摘 要 ：盆栽条件下，研究了陕单9号玉米(zea mays L．)在根区不施保水剂(对照)、分根区施保水剂和根区全施保水剂3种处理下，叶片气孔导度、CO2吸收和H2O蒸腾的变化。结果表明，在75％土壤饱和持水量下，各指标在3种处理之间没有明显差别；在50％土壤饱和持水量下，分根区施保水剂显著降低了叶片气孔导度，叶片CO2吸收量和H2O蒸腾量也同时降低，但H2O蒸腾量下降幅度更大；在两种水分条件下，分根区施保水剂均能提高玉米单叶水分利用效率(water use efficiency，WUE)。
Abstract:Leaf stomatal conductance,CO_2 absorption and H_2O transpiration of maize ( Zea mays L.) "Shaandan 9" were studied in potted experiment between control (no aquasorb applying),aquasorb rootzone-divided use,and aquasorb roorzone use fully.The results indica