前言在南方条件下种植马铃薯,块茎产量在一二年内就显著下降,即所谓退化。对这一现象,李森科曾解释为“当马铃薯块茎还处于马铃薯株丛之下时,或在收获后的保存时期中,高温对已萌动了的马铃薯块茎芽眼所发生的作用,乃是马铃薯在春季栽种下在南方发生退化的基本原因。”此外,李森科认为夏播留种不仅是增产措施,也是改良马铃薯本性(遗传性)的生活条件,“如果一些外界环境条件会引起植物某一些器官(例 Preface To grow potatoes in the south, the tuber yields drop significantly in a year or two, the so-called degeneration. To this phenomenon, Lysenko has explained that “when potato tubers are still under the potato plexus, or during the post-harvest preservation period, the effect of high temperatures on the germinated potato tuber buds is the effect of the spring in the spring In addition, Lysenko believes that summer sowing is not only an increase in yield, but also a living condition that improves the nature of the potato (hereditary). ”If some external environmental conditions cause certain organs of the plant (for example