水分胁迫下盆栽棉花渗透调节能力的研究

Study on the Ability of Osmotic Adjustment of Potted Cotton under Water Stress

盆栽试验表明，在水分胁迫下，新陆早４号的渗透调节能力较系５的渗透调节能力强，两品种的渗透调节能力均随水分胁迫程度的增加而提高。由光合强度的日均值变化可知，渗透调节能力在轻、中度水分胁迫下，可考虑将其作为棉花抗旱性强弱的一个指标。

The results showed that both Zhao4 and Xi5 had ability of osmotic adjustment and the ability of two varieties all increased as the water stress increased.But the ability of osmotic adjustment in Zhao4 was greater than it in Xi5.The ability of osmostic adjustment can be used as torget of dry resistance,according to the average value of diurnal photosynthesis,except serious water stress.