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棉花早衰指棉花在开花结铃期,因生育不良或发生病害,使棉叶过早脱落,导致铃轻、籽秕、纤维成熟差而减产。在棉花生产上,早衰现象每年都有发生,严重时减产达20％～50％。然而,在大面积早衰的田块,这种现象往往被误认为是棉株的自然衰老,欠收了也找不出原因。 一、早衰的成因 1.水分的影响。7～8月是棉花的花铃期,生长旺盛,需水量大。该期间气温偏高,光照强,蒸发量大,如遇干旱,易
Premature aging of cotton refers to the cotton bolls in the flowering period, due to poor fertility or disease, so that cotton leaves off prematurely, resulting in boll light, seed 秕, poor fiber maturity and yield. In cotton production, the phenomenon of premature aging occurs every year, in severe cases, the yield is reduced by 20% to 50%. However, in fields with large areas of premature aging, this phenomenon is often mistakenly identified as the natural aging of cotton plants and can not be found for reasons of insufficient income. First, the causes of premature aging 1. The impact of moisture. July to August is the cotton boll stage, vigorous growth, water demand. High temperatures during this period, light, evaporation, in case of drought, easy