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棉花是一种喜温好光、较耐旱、需水而怕渍涝的作物,不同生育期耗水量差异较大。威县是河北省的棉花主产区,整个县区的棉花播种面积在整个春季农作物的播种面积中占有相当大的比例。最近几年,河北棉区连续15天左右阴雨寡照,对棉花生长发育十分不利。一是雨水过多,空气湿度大,棉铃腐烂病会大量发生,易造成蕾铃提早脱落;二是光照差,叶片不
Cotton is a thermophile, more drought-resistant, water and afraid of waterlogged crops, water consumption at different growth stages vary greatly. Wei County is the major cotton producing area in Hebei Province. Cotton acreage in the entire county occupies a considerable proportion of the sown area of the entire spring crops. In recent years, Hebei cotton area has more than 15 days of sunshine, which is unfavorable to the growth and development of cotton. First, excessive rainfall, air humidity, cotton boll rot disease will occur in large numbers, easily lead to early fall off buds; the second light is poor, the leaves are not