Fruit growing
and viticulture of South Russia

Annotation

Under the conditions of the Southern Steppe of Ukraine the annual plant saplings do not always provide the necessary quality indicators. One of the main reason of crown lack of plants is a weak biological ability to branch forming on the most varieties. The research (2013-2015) were carried out in the second nursery field "EF "Melitopol" according to the standard techniques using in the gardening. It is tested in the experience the efficiency of influence on branch forming of plum saplings of various concentration of Arbolin (1,5-3,5% or 15-35 ml for 1 litre of water) taking into account the nipping height of apical leaves of the central shoot (50-60; 70-80 cm). The research objects are the plum saplings of Sentyabr'skaya and the Oda with low ability to forming of branches. Assessment of efficiency of crown forming of plants, depending on the chosen regulations, was determined using the standard techniques of research in the horticulture. The greatest efficiency of crown forming of plum saplings when using 3,0 %-3,5 % concentration of preparation is established. Optimal height of top leaves nipping is 50-60 cm for the strongly growing varieties with more acute angles of deviation and 70-80 cm for the weakly growing varieties with wide angles of deviation. The plum saplings processed by arbolin of different concentration were below control group on average for 11,5-17,9%, irrespective of height of their nipping. No trunk width change was observed in the test varieties. The growth intensity of saplings in the experience substantially depended on potential capacity of varieties. The determination was made about positive influence of the selected stimulation regiments of plants branching on biological productivity and force of growth and output of standard annual plum saplings.