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一、在植物生长发育过程中普遍存在由幼态到老态的各个发育阶段我国早在一千多年前的南北朝东魏时期(公元544年),贾思勰著《齐民要术》一书中,曾经提到果树的嫁接接穗,因采用的部位不同与结果早迟和树形好坏有直接相关。这就是说果树不同部位存在着不同发育阶段。 A·Carl Leopold认为苹果实生苗的
First, in the process of plant growth and development ubiquitous from the larval to the state of the various stages of development As early as a thousand years ago in the Northern and Southern Dynasties during the Eastern Wei Dynasty (AD 544), Jia Sizi “Qi Min Yao Shu” in a book, Once mentioned the grafting of fruit trees scion, due to the different parts of the results and the results of early and tree quality is directly related. This means that different parts of the fruit tree have different developmental stages. A. Carl Leopold thinks of apples as seedlings