Study of the influence of irrigation norms on the productivity of raspberry plantations

  • 1 Institute of Soil Science, AgroTechnology and Plant Protection “Nikola Pushkarov", Sofia, Bulgaria


To establish the effect of irrigation of raspberries grown in soil and meteorological conditions in the area of the village of Chelopechene – Sofia, studies were conducted in drip irrigation of plantations with remontant variety “Lyulin”, testing different regimes – from full satisfaction of daily needs of the culture from water to irrigation with reduced by 20% and 40% irrigation rates. A variant under non-irrigated conditions has also been tested.
When determining the effect of irrigation of raspberries by changing the yield compared to the non-irrigated variant, it was found that in the variant with 100% irrigation rate (optimal) the increase in raspberry yield reaches 59%, and in variants irrigated with reduced irrigation rates, the size yields increased by 54% and 47% respectively. It has been proven that the optimization of the moisture in the active soil layer contributes to a significant increase and stabilization of yields, which for the experimental conditions are from 835 to 1074 kg / dka and the additional yield varies from 404 to 627, kg / dka or from 47 up to 59% on average for the study period.
The established productivity of the irrigation water is the highest in the variants with 40% reduction of the optimal norm and changes during the years of the experiment from 13.0 to 24.0 kg.ha-1 .mm-1. It is the lowest in the variants irrigated with 100% realization of the irrigation norm.


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