The introduction of Onobrychis sibirica in Yakutia

The research objective was the assessment of Onobrychis sibirica on the major biological and economic indicators on the adaptability to adverse factors of cryolithozone. The research problems were: 1) studying biomorphological features of Onobrychis sibirica in Privilyuysk zone of the Republic of Sakha (Yakutia)- the accumulation of aboveground phytomass of Onobrychis sibirica; size and the nature of the placement of root system; ratio of aboveground and underground phytoweight; 2) the allocation among collection material of the most perspective forms of Onobrychis sibirica for further selection work with them. The objects of the research were perspective varieties of Onobrychis sibirica. The accounts and observations were made according to methodical indications of All-Russia scientific research institute of forages of W.Williams (1986). Mathematical processing of experimental material was carried out according to B. N. Dospekhov (1985), G.R. Lakina (1990). It was established that generative shoots on the plants of Onobrychis sibirica had been formed for the second year of life (to 14 shoots on 1 plant). The height of plants of the best samples reached 83 cm. The ratio between elevated and underground part for the second year of life of Onobrychis sibirica increased with 1:0.4 (the first year of life) to 1:2.2 testifying to its high drought resistance. Four samples from the Nyurbinsk ulus appeared to be the most productive on an exit of green material, their numbers 113 - 1600 g; 77 - 1570 g; 78 - 1130 g and 112 - 1050 g. Thus, as a result of the research it was established: Onobrychis sibirica increased powerful root system below the arable horizon of permafrost soils promoting its high drought resistance; the ratio between elevated and underground bodies made 1:2.2. On the efficiency of seeds and fodder weight the samples of local population from the Nyurbinsk area were allocated (their numbers - 77, 78, 79, 85, 112 and 113).