Rice splitting by tillering at various plant density and doses of nitrogen fertilizers
Rice is very important for the human diet. Tillering is one of the positive factors for increasing its productivity. Plants with good tillering may form more dense and productive haulm stand, compensate plants losses from unfavorable growth conditions and allow using less seeds for sowing. Therefore developing such kind of varieties for conditions of Russia is important. Aim of research - to study mode of inheriting the trait of high tillering and to determine impact of various plant density and doses of nitrogen fertilizers. Plants were placed in 3 variants of crop density -2x15, 15x15, 30x30 cm and in 5 nutritional backgrounds: no fertilizers, 30, 60, 90 and 120 kg/ha. We have studied early ripening domestic rice variety Virage (japonica), late-ripening variety Lampo and hybrid population obtained from their crossing. As a result of studies it was found that change in plant density and dose of nitrogen fertilizer changes the mean value of the trait. Reducing crop density results to varying degree of dominance in different variants of the experiment, changing mode of inheriting the trait. Increasing doses of fertilizer didn’t affect the inheritance of the trait significantly.