不同灌水条件下烤烟耗水特征和用水效率的研究

Study on Water Consumption Characteristics and Water Use Efficiency of Flue-cured Tobacco under Different Irrigation

１９９１～１９９２年连续两年采用地栽和大田试验相结合的方法研究了不同灌水条件下烤烟的耗水特征和用水效率，结果表明，大田期烤烟的耗水具有前期少、中期多、后期又少的规律性，伸根期烟田耗水量约占全生育期总耗水量的１６％～２０％，旺长期约为４４％～４６％，成熟期约占３５％～３７％。随灌水量增大，烟田耗水量增加，而烟草对水分利用率降低。

The water consumption characteristics and water use efficiency of flue-cured tobacco under different irrigation have been studied for two years in 1991-1992 by the combination of soil culture experiments in both cement ponds and fields. The results showed that the amount of water consumption of tobacso was less at the early stage, more at the middle stage and declined again at the later stage in the field growing period,About 16%--20% of total water consumption in the whole growing period of tobacco plants was at the root extending stage,44%-46% at the vigorous growing stage and 35%-37% at the maturing stage,respectively.With the increasing amount of irrigation,the amount of water consumption in the tobaccofields increased,but the water use efficiency of tobacco plants decreased.