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一、水稻冷害类型及其危害水稻是喜温作物,在水、肥等条件满足的情况下,高温年常得丰收,低温年则往往有冷害发生。这种冷害分成两种类型,一种是延迟营养生长的“延迟性冷害”;一种是结实受害的“障碍性冷害”。“延迟性冷害”发生在水稻营养生长期,特别是水稻分蘖盛期(6月中下旬)遇上低温、少日照影响最大,但只要后期气象条件好,受害就轻或者完全不受害。“障碍性冷害”发生在幼穗分化期到灌浆期(7月中下旬至9月),特别是雌雄蕊原基分化期、生殖细胞形成期及开花期(7月中下旬至8月上旬)受害影响最重,因为在这种情况下往往
First, the type of rice chilling injury and its hazards Rice is a temperature-sensitive crops, water, fertilizer and other conditions to meet the circumstances, the high-temperature years often have bumper harvest, cold temperatures are often cold chilling occurs. There are two types of chills, one is “delayed chilling” that delays vegetative growth and the other is “obstructive chilling” that harms the victimization. “Delayed chilling injury” occurs in the vegetative growth stage of rice, especially during the tillering stage of rice (mid-to-late June), and sunshine is less affected by less sunshine. However, as long as the meteorological conditions are good in the later stage, the damage is light or not harmed at all. “Obstacle chilling injury” occurs in the panicle to the filling stage (late-mid-July to September), especially the differentiation of primordium and pistil primordia, germ cell formation and flowering (late-July to early August) Victims have the most impact, as often in this situation