| Abstrakt: |
Raspberry is an important berry crop; its production volumes increase from year to year. To produce high-quality planting material and gain high and stable yields under unstable weather conditions, resource-saving technologies, including drip irrigation, are required. The purpose of this study was to develop a scientific-based drip irrigation regime for raspberry plants cultivated in the central part of the non-Black Earth Region of Russia. A two-factor field experiment was launched in autumn 2019. The first factor (factor A) was the drip irrigation regime; the moisture content in the root layer was maintained in the following ranges: 60–80, 70–90, and 80–100% of the field moisture capacity (FMC). The second factor (factor B) was the raspberry variety: Nagrada or Solnyshko. Drip watering can substantially reduce irrigation water consumption. In the variant involving drip irrigation and moisture content in the root layer maintained in the range of 80–100% of the field moisture capacity, irrigation water savings averaged 65% compared to traditional watering techniques; in the variant involving drip irrigation and moisture content in the root layer maintained in the range of 60–80% FMC, water savings averaged 78%. In addition, local irrigation creates the optimal air and water regime in the soil. In experimental variants involving irrigation, precipitation accounted for the main part of the total water consumption (71–81%); while irrigation water for only 15–22%. In variants with soil moisture maintained at levels exceeding 70% FMC, the stem diameter in seedlings was 20–40% larger compared to the control, the height of seedlings was 40–50% larger, and the yield was twice as much as in the control variant. This makes it possible to recommend such irrigation regimes as optimal ones. [ABSTRACT FROM AUTHOR] |
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