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山东省鲁中南地带群众的桑树留枝(当地群众又称留大眼,就是留旧枝)留芽(当地群众又称留青眼,书上称新稍,就是留新条)剪定方法,是我们宝贵的民族科学遗产,是当地劳动人民为了向大陆性气候的旱、寒、风害作斗争,克服肥料不足的困难,与粮食作物间作的情况下求得丰产而积累了多年的经验创造出来一套技术,其特点是高度灵活和适合桑树生理,在运用上,随树龄、品种、环境、生是情况的差别,都有相应的变化,是符于生物体与环境的统一这一观点的。这种方法可说是春蚕
Shandong Province, the central and southern Shandong Lu mulberry branches (the local people also said to stay big eyes, leaving the old branches) to stay buds (local people also said to stay young, the book said the new slightly, is to stay a new article) The precious heritage of the national sciences has been created by years of experience accumulated by local working people for years to combat drought, cold and wind hazards in the continental climate, to overcome the problems of inadequate fertilizers and to achieve high yields in the case of intercropping with food crops. Set of technology, which is characterized by highly flexible and suitable for mulberry physiology, in the use, with the age, variety, environment, students are the difference between the situation, there is a corresponding change is consistent with the view of the unity of living organisms and the environment. This method can be said that the spring silkworm