Abstract:
The traditional hazelnut production has changed from wild picking, extensive management toward the direction of seed breeding by the superior type of seed nursery and under standardized cultivation. The successful breeding of Ping'ou hybrid hazelnut (
Corylus heterophylla Fisch.×
Corylus avellana L.) ends the history of no cultivated species and opens a new era for the development of hazelnut industry in China. At present, the characteristics of main varieties of Ping'ou hybrid hazelnut and their suitable regions have been identified. Commonly used propagation method is mound layering of the green suckers. Softwood cutting and tissue culture seedling technology have also been successful used in practice. Ping'ou hybrid hazelnut varieties 'Ping'ou 28', 'Ping'ou 33', 'Ping'ou 62' and 'Dawei' have very strong ability of shriveling resistance. The varieties 'Ping'ou 21', 'Ping'ou 33', 'Ping'ou 545', 'Liaozhen 4', 'Ping'ou 237' and 'Liaozhen 8' have strong ability of saline-alkali tolerance. Hazel shows self-incompatibility, and no special pollination species of Ping'ou hybrid hazelnut has been found until now. To establish a hazelnut plantation, several compatible and same anthesis varieties should be selected for mutual pollination. There are few studies on the fertilization of hazel cultivation. In the future, the fertilization plan should be made according to the factors such as soil nutrient content, tree nutrition status, fertilizer-requirement period and bearing amount of tree, etc. Single-trunk or bush shape could be selected according to the climate conditions of the planting area, the land types, labor and mechanical management system. Ping'ou hybrid hazelnut has a habit of bearing mainly on the one-year-old middle-long branches, so pruning technical solutions should based on these characteristics. Pest control is an important problem in hazelnut production, so it is necessary to strengthen the research on the pest's damaging regularity, and promote biological control.