UDC 633.854.54; 631.572
The generalized productivity assessment of oil-bearing flax of dual-use is done in the area of dry Steppe of Ukraine. The production potentialities and expediency of applying straw of oil-bearing flax to obtain fibrous raw materials are substantiated. It is found out that under different conditions of irrigation the yielding capacity of seeds reaches 1.65 and 2.16 t/ha according to an appropriate cultivation technology.
Irrigation has the most significant influence on the crop, it provides the increase of flax productivity by 34.9 %. Fertilizer application predetermines the seed productivity 1.41 – 1.43 times higher. Under conditions of dry land the application of mineral fertilizers of N90P60K60, the sowing rate of 6 mln pcs/ha, the row spacing of 15 cm provide the obtaining of 0.64 t/ha of oil and 2.36 t/ha of straw which contains 0.34 t/ha of bast suitable for use.
Under conditions of irrigation the application of mineral fertilizers of N90P60K60, the sowing rate of 7 mln pcs/ha, the row spacing of 15 cm make it possible to obtain 0.85 t/ha of oil and 3.19 t/ha of straw which contains 0.68 t of bast. It is determined that agrotechnical measures which provide the increase of seed productivity simultaneously predetermine rising the value of straw as a raw material. Wastes of fibre production, when consuming for heating, make it possible to obtain the energy of 30 – 37.4 Hecto-joule /ha.
The mathematical models for calculating the output of oil, bast and energy according to the change of elements of the crop’s cultivation technology are created. The measures for raising the efficiency of cultivation and dual-use of oil-bearing flax are proposed.
Key words: oil-bearing flax, seed, straw, straw processing, fibre, bast, bioenergetics.