The influence of drop irrigation and loading of inflorescences on the growth and development of the mother bushes of grapes

Abstract

The high yield of grafted grape seedlings and their quality depend on many factors, including the quality of graft and rootstock components, which in turn is determined by proper care of the mother plantations of grape. Their farming techniques should be aimed at better growth and maturation of shoots. On mother bushes, the technological reception of shoot fragments is mandatory, partial removal of inflorescence is not so common in the agricultural techniques of mother plantings, but has a positive effect on the overall development of plants. Mother plantings should be irrigated if possible, as insufficient moisture supply negatively affects the condition of the bushes throughout the growing season and winter. In this work, the effect of partial removal of inflorescence (load of inflorescence 100, 75 and 50% of their total number) on mother bushes and the effect of different irrigation regimes (levels of pre-irrigation soil moisture 90, 80 and 70% of the lowest moisture capacity) on the condition of mother plantations, in particular on physiological, biochemical and biometric parameters of plants. It is shown that irrigation of bushes and reduction of inflorescence load to 50 and 75% of their total number stimulated the accumulation of chlorophyll in the leaves of mother plants, improved watering of leaf tissues, increased respiration during active growth and development of grapes. There is a positive effect of irrigation and reducing the load of inflorescence bushes to 50 and 75% on the biometrical parameters of mother grape bushes. The largest values of the total length of shoots and the degree of their maturation were in the bushes of variants with 90% the lowest moisture capacity, 50% inflorescence, 80% the lowest moisture capacity 50% inflorescence, 70% the lowest moisture capacity 50 and 75% inflorescence. Thus, effective irrigation regimes and reducing the load of inflorescence contributed to the growth of medium and strong full-fledged shoots, which are more productive.