Abstract:

In order to take full advantage of the natural hazel resources and select the high-quality and strong cold resistance hazel in the basis of mastering the germplasm resources of hazel in small Xing’an ridge region, with the method of field investigation and visiting people, the author took an initial investigation about the species and distribution types, community and nut exterior quality of the hazel in small Xing’an ridge region after setting 17 typical sample lands in 4 different climatic regions. The results showed that, there were 2 prime species, such as Corylus heterophylla and Corylus mandshurica in small Xing’an ridge region, the shelling percentage of Corylus mandshurica and Corylus heterophylla were 36% and 25% respectively as peel thickness were 0.88 mm and 1.85 mm. The coefficient of variation about the seed weight, the shelling percentage, the nut weight, the peel thickness of 2 species reached above 10%. The scattered, the associated and the pure were 3 commom hazel forest distribution types, the output of the scattered was highest among 3 types. The nut weight, the peel thickness and the shelling percentage of Corylus mandshurica of Wuying Region reached 0.6049 g, 0.84 mm, 40.16% as the best hazel among the 4 investigated regions. In conclusion, the Corylus mandshurica had high value because its thinner peel thickness and higher shelling percentage than Corylus heterophylla; the sequence of seed weight, shelling percentage, nut weight, peel thickness could be as the important index of seed selection; the next selection working could be developed in Wuying Region as the exterior quality of Corylus mandshurica was higher in the region.