【摘要】 针对我国干旱烟区水资源供需矛盾的现状,采用盆栽试验,研究分析了控制性分根交替灌水对烤烟生长发育和水分利用效率的影响,结果表明:控制性分根交替灌水量达到对照灌水量的2/3处理,烤烟干物质重减少15%,而耗水量下降了33.3%,水分利用效率大幅提高,节水效果明显;灌水量为对照灌水量的1/2时,节水效果不好,其水分利用效率低于对照处理。更多还原

【Abstract】 Aiming at the actuality of water resources scarcity in droughty tobacco-growth areas of China,this paper studied the influence of controlled partial-rootzone alternative irrigation on the growth and WUE(water use efficiency) of flue-cured tobacco through pot-cultivation experiment.The result indicated that compared with the contrast treatment,the flue-cured tobacco dry matter weight decreased by 15%,the water consumption quantity decreased by 33.3%,the WUE increased markedly,and the water-saving effect was remarkably under the treatment of controlled partial-rootzone alternative irrigation with two thirds of irrigation water quantity of the contrast treatment,but the WUE decreased and the water-saving effect was not good under the treatment of controlled partial-rootzone alternative irrigation with half of irrigation water quantity of the contrast treatment.更多还原