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1干旱原因试验表明,种子胚部生长器官甚至分生组织细胞营养物质的亏缺,造成分生组织的饥饿,以致难以维持自身的生命活力,便会影响种子的发芽率。根据2010年河北省承德市的资料,2010年大旱是历史罕见的(4～9月份的降水量比常年少50%～80%),玉米提前10d进入乳熟期。承德市受灾面积达83.7%,全年粮食减产57.8%。干旱造成玉米种子成熟度差,种胚发育不良,千粒重降低,影响了种子芽率。
1 Drought cause tests show that seed embryo growth organs and even meristematic cell nutrient deficiencies, resulting in the starvation of meristem, making it difficult to maintain their own vitality, it will affect the seed germination rate. According to the data of Chengde City in Hebei Province in 2010, the severe drought in 2010 was rare in history (50% to 80% less precipitation in April and September than in normal years) and maize entered the milk-ripening stage 10 days earlier. Chengde affected area of 83.7%, annual food production cut 57.8%. Drought caused poor maturity of maize seeds, embryo development dysplasia, reduced grain weight, affecting seed germination rate.