旱地甘蔗若干生理特性比较及其与抗旱性的关系

选用Ｆ１７２、Ｆ１３４、选蔗３号、桂糖１１号和粤糖５７／４２３为试验材料，于分蘖期、伸长初期、工艺成熟初期分别测定叶片细胞膜相对透性、ＮＡＤＰ－苹果酸酶活性、转化酶活性、光合色素含量以及叶片Ｎ，Ｋ，Ｃａ，Ｍｇ，Ｍｎ，Ｆｅ含量。结果表明：耐旱能力强的品种如Ｆ１７２，在旱地栽培时能保持较高的酶活性及光合色素含量，叶片细胞膜透性小，不耐旱品种粤糖５７／４２３则有相反的表现。选蔗３号叶片内Ｋ，Ｃａ，Ｍｇ等大量矿质元素含量较高，这可能是通过渗透调节作用影响其抗旱能力。

Comparison of Some Physiological Activities of Sugarcane Varieties and Their Relationship to the Drought-Resistant Ability

Using five sugarcane varieties, i. e. F172, F134, Xuanzhe 3, Guitang 11 and Yuetang 57/423 as plant materials cultivated under general non-irrigation field condition) ten physiological characters in leaves of each varieties were determined in different stages. The experimental results showed that t he drought-resistent variety, for example, F172, had higher activity of enzymes and contents of photosynthetic pigment, and had less penetration of cell membrane, as compared to the non-drought resistant variety, Yuetang 57/423; Suanzhe 3 had a higher content of nutrient elements, especially major elements K, Ca, Mg in leaves, that could influence the drought-resistent ability through osmotic regulation.