土壤水分对烤烟形态和耗水特性的影响

Effect of Soil Water on Configuration and Character of Water Consumption in Flue-cured Tobacco

采用防雨控水试验,研究了不同生育期水分处理对烤烟形态和耗水特性的影响。结果表明:在烤烟生长发育的各个阶段,随土壤相对含水量升高,烟株的株高和叶面积明显增大,对叶数的影响较小,对干物质积累与分配的影响较为复杂。各处理组合均以W2的水分利用效率最高。随土壤含水量增加,烤烟各生育期的耗水量和棵间蒸发量增大,全生育期内烤烟的耗水量呈单峰曲线,耗水量与烟叶产量呈二次曲线关系。

Based on experiment data and meteorological data,we analyzed the character of configuration and water consumption of flue-cured tobacco in different water level. The results showed that the plant height and leaf area were increased obviously with the increasing of soil relative water content at various growing stages. The dry matter content and distribution was complicatedly affected by soil water, which had a little effect on the number of leaves. It was also found that water use efficiency (WUE) of treatment W2 in all disposal combination is the highest. In the whole growing period of tobacco plant, the change of evapotranspiration had a single-peak curve. With the adding of soil water content,the evapotranspiration and soil evaporation were increased. The water consumption of tobacco was related to yield through a binomial function.