烟草的每个品种都有它自己的相对高度与叶片数。由于受到不良气候因素及营养不良的影响,烟株生长受阻,发育加速,过早的转入生殖生长,使顶端生长点停止生长,提早进行花芽分化,尚未达到正常生长的高度与叶片数,而现蕾开花,即为早花。它严重影响产量和质量,降低经济效益。 产生早花的原因很多,主要是低温、阴雨过长与寡照。20度以下的低温和寡日照有利于 Each variety of tobacco has its own relative height and number of leaves. Due to the adverse climate factors and malnutrition, the growth of tobacco plants was blocked, the development accelerated, prematurely transferred into reproductive growth, the top of the growth point to stop growing, early flower bud differentiation, has not yet reached the normal growth height and leaf number, and Budding flowering, which is early flowering. It has a serious impact on production and quality, reducing economic efficiency. There are many reasons for early flowering, mainly low temperature, long rain and oligospermia. 20 degrees below the low temperature and widowhood is conducive