砧木和接穗苗龄对顶插接法西瓜嫁接苗生长发育的影响

采用二因素完全随机设计,研究不同砧木和接穗苗龄对顶插接法西瓜嫁接苗成活率、嫁接苗形态指标、叶绿素含量及根系活力的影响。结果发现,随着砧木苗龄的增大,嫁接苗的根系活力均呈先增加后降低的趋势,叶片数、接穗干质量、嫁接成活率、茎粗、叶片叶绿素含量的变化各异;随着接穗苗龄的增大,嫁接苗的嫁接成活率、叶片数、茎粗、接穗干质量、叶片叶绿素含量、根系活力均表现为先增高后降低的趋势。采用隶属函数法综合评价西瓜嫁接苗的质量,发现接穗苗龄9~13d、砧木苗龄11~15 d的西瓜嫁接苗隶属函数值较大,是适合西瓜顶插接法的接穗和砧木最佳苗龄时期。

Effects of Different Scion and Rootstock Ages on Growth & Development of Watermelon Seedlings Grafted by Hole Insertion Method

This paper studied the effects of 6 scion ages and 6 rootstock ages on graft survival rate，morphological index，chlorophyll content and root activity of seedlings grafted by hole insertion method using 2 factors completely randomized design．The result showed that the root activity firstly increased then decreased along with the increasing of rootstock age．The changes in leaf number，scion dry weight，graft survival rate，stem diameter，chlorophyll content of leaves were varied．With the increasing of scion age，graft survival rate，leaf number，stem diameter，scion dry weight，chlorophyll content of leaves and root activity were all increased then decreased．These watermelon seedlings with 9-13 days scion ages and 11-15 days rootstock ages had higher subordinative function value evaluated by method of membership function．These are the suitable ages of scion and rootstock for grafting by hole insertion method．