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近年来,由于受多种因素的影响,棉花早衰现象有所加重。特别是2005年,宁晋县有近1万亩的棉花出现了不同程度的早衰,其特点:一是早衰症状显现早,部分棉田在8月中下旬已经显露早衰症状;二是早衰比例大,严重地影响了棉花的产量和品质。1早衰的症状棉花出现早衰首先表现为叶片普遍落
In recent years, due to a variety of factors, cotton premature decline phenomenon has increased. Especially in 2005, Ningjin County, nearly 1 million mu of cotton appeared varying degrees of premature aging, its characteristics: First, premature senility symptoms appear early, part of the cotton field in late August has been exposed premature senility symptoms; the second is the proportion of premature aging, Seriously affected the yield and quality of cotton. Symptoms of premature aging Premature aging of cotton first showed the leaves generally fall