Research on grafting and propagation of Vernicia fordii branches
[Objective]Due to the immaturity of the asexual propagation technology system of tung tree,the seedlings are mainly produced by sowing seeds,which leads to the failure to maintain the excellent traits of the female parent.The study of the effects of different factors on the survival and growth of tung tree branches,and the most suitable grafting combination for tung tree grafting can provide a reference for improving the technical system of vegetative propagation of tung oil,and have certain theoretical and practical significance for the quality,efficiency and healthy development of tung oil industry.[Method]The effects of grafting time,grafting method and scion type on the survival and growth of tung tree branches were investigated by using the current year-old semi-lignified bud stem segment of the'Huatong No.1'family as the scion,and the excellent single-plant seedlings of the Aleurites montana family were used as rootstocks.[Result]The best grafting period was the summer solstice,and the highest survival rate was 91.67%,which was 10%,10%and 4.77%higher than the highest survival rates of the beginning of spring,beginning of autumn and winter solstice,respectively,with no significant difference(P＞0.05),and 25.71%,388.91%,25.71%and 25.01%higher than the highest survival rates of spring equinox,beginning of summer,autumn equinox and beginning of winter,respectively(P＜0.05);The grafting method with the highest survival rate during the summer solstice was the splitting method,with a survival rate of 87.50%,which was 9.09%higher than that of the cutting method,and the difference was not significant(P＞0.05),but 33.32%higher than that of the joining method,and the difference was significant(P＜0.05).The best type of scion was apical bud at the beginning of spring,autumn equinox,beginning of winter and winter solstice,which was 940.63%,113.61%,899.74%and 323.85%higher than that of axillary bud grafted at the same period,respectively,with significant differences(P＜0.05).The best way to unwrap the film is to gently cut the grafted film on the side of the rootstock.The grafted seedlings at 8 stages were basically healed after 60 days of germination.[Conclusion]The best season for grafting is the summer solstice,and the scion type is axillary bud,although the grafting method with the highest survival rate is the splitting method,but considering the grafting cost and grafting efficiency,the suitable grafting method is the cutting method,and the cutting operation is simple,and more than 800 plants can be grafted per person per day,which provides a practical way for the asexual seedling breeding of improved varieties of tung tree.
万方数据
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