Biological features of new varieties of rice under different irrigation mode in the conditions of Primorsky krai
The shortened mode of flooding (ensuring seedlings, due to natural soil moisture) is the the mode of growing rice in the Federal State Budget Scientific Insitution “Federal Scientific Centre of Agricultural Biotechnology of the Far East named after A.K. Chaika”. Intermittent flooding (creating a of 10-12 cm layer of water) a layer of water prevents weeds from sprouting, prevents this, which can reduce the cost of weed control, thereby reducing the cost of growing rice. Creating a layer of water in the rice field immediately after sowing negatively affects the germination of both rice seeds and weed seeds. Under a layer of water, germinating rice seeds are affected by factors such as oxygen concentration, temperature and light. The layer of water in the rice field should be such that would be most consistent with the biology of rice on the one hand and would be a means of weed control on the other. The aim of the study is to determine the influence of two irrigation regimes (intermittent and shortened) on the intensity of seed germination and productivity of a new variety of Almaz rice and a promising variety of Karmel it rice in the conditions of the Primorsky Territory. The novelty of research is to obtain experimental data on the biological characteristics of promising rice varieties of the Federal State Budget Scientific Insitution “Federal Scientific Centre of Agricultural Biotechnology of the Far East named after A.K. Chaika”, under different irrigation regimes. As a result, the Carmelite rice variety, with intermittent flooding, showed growth dynamics, according to all indicators, due to an increase in the feeding area and a longer maturation period, and the Diamond rice variety due to low field germination and a shorter growing season, there is a decrease in yield under this irrigation regime.