为了从生态学角度弄清楚桑的种植密度与生育的关系,用苗地进行了试验。即苗地设计为亩植333株、666株、2,000株、4,000株、6,666株及10,000株六个密度;用剑持品种于五月中旬,以株行距等间隔将老枝条插成方形,种植第一年的调查结果如下: In order to clarify the relationship between mulberry planting density and fertility from the ecological point of view, experiments were conducted on seedlings. In other words, Miao was designed to plant 333 acres of grasses, 666 trees, 2,000 trees, 4,000 trees, 6,666 trees and 10,000 trees with six densities. In the mid-May of the same year, The first year’s findings are as follows: