Abstract
The influence of the composition of organic and mineral substrates on the germination and development of rice varieties "Yantar", "Favorit", "Aykerim" grown on a rack hydroponic installation was studied. Foam glass, perlite, mineral wool (agrowool), coconut substrate, and jute rug were tested as substrates. The influence of organic and mineral substrates turned out to be ambiguous on different varieties of rice in terms of germination and biometric characteristics. Agrowool substrates and coconut fiber substrates are the most favorable for Aykerim and Favorit varieties. Perlite and foam glass substrates are universal, all three varieties can be grown on them, but they are inferior in terms of biometric indicators. The jute substrate turned out to be less favorable for the studied rice varieties, moreover, it is completely unsuitable for the Yantar variety.