Qualification of the use of plant yield-enhancing products with photosynthetic and growth parameters

In our experiment, we investigated the effect of some most commonly used plant conditioners and yield enhancers in production nursery-gardens reference plantations, which are based on photosynthetic growth parameters saplings productive stocks. The one-year old apple sapling was UEB 3177/1 variety, commertially called Sirius. addition to (such as shoot length stem diameter), total chlorophyll carotenoid contents, determine activity, were also examined both plantations. individual combined application yield-enhancing conditioning agents involved a six treatments. iron flavonoid containing preparation alone or combination resulted significant difference content compared control stock. case studied parameters, humic acid preparations sole use agent proved be effective longitudinal sapling. terms trunk size, same formulation best treatment Our results may have been influenced by weather conditions, they can considered preliminary results, studies should repeated next growing season draw valid conclusions.