THE ASSESSMENT OF TECHNOLOGICAL TRAITS OF RICE GRAIN QUALITY IN THE CONDITIONS OF THEIR OVERMATURE STAND TO FORM AGGREGATED (INTEGRAL) INDEX OF GRAIN QUALITY

The study of the effect of overmature stand before harvesting on the quality of rice varieties grown in ARRI of rice (Krasnodar) has been carried out. As the material we took the grain of such rice varieties as ‘Rapan’, ‘Khazar’, ‘Favorit’, ‘Kurazh’, ‘Sharm’ and ‘Krepysh’ grown by ARRI of rice (the village of Belozerny of Krasnodar Area) and harvested in the years of 2013, 2014. The soil of the plots was rice, meadow-black earth; the arable land was characterized with the general humus content of 4.2% (according to I.V. Tyurin) and with readily hydrolyzable nitrogen of 7.3 mg/100 g (according to I.V. Tyurin and M.M. Kononova). The rice maturity in the conditions of the cold rainy September of 2013 promoted a long-term high humidity of ripe grain. In 2014 by the 7 of October all varieties achieved the humidity of ripe grain (13.1-15.3%). The rice humidity during harvesting had no effect on a fracturing of rice grain. The varieties ‘Krepysh’ (32.9-37.8g) and ‘Favorit’ (28.9-29.1g) belong to large-kerneled varieties. The rest ones belonged to middle-kerneled varieties with 24.8-25.3 g. The fracturing effect of short-kerneled varieties ‘Rapan’ and ‘Khazar’ had no significant increase in the before- harvesting period with 3-5% and 2-6% respectively. The ratio of fracturing of the early-maturing variety ‘Sharm’ was 40% in 2014 under harvesting humidity of 12.1%; and 9% in 2013 under harvesting humidity of 19.6%. The influence of the genotype on the response of the grain quality on an overmature stand has been shown in the article. We have made a conclusion about the necessity to register the genetic resources of rice varieties response on an overmature stand in the database program.

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