| 土壤干旱对沙棘苗木生长及水分利用的影响 |
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| 引用本文： | 李丽霞,梁宗锁,等.土壤干旱对沙棘苗木生长及水分利用的影响[J].西北植物学报,2002,22(2):296-302. |
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| 作者姓名： | 李丽霞 梁宗锁 |
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| 作者单位： | 1. 中国科学院水土保持研究所,西北农林科技大学,陕西杨陵,712100
2. 山东烟台大学化学生物理工学院 |
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| 基金项目： | 中国科学院“知识创新项目”( KZCX-0 6 -0 3)，“西部之光”项目，黄河上中游管理局基金项目( 1 9970 0 1 ) |
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| 摘 要： | 研究了土壤干旱条件下盆栽沙棘苗木生长、光合和水分关系的变化。结果表明，同样环境条件下，蒸腾速率随干旱胁迫程度加重而降低，而蒸腾日进程差异不大，均为单峰曲线，峰值出现在11：00；轻、中度干旱胁迫下沙棘叶含水量、水势、渗透势、膨压下降幅度较小，光合速率、侧枝生长速率保持在较高水平，能维持基本的生长量，表现出耐旱植物的生理特征；重度干旱胁迫使上述指标下降较显著，且长时间胁迫后，33．3％沙棘幼苗死亡。
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| 关 键 词： | 沙棘 干旱胁迫 水分生理 生长 抗旱性 光合作用 水分利用 |
| 文章编号： | 1000-4025(2002)02-0296-07 |
| 修稿时间： | 2001年5月31日 |
Effect of soil drought on the growth and water use efficiency of seabuckthorn |
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| LI Li-xi,LIANG Zong-suo,HAN Rui-lian.Effect of soil drought on the growth and water use efficiency of seabuckthorn[J].Acta Botanica Boreali-Occidentalia Sinica,2002,22(2):296-302. |
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| Authors: | LI Li-xi LIANG Zong-suo HAN Rui-lian |
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| Institution: | LI Li-xia,LIANG Zong-suo *,HAN Rui-lian |
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| Abstract: | Pot-cultured seabuck thorn seedling's growth,photosynthesis and water relations under soil water stress were researched.The main results showed that:transpiration rate (Tr) declined with the deepening of soil water stress,while the diurnal change of Tr had little change.They all displayed parabolic shape,which peak value was at 11:00.The decreasing range of water content,water potential,osmotic potential and turgor were smaller,and leaf growth rate of side shoot and photosynthesis rate (Pn) in a higher level under light stress and medium water stress,which showed the typical physiological character belonging to drought-enduring plant.Serious soil water stress made above index fell remarkably and 33.3% seabuckthorn seedlings died after long term drought stress. |
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| Keywords: | Hippophae rhamnoides L drought stress water physiology growth drought resistance photosynthesis |
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