Analysis of Fruits Oil Contents of Clones of Introduced Seabuckthorn in Three North Areas

In order to scientifically evaluate the oil content of 21 seabuckthorn clones introduced from Rus-sia, 3 oil contents of dry pulp, dry seed and dry whole fruit were analyzed by Soxhlet extraction me-thod after sampling the introduced seabuckthorn fruits from Liaoning, Heilongjiang, Gansu, Qing-hai and Xinjiang from 2016 to 2018. The overall average oil content of dried whole fruit of introduced seabuckthorn was 16.59% (114 samples), the lowest content was more than 10%, and the highest content “201322” reached 23.50%. The oil content of introduced seabuckthorn dry pulp was 20.23% ± 6.13%, which was 0.97% higher than 19.26% ± 7.44% of dry seed. There was little difference in oil content between pulp and seed. The oil content of dry whole fruit of introduced seabuckthorn was 16.59% ± 5.91%, which was 0.97% higher than 15.62% ± 5.05% (28 samples) of hybrid seabuckthorn. There was also little difference in oil content between introduced and hybrid seabuckthorn. The oil content of dry whole fruit in Xinjiang is the highest, up to 16.09% ± 5.70%, the second and third was 14.50% ± 8.88% in Liaoning and 11.75% ± 8.71% in Heilongjiang respectively. There was a large gap in the oil content of dry whole fruit among the three places. Seabuckthorn was introduced and sampled for three consecutive years to determine the oil content of dry whole fruit, which was 10.63% ± 4.04% in 2016, 21.90% ± 5.61% in 2017 and 15.83% ± 1.83% in 2018. The oil contents of the dry whole fruit in the three years showed obvious fluctua-tions of “small-large-small”. Though both the oil content of introduced seabuckthorn and hybrid seabuckthorn were very high, there were still large differences among specific varieties. The va-rieties with high oil contents, such as “201322” “201308” “201313”, etc., could be selected for es-tablishing seabuckthorn industrial raw material forest with oil as the main goal for comprehen-sive development and utilization in the suitable areas in China.