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一、水稻死苗原因1.霉病和冷害1.1发生与危害霉病又称绵腐病、立枯病,常发生于寒潮期间。在低温阴雨期间,连续5d日平均温度在11℃以下霉病就会发生。一般是北边的厢头先发病,稻谷已坏或者扎根不好的弱苗先发病。秧厢两头和厢两边发病重,中间轻;抗寒力弱的品种霉病更重。当低温阴雨长达5d以上,叶龄2.5~3.0叶,秧苗叶片特别是心叶黄中带红,或者在已经死亡的稻谷或弱苗上开始发霉即预示霉病可能大发生。这时就要认真检查,
First, the reasons for dead rice seedlings 1. Mold and cold damage 1.1 Occurrence and damage Mold disease, also known as cotton rot, blight, often occurs during the cold wave. During low temperature and rainy days, the average temperature of 5d consecutive day below 11 ℃ mildew will happen. The first is generally the first wounded in the north, the rice has been bad or poorly rooted weak first disease. The two sides of the box and the trunk of the serious onset of disease, light in the middle; cold hardy varieties mildew heavier. When low temperature rainy up to 5d above, leaves 2.5 to 3.0 leaves, seedling leaves especially yellow heart leaf yellow, or in the dead rice or weak seedlings moldy indicates that mold may occur. At this time we must carefully check,