一.光照不足特指立秋后到开花这段时间。这时秋菊受昼夜温差及短日照的影响,生长加快,几乎在40天左右就要完成发叶、长茎、孕蕾的过程。光照不足,不利于光合作用,尤其不利于花芽的分化、形成。花芽发育迟缓,会延误开花时间。二.氮肥过量秋菊尤其是标本菊,不但要求花大,更要求茎粗、叶肥大。要达到这样的标准,往往会有所谓“鸡太肥了不生蛋”的矛盾。正确的做法是9月以前多氮、钾,少磷肥,让菊花扩展根系和长叶,9月以后多磷、钾,少氮肥,具 A light enough refers to the legislation after the fall to flowering this time. At this time Qiu Ju affected by the temperature difference between day and night and short sunshine, growth accelerated, almost 40 days or so will complete the process of leafing, long stems, pregnant buds. Lack of light, is not conducive to photosynthesis, in particular, is not conducive to flower bud differentiation, the formation. Stunted flower buds can delay flowering time. Two. Nitrogen excess Chrysanthemum especially chrysanthemum, not only requires large flowers, but also require thick stems, leaves hypertrophy. To achieve such a standard, often there will be so-called “chicken is too fat not to be born” contradiction. The correct approach is September before the more nitrogen, potassium, less phosphate, let the chrysanthemum to expand roots and leaves, after September, phosphorus, potassium, less nitrogen, with