya, namely for the Subsidiary enterprise «Romanivsky forestry of agro-industrial complex» of Zhytomyr regional municipal agro-forestry enterprise «Zhytomyroblagrolis» of Zhytomyr regional council in closed soil conditions to obtain high-quality compliance with modern requirements for the balanced development of agricultural production as a component of environmental security of Ukraine.