摘要
对金昌市国槐、沙枣、新疆杨和圆柏进行了ＰＶ曲线主要水分状况参数的测定；从叶水势、相对水分亏缺、束缚水含量、束水比及细胞弹性模量的测算结果分析了树种的抗旱特性：圆柏和国槐是以较坚硬的细胞壁保存体内水分，维持高水势的膨压，以低的水分亏缺及高的束缚水含量与束水比的方式完成生命过程的；沙枣和新疆杨是以柔软具弹性的细胞壁在低水势下保持膨压，以低束缚水含量、低的束水比和高的水分亏缺方式完成其生命过程的。从综合抗旱性指数的测算结果得出的抗旱性排序为：圆柏＞国槐＞沙枣＞新疆杨。
Through determining the leaf water pressure, water deficiency, bound water quantity and its ratio and the elastic modulus of cells, the nature of drought resistance of 4 trees was comprehensively analysed with PV technology. The results showed that Sabina and Chinese scholartree have hard cell wall, higher water pressure, lower water deficiency, higher bound water and ratio; and Narrow-leaved oleaster and Taklimakan poplar have soft and elastic cell wall, lower water pressure, higher water deficiency, lower bound water and ratio. The comprehensive indicators suggested the order of drought-resistance of these trees: Sabina>Chinese scholartree>Narrow-leaved oleaster>Taklimakan poplar .
出处
《中国沙漠》
CSCD
北大核心
1997年第3期301-303,共3页
Journal of Desert Research
