Study on the Tolerance and Critical Water Capacity of Shoot Shriveling in Hybrid Hazelnuts

LI Chun-niu; DONG Feng-xiang; WANG Gui-xi; ZHANG Ri-qing; LIANG Li-song

In order to find out the tolerance of shoot shriveling in different varieties of hybrid hazelnuts (Corylus heterophylla×C. avellana) in Beijing, the authors investigated the shoot shriveling performance of 18 hybrid hazelnuts without frost protection in winter and classified them into 4 groups , according to the results of cluster analysis. The result showed that the group with strongest tolerance of shoot shriveling included 84-254, B-3, B-21,83-33, 84-72 and 81-9, followed by the group including 84-48, 81-23, 5-127, 84-237 and 84-1; 82-11, 84-545 and 84-226 fell into the third group with weaker tolerance, and the group with the weakest tolerance of shoot shriveling comprised 84-572, 84-402, 84-69 and 84-349. In Beijing, the period of water losing in hazelnut shoot is from the first ten days of February to the last ten days of February, and the shoot water content decreases to the lowest point by the last ten days of February. The study on the relation between shoot water content and shoot shriveling showed that the critical water capacity in different hybrid hazelnuts varied, but that of most varieties was between 35% and 30%. Shoot shriveling resulted from water losing, so there was a close relationship between them, but the critical water capacity of shoot shriveling was not the only factor causing the shriveling of the shoot.

1. College of Forestry, Central South University of Forestry and Technology, Changsha 410004, Hu’nan, China

Abstract: In order to find out the tolerance of shoot shriveling in different varieties of hybrid hazelnuts (Corylus heterophylla×C. avellana) in Beijing, the authors investigated the shoot shriveling performance of 18 hybrid hazelnuts without frost protection in winter and classified them into 4 groups , according to the results of cluster analysis. The result showed that the group with strongest tolerance of shoot shriveling included 84-254, B-3, B-21,83-33, 84-72 and 81-9, followed by the group including 84-48, 81-23, 5-127, 84-237 and 84-1; 82-11, 84-545 and 84-226 fell into the third group with weaker tolerance, and the group with the weakest tolerance of shoot shriveling comprised 84-572, 84-402, 84-69 and 84-349. In Beijing, the period of water losing in hazelnut shoot is from the first ten days of February to the last ten days of February, and the shoot water content decreases to the lowest point by the last ten days of February. The study on the relation between shoot water content and shoot shriveling showed that the critical water capacity in different hybrid hazelnuts varied, but that of most varieties was between 35% and 30%. Shoot shriveling resulted from water losing, so there was a close relationship between them, but the critical water capacity of shoot shriveling was not the only factor causing the shriveling of the shoot.

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Study on the Tolerance and Critical Water Capacity of Shoot Shriveling in Hybrid Hazelnuts

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