今年我场积极扩种罗马尼亚油用向日葵,但因缺乏栽培管理经验,灌头水后普遍发生不同程度死苗现象,造成严重减产。为此,我们作了调查研究。一、外部症状茎秆弯曲下垂,叶片灰白萎蔫,主根腐烂变黑,整块地的苗就象开水烫过似的。受害轻的尚能慢慢恢复生长,重的枯焦死亡。二、死苗原因死苗处多为低洼盐碱地,死苗由多种因素造成,但主要是: This year, I actively expanded Romania’s use of sunflower oil, but due to a lack of cultivation and management experience, there is a general phenomenon of dead seedlings of varying degrees after filling with water, resulting in serious production cuts. To this end, we made a survey. First, the external symptoms of stems bent sagging, gray leaves wilting, rotting black roots, the whole piece of seedlings like boiling water like. Light damage can still slow recovery growth, heavy dead focus. Second, dead seedlings cause dead seedlings mostly low-lying saline-alkali soil, dead seedlings caused by many factors, but mainly: