叶片数量对欧李嫩枝扦插成活与生长的影响

[目的]探究欧李带叶嫩枝扦插繁殖机理，以促进欧李扦插繁殖在生产中的应用。[方法]以山西农业大学欧李4号品种为试材，在嫩枝插奈上设不同数量的完整叶片以及同数量的半叶处理，研究不同留叶量的欧李插条生根、萌芽及生长情况。[结果]试验得出，欧李无叶嫩枝插条不生根。在插条留1～3片叶的情况下，随着叶片数量的增加，生根率、萌芽率、成活率和新根数量在增加；其中，留半叶3片的生根率、成活率最高，3片叶的萌芽率最高。扦插后10～13d萌芽速率最快，在13～17d时萌芽速率减缓，有利于成活率的提高。插条的叶片数量对后期新梢的生长影响较小。[结论]欧李嫩枝扦插应留有一定数量的叶片，以保证插条的生根和萌芽；并在合适的留叶数量时，选择半叶处理比全叶处理能减少水分损失，从而提高成活率。

Effects of the Number of Leaf on the Survival and Growth of Chinese Dwarf Cherry Shoot Cutting

[Objective] The mechanism of the multiplication of Chinese dwarf cherry[Cerasus humilis(Bge.)Sok]cutting with leaves was researched for its application in actual production.[Method] Chinese dwarf cherry cultivar-Nongda No.4 was used as materials in the experiment.The treatment of the shoot cuttings with the different number of complete leaves and the same number of the half leaves were designed to study the rooting rate,germination rate and shoot growth of cutting.[Results] The results showed that leafless cuttings failed to rooting.The rooting rate,germination rate,survival rate and number of new roots was increased with the increment of leaf in the range of 1-3 leaves.The rooting rate and survival rate of three semi-leaves' cutting was highest,and the germination rate of three complete leaves' cutting was highest.The peak period of germination rate of the cutting was from the 10th to 13th day and after the 13th to17th day the germination velocity of cutting was decreasing,which was propitious to its survival.The leaf numbers had little influence on new shoot growth in the later period.[Conclusion] Some leaves should be kept in the cutting of Chinese dwarf cherry for its rooting and germination and in suitable number of leaf the treatment of semi-leaf with less loss of water could promote the survival rate of the cutting.