一、僵苗特征幼苗生长发育过程受到抑制。表现为幼苗矮小，叶片小、薄，颜色淡，茎细，根小，新根发生少，花芽分化不正常，开花少，定植后易出现花打顶现象。产生原因（１）温度太低；（２）长期阴天；（３）苗期水分供应不足；（４）养分缺乏，生长控制过分。预防技术（１） First, the characteristics of stiff seedling seedling growth and development was inhibited. The results showed that the seedlings were short and small, the leaves were thin, the color was light, the stems were thin, the roots were small, the emergence of new roots was less, the flower buds were not well differentiated, the flowering was less and the phenomenon of flower topping appeared after the planting. Causes (1) temperature is too low; (2) long-term cloudy; (3) lack of water supply in seedling stage; (4) lack of nutrients, excessive growth control. Prevention Technology (1)