Water regime of different Weigelaxwagneri cultivars was studied by such physiological parameters as water stress, dry matter content and concentration of cell sap in the leaves. There were established some differences in these parameters between the studied cultivars. A general pattern for the culture is noted; thus, with the increase of stress factors (air temperature, decrease of soil moisture ), water scarcity and cell sap concentration started to increase, at the same time there was a decrease of synthesis of plastic substances.

The adaptive stability of the types of the apple tree of different ploidy and different ecological- geographical origin to the complex of the abiotic stress factors of the summer period of the south of Russia was studied. It is revealed by physiological biochemical methods, that for the duration of the summer period of 2011-2013 yr. water content in the leaves in the studied types was reduced. Triploids Union, Rodnichek, diploid Fortune and type Deuton of American selection were characterized by larger water content in the leaves. It is established that the portion of the preferred influence of separate osmoprotektors on the stability of the cells of leaves to the dehydration depends on weather conditions. The types of the apple tree of domestic selection in contrast to the introduced types possess the combined stability to the stress factors of summer period (to drought and to heat). The introduced types of the apple tree Aydared, Erli Mak, Deuton (selections of the USA) and Ligol (Polish selection) are sufficiently resistant to the drought, which makes it possible to use them in the selective process as the sources of the sign of drought resistance. During the period of 2011-2013 yr. the introduced types of the apple tree оf Aydared, Deuton (selections of the USA) and Ligol (Polish selection) and also type of domestic selection Union and Rodnichek proved to be more harvest.

In the conditions of damp subtropics of Russia within 2008-2013 the adaptive potential of pear varieties for different periods of the maturing expressed by stable fructification and high productivity was studied. The estimation of ecological parameters adaptive properties of pear on productivity in contrast conditions of cultivation was given. The index of conditions of formation of crop for each varieties was defined. The high-quality differences were established. The varieties, capable to provide high and stable productivity in various conditions of environment, were revealed. The necessity for intensive varieties was shown. It is recommended to use varieties with the lowered responsiveness on conditions of environment on an extensive background where they will give a return maximum at a minimum of expenses.

The characteristic of 41 varieties of apple-tree from Sverdlovsk Research Station of Fruit Growing in mountainous Dagestan are given. The estimation of varieties by their stability, quality of fruits for further growth in the highlands of Dagestan is conducted. The results of research revealed possibility of northwarding of apple-tree in harsh climate of high-mountainous Dagestan due to its introduction from the northern regions of the Russian Federation. Many cultivated apple-tree varieties were hastive. By the best characteristics of growth and yield perspective for the High-mountainous Dagestan varieties are: summer - Iset white, Dream and Papiroyantarnoe; autumn - Jantar; autumn and winter - Fermer, Marina, Persianka; winter - Kerr and Nastenka; Decorative - Malinovka, Sibirka parsheustoychivaya and Gazonaya zontichnoya.

Contents of pink flowering strawberry collection in NCRRIHV includes the 7 introduced varieties and 18 hybrid forms derived from crosses by Belrubi × F₁ C-141. Hybrid forms are well adapted to the conditions of the North Caucasus region, have, in high productivity, decorative traits and the ability to continuous flowering and fruiting during the spring-summer and autumn seasons. Number of flowers (pieces/plant) in the hybrids ranged from 9 to 293. Greatest number of flowers per plant seen in hybrid forms 9-2-12 (243 pcs), 5-212 (293 pcs), 2-7-12 (216 pcs), 1-11-12 (255 pcs), 1-3-12 (245 pcs), 1-2-12 (183 pcs), 2-212 (213 pcs.). First these three forms have a pale pink color of the flower, the next four - bright pink. Distinguish three varieties of strawberry - Tarpan, E-220, Vsemirny debut and 5 hybrid forms - 1-2-12, 1-3-12, 1-11-12, 2-5-12, 2-9-12, have high ornamentality and good adaptability to environmental conditions of the region.

Peach is possible in subtropics if there are cultivars with reduced cold-demand in the winter. The paper gives a method of estimation of the cold period in relation to peach cultivars’ needs. The beginning and the end of counting the number of cold is determined: 2.5-3 months from the first coming ten days with the temperature not higher than +7,2^оC. It also specifi es the reasons for the low productivity of peach cultivars from the lack of cold in the winter. The best cultivars for Russian subtropics with the reduced cold-demand are defined.

The land use system under gardens in the south of Russia has no suffi cient compliance between the biological potential of cultures and resource capacity of the occupied territory. Fully it falls into culture of the sweet cherry showing increased requirements to soils and climate. Among the southern stone fruit crops sweet cherry on the winter hardiness concedes only to plum. Its wood tolerates the temperature to -28… -30 °C. The major limiting factors of climate are frosts during the spring period, a heat and a drought - in summer. Sweet cherry more others of the stone fruit crops is exacting to soils. It needs the loose soil, unfavorable hard loamy, clay, decanted. It is greatly demanding of air humidity. But abundance of humidity also causes a discomfort. In general, districts where average of absolute annual air temperatures falls not below -23 °C no more than in 20 % of winters are suitable for sweet cherry, the relative humidity of air during maturing does not rise higher than 70 %. That is the culture of sweet cherry for realization of its natural potential demands the corresponding conditions of the environment. It became possible to consider interrelation of a large number of biological, climatic and soil factors with the use of geoinformational technologies. Their important advantage is the possibility of carrying out the joint analysis of various level of complexity of a large number of information based on geostatistics, mathematical modeling operation and expert estimates. The results of studying of adaptability of sweet cherry to climatic, soil and relief factors of the south of Russia, which will be included in the scientifi c basis of effective technologies of cultivation of fruit crops to control the productivity of agro-ecosystems in complex landscapes of southern Russia based on geoinformational technologies, are presented. The computer maps had been received by geoinformational technologies.

The paper informs about peculiarity of cutting the seven varieties of Asian hybrids lilies. The best varieties of Russian breeding for cutting as a result of many years of study are highlighted. It is revealed that cutting of the fl owering shoots up to the level of the soil causes formation of only 2-3 flowers on each shoot in next year, that reduces the period of flowering, height of shoots and their decorative effect. Saving only 1/3 of leafy shoots zone does not inhibit the development of new shoots and provides an annual quality cut flowers. The varieties of lilies for decoration of an interiors, wedding flower bouquets and bouquets to other celebrations are recommended.