我们根据马铃薯生长的规律,通过一系列试验,制定了“郑州市马铃薯三段五期栽培法”,为马铃薯稳产高产提供了依据。所谓“三段五期”是指马铃薯在生长期问,可以为三个阶段和五个时期。马铃薯播种出苗后,地下部分有规律地呈螺旋形从上到下排列着许多节,每节上有一束根和匍匐茎,并且每8个节围绕茎轴成一个周期的排列,即第一节和第九节上下正好在一条直线上。我们叫它“周期节”。第一个“周期节”形成,即是 According to the law of potato growth, we conducted a series of experiments to formulate the “Five-stage Potato Cultivation Law of Zhengzhou City”, which provided the basis for stable and high-yield potato. The so-called “three five” refers to the potato in the growing season, can be three stages and five periods. After the seedlings were planted in potatoes, the underground parts were regularly spirally arranged from top to bottom with many roots and stolons on each node, and arranged in a periodic pattern around the stem axis every 8 nodes The ninth quarter is exactly in a straight line. We call it “cycle period.” The first “cycle period” is formed, that is