在冬季温室牡丹催花过程中,如果对肥、气、温及加温设施等管理应用不合理,会产生一些有害气体,对牡丹叶片造成伤害,导致有花无叶,应特别注意。氨气症状温室内的催花牡丹生长迅速、叶片幼嫩、抗性较弱,当棚内氨气达到一定浓度后,首先对叶片造成伤害。受害时边缘植株较重,逐渐向里扩展,受害部位由上而下 In the process of promoting flower peony in winter, if the application of fertilizer, gas, temperature and heating facilities and other management unreasonable, it will produce some harmful gases, causing damage to the leaves of peony, resulting in no leaves of flowers, should pay special attention. Ammonia Symptoms Prompt flower peonies in the greenhouse grow rapidly, young leaves, resistance is weak, when the shed reaches a certain concentration of ammonia, the first damage to the leaves. At the time of victimization, the marginal plants are heavier and gradually expand to the inside, with the affected parts from top to bottom