【摘要】 为了阐明洱海流域烤烟的耗水规律和水分利用效率，以烤烟品种K326为研究对象，在云南大理磻溪村进行大田实验，运用水量平衡公式和彭曼公式对烤烟的耗水量、耗水强度、耗水模数、水分利用效率等进行了研究。研究结果表明：随着烤烟的生长发育，其耗水量、耗水强度、耗水模数和作物系数均呈现先增大后减小的变化规律，均在旺长期达到最大值；在6个气象要素中，相对湿度对烤烟耗水量的直接影响最大，土壤温度的直接影响最小，且空气温度、风速、日照时数、土壤温度通过相对湿度对烤烟耗水量的抑制作用均最大；随着烟株的生长发育，水分利用效率呈现持续上升的趋势，以成熟期的水分利用效率最高。更多还原

【Abstract】 To clarify the water consumption patterns and water use efficiency of flue-cured tobacco in the Erhai Lake Basin,flue-cured tobacco K326 was used as the research object, and a field experiment of flue-cured tobacco was conducted in Panxi Village, Dali City, Yunnan Province. The water consumption, water consumption intensity, water consumption modulus and water use efficiency of flue-cured tobacco were studied by water balance formula and Penman formula. The results showed that with the growth and development of flue-cured tobacco, the water consumption, water consumption intensity, water consumption modulus and crop coefficient of flue-cured tobacco increased first and then decreased, and reached the maximum in the vigorous growth period. Among the 6 climatic factors that affected water consumption, relative humidity had the greatest direct impact on water consumption, while soil temperature had the smallest impact on tobacco water consumption. Air temperature, average wind speed, sunshine duration and soil temperature had the largest inhibitory effect on water consumption of flue-cured tobacco through relative humidity. With the growth and development of the tobacco plant, the water use efficiency showed a continuous increasing trend, and reached the highest in mature period.更多还原