Sunitskaya T.V., Guchenko S.S., Burundukova O.L.
Bulletin of KrasGAU 2019; (10): 3-9
The goal of the research was looking for the parameters necessary to increase the yield of intensive varieties of new generation. The tasks of the work included comparative studies of the production process and morphological and functional characteristics of extensive and intensive varieties of rice with different yields. The research was conducted at experimental rice system at FSBSI "FSC of Agribiotechnology of the Far East named afterA.K. Chaika" (Ussuriysk, Primorsky Region). In the research there were used an extensive variety Dalnevostochny, intensive varieties Khankaisky 52, Lugovoy and Kaskad. Conducted studies showed that high yield of intensive varieties in comparison with extensive variety is determined by high level of economic efficiency coefficient (Kf). The maximum grain yield of intensive variety Khankaisky 52 which is of medium height, having a lower economic efficiency coefficient, being compared with the low stemmed varieties Lugovoy and Kaskad ensures good development of photosynthetic apparatus - large area of the upper leaves and larger leaf area index (Lai), and highest yield of biomass (Ybiom.). Comparative analysis led to the conclusion that it was necessary to correct the morphotype of short-growing intensive rice varieties in Primorye. To increase the productivity the prospect for increasing the following morphological and functional characteristicsis as follows: plant height up to 80-85 cm, the yield of above-ground biomass up to 12-14 t/hectare, the area of the top 3 leaves up to 115-125 cm2, the value of leaf indices up to 3.5-4 while maintaining a high level of harvesting index up to - 55-57 %, average and grain quality.
