Влияние на качеството на водата върху теглото на салата, сорт Маритима.

During the period 2020-2021 researches are conducted with lettuce, Maritima variety. Pot experiments are set up, in four combinations of two soil types and two water sources. Irrigation regime is applied with differentiation of irrigation rates (m)- 100%m, 80%m and 60%m. Before starting and after the end of the experiment, some basic indicators of soils and waters are laboratory determined-pH, electrical conductivity (EC), chlorides, cation exchange capacity, etc. A change in all studied indicators is found as a result of their interaction. The amount of water-soluble TDS salts in the drained water increases from 2 to 4.8 times, the EC in the one soil decreases by 15 and 33%, and in the other it increases by 13 and 31%. The weight of the plants grown under these conditions varies, both due to the regulated irrigation regime and depending on the qualities of the water and the soil. Maximum values are obtained with one soil-water source combination and the corresponding reduction in the amount of water. The implementation of an irrigation regime with maximum irrigation rates on the same soil, but with two different water leads to a weight reduction of 20.4%. Very close values are obtained with irrigation regime 60%m and 100%m, but with two different soils and one water source. The reduction of irrigation rates by 20% in one soil type, but irrigated by water with different quality, does not affect the weight of the plants. [ABSTRACT FROM AUTHOR]