ECONOMIC ASSESSMENT OF DRIP IRRIGATION REGIMES OF A GRAPE NURSERY IN THE CONDITIONS OF THE SOUTH OF UKRAINE

Abstract

The article presents the results of research to determine the economic efficiency of different modes of drip irrigation in the grape nursery. It has been established that the economic effect is achieved by increasing the yield of standard seedlings from the nursery, saving irrigation water, electricity, observing rational schemes of planting grafts in the nursery. The purpose of the research is to conduct an economic assessment of different modes of drip irrigation of grape nursery, to determine the most effective for implementation in production. Methods. Field, laboratory, and computational methods were used in the work.Results. According to the scheme of researches, grape grafts were planted in a nursery by a tape with one and two rows, in each tape mounted one or two drip tapes. Pre-irrigation soil moisture at the grape nursery was maintained at different levels – 100– 90% of the lowest moisture capacity (LMC), 100–80% LMC, 100–90–80% LMC, and 100–80–70% LMC. It is shown that the highest level of profitability in the cultivation of grafted grape seedlings was in the variants where the grafts were planted in the nursery with a tape in two rows and with the mounted of one drop tape, and LPSM supported 100-90% LMC and 100-90-80% LMC – 346, 7% and 340.2%. They were somewhat inferior in this respect to the options where the grafts were also planted in the nursery with a tape in two rows, but for their watering mounted two drip tapes – 333.5% and 337.0%. When planting grape grafts in the nursery with tape in one row and with the maintenance of LPSM 100-90% LMC, 100-80% LMC, 100-90-80% LMC the level of profitability of the technology of growing grafted grape seedlings was almost at the same level – 254.1-259.2%.Variants of the experiment with the maintenance of LPSM 100-80-70% LMC, regardless of the schemes of planting grafts in the nursery, were characterized by the lowest level of profitability - 133.8%. He was second only to control 2 with a level of profitability – 42.7%. Conclusions. The economic effect of drip irrigation on the grape nursery was achieved by increasing the yield of standard seedlings from the nursery, saving irrigation water, electricity, and compliance with rational schemes of planting grafts in the nursery. The highest level of profitability of growing grafted grape seedlings was in the variants where the grafts were planted in the nursery with a tape in two rows with the mounted of one drop tape, and soil moisture was maintained at 100-90%, 100-80 % HB and 100-90-80% HB. In these variants, it was equal to 346.7%, 334.4% and 340.2% with 305.6% in control 1. The cost of used energy resources and their production volumes decreased, on average, by 72.0-78, 0%. These modes of drip irrigation of grape seedlings are recommended for use in nurseries and nursery practitioners.