京东板栗适宜生长在河北省燕山南麓长城沿线一带,受土壤特点和施肥失衡影响,京东板栗可能出现一些营养元素的过量或缺乏,影响树体生长,甚至影响产量和坚果品质。1营养元素作用及失调症状1.1氮春季板栗生长期消耗氮素最多,春季补氮利于新梢生长,使叶片肥厚浓绿,提高光合能力,促进花芽分化和果实发育,可大幅增产。氮素不 Jingdong chestnut is suitable for growth along the Great Wall along the south foot of Yanshan in Hebei Province. Depending on the characteristics of the soil and the unbalanced fertilization, some excess or deficiency of nutrients may occur in the chestnut of Jingdong, affecting the growth of the tree and even affecting the yield and quality of the nut. 1, the role of nutrition and the symptoms of disorders 1.1 nitrogen spring chestnut consumption of nitrogen during the growing season, spring nitrogen in the shoot growth, the leaf thick green, improve photosynthetic capacity and promote flower bud differentiation and fruit development, a substantial increase in yield. Nitrogen is not