水肥胁迫对槟榔幼苗生长及生理特性的影响

该文研究了不同水肥胁迫处理对盆栽槟榔幼苗生长及生理特性的影响.结果表明:在水分和养分胁迫处理下,随着胁迫时间的延长,槟榔幼苗的生长受到抑制,株高和叶面积增速缓慢,根冠比增大;叶片质膜透性增大,可溶性糖和脯氨酸质量分数升高,在处理60d和90d时分别与其对照的差异具有统计学意义;SOD活性呈先上升后下降的趋势,在60d时达到高峰;POD酶活性呈上升的趋势,在90d时达到最大值;在试验处理期间与对照相比,质膜透性、可溶性糖和脯氨酸质量分数的变化幅度大;其次是SOD酶和POD酶活性;植株的株高和叶面积的变化较慢.

The Effect of Water and Nutrient Stress on the Growth and Physiological Characters of Areca catechu L.Seedlings

The effect of water and nutrient stress on the growth and physiological characters of Areca catechu L.seedlings were studied.The results obtained were as follows: under water and nutrient stress treatment,with the prolonging of stress time,plant growth was inhibited: the increase in plant height and leaf area slowed down,and the root/shoot ratio increased greatly;leaf membrane permeability,soluble sugar content and proline content increased and showed significant difference from those of the control on the 60th and 90th days from the commencement of the treatment;the activity of SOD first increased and then decreased and reached the peak level on the 60th day,but the activity of POD showed an increasing tendency and the highest value was attained on the 90th day.During the experiment,compared to the control treatment,the variable indexes were listed as: leaf membrane permeability,soluble sugar content and proline content>the activity of SOD and POD>plant height and leaf area.