Scientific-based regime of irrigation of raspberry with dripping irrigation under the conditions of the Central Non-Black Earth Region

Abstract

Raspberries are among the important berry crops, the production volumes of which are increasing every year. To obtain high-quality planting material, high and stable yields in unstable weather conditions, it is necessary to develop resource-saving technologies, which include drip irrigation. The purpose of the research is to develop a science-based irrigation regime for drip irrigation of raspberries in the conditions of the Central region of the Non-Chernozem zone of Russia. A two-factor field experiment was established in the fall of 2019. The first factor is the drip irrigation regime (maintaining the moisture content of the root layer of the soil in the ranges of 60…80, 70…90 and 80…100% of the lowest moisture capacity), the second factor is the variety (Nagrada and Solnyshko). Drip irrigation of raspberries can significantly save irrigation water. In the variant of drip irrigation with maintaining moisture in the root layer in the range of 80…100% of the lowest moisture capacity, the savings in irrigation water compared to traditional irrigation methods averaged 65%, and in the variant of 60-80% of the lowest moisture capacity - 78%. At the same time, with the use of local irrigation, an optimal water-air regime of the soil is created. For the irrigated variants of the experiment, the main share in the total water consumption is precipitation (from 71 to 81%), and the irrigation rate - from 15 to 22%. In the variants with maintaining humidity above 70% of the lowest moisture capacity, the diameter of the stem of seedlings is 20-40% larger than in the control, the height of seedlings is 40-50%, and the yield is 2 times, which makes it possible to recommend them as optimal.