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棉花产量和品质的形成是外界环境条件对棉株综合作用的结果。特别是棉铃的生长与温度、水分、肥力和光照等因素的关系更为密切。本文以大田调查和小区试验资料为依据,着重分析研究在干热风的影响下棉花蕾铃脱落规律,从而为制订预防措施提供参考。 一、干热风造成蕾铃大量脱落,产量锐减 一般认为棉铃生长发育的适温为25—30℃,需水量占总耗水量的45—60％;33℃以上高温或田间持水最小于55％,对棉花花器官的发育和棉铃的生长都有一定影响。据库尔勒垦区22年气象资料,7月份(花铃期)平均温度26.1℃,平均最高温度32.3℃,平均日照时数300.4小时,日照率66％,加之
The formation of cotton yield and quality is the result of the combined effect of external environmental conditions on cotton plants. In particular, the growth of bolls is more closely related to factors such as temperature, moisture, fertility and light. Based on field investigation and plot test data, this paper analyzes and analyzes the rules of cotton buds falling off under the influence of dry and hot wind, so as to provide a reference for the formulation of precautionary measures. First, the hot and cold caused by a large number of buds falling off sharply, generally believed that the growth and development of cotton bolls suitable temperature 25-30 ℃, water demand accounted for 45-60% of the total water consumption; 33 ℃ above the water temperature or field minimum 55 %, On cotton flower organ development and cotton boll growth have a certain impact. According to the 22-year meteorological data of Korla reclamation area, the average temperature in July (flowering period) is 26.1 ℃, the average maximum temperature is 32.3 ℃, the average sunshine duration is 300.4 hours and the sunshine rate is 66%