Sporirea legării fructelor la pomii de păr de soiul Noiabskaia prin intermediul regulatorilor de creştere

Abstract

The study subject of the experience was Noiabrskaia pear variety, grafted on BA 29. The trees were trained as spindle system. The distance of plantation is 4.0 x 2.0 m. The experimental plot it was placed in the orchard „Terra Vitis” Ltd. founded in 2010 year. The research was conducted during the period of 2017 year. To study setting processes of reproductive organs, fruit production and its quality were experimented the following variants of treatment: 1. Control – without treatment; 2. GA3 – 20 ppm (18.04.2017); 3. GA4+7 – 40 ppm (18.04.2017); 4. GA4+7 – 40 ppm (26.04.2017); 5. Prohexadion de Ca – 10 ppm + GA4+7 – 40 ppm (26.04.2017). During the research, it was studied degree of fruit setting, the amount of seeds in the fruit, average of fruits, plantation production and their quality. It was established that the growth regulator GA3 in dose of 20 ppm can be included in the technology system when 30-40% of the flowers are open to increase the resistance of the reproductive organs at low temperatures, improving the physiological processes in the plant, increasing the degree of fruit setting, the amount of fruit in the pear tree crown and plantation production.