| 青藏高原几个主要环境因子对植物的生理效应 |
| |
| 引用本文： | 刘志民,杨甲定,刘新民.青藏高原几个主要环境因子对植物的生理效应[J].中国沙漠,2000,20(3):309-313. |
| |
| 作者姓名： | 刘志民 杨甲定 刘新民 |
| |
| 作者单位： | 中国科学院,寒区旱区环境与工程研究所,甘肃,兰州,730000 |
| |
| 基金项目： | 中国科学院1996年度“西部之光”资助项目 |
| |
| 摘 要： | 青藏高原作物生育期间的太阳辐射及其强度，均高于我国内地，而且短波辐射比例大，光照时间长，不仅直接影响植物的光合作用、呼吸作用等重要代谢过程，而且不同光质对高原植物株的生长高度、根系的萌生发育、叶绿素含量以及碳水化合物、蛋白质、脂肪等贮藏物质的积累等方面都有不同的影响。昼夜温差大这一环境特点与高原作物高产之间的关系尚存争论，但对作物的品质确实有明显的影响作用。在高海拔、低气压ＣＯ２含量、低Ｏ２含量）
|
| 关 键 词： | 青藏高原 环境因子 植物生理 效应 |
| 修稿时间： | 1999-09-20 |
Effects of Several Environmental Factors on Plant Physiology in Qinghai-Xizang Plateau |
| |
| LIU Zhi-min,YANG Jia-ding,LIU Xin-min.Effects of Several Environmental Factors on Plant Physiology in Qinghai-Xizang Plateau[J].Journal of Desert Research,2000,20(3):309-313. |
| |
| Authors: | LIU Zhi-min YANG Jia-ding LIU Xin-min |
| |
| Abstract: | This paper briefly summarized the effects on plant physiology of several main environmental factors in Qinghai-Xizang Plateau, such as plentiful solar radiation, great temperature range, high elevation and low air pressure. The total quantity and intensity of solar radiation are both higher in Qinghai-Xizang Plateau than in lowlands during crop development. And the content of short-wavelength radiation is higher, the duration of illumination is longer too. Not only can these characteristics directly affect some important metabolic processes, such as photosynthesis and respiration, but also different light quality has different influence on growing length of plant shoot, development of root, content of chlorophyll, and accumulation of carbohydrates, protein and fat, etc. Although there is some controversy about the relationship of great temperature range to high yield of plateau crop, high temperature range can distinctly influence the quality of crop, as some researches indicated that the content of protein or carbohydrate of crop is positively related to the temperature range during crop development. Under the condition of high elevation, low air pressure(low CO\-2 density and low O\-2 density), plant always shows the increasing of light saturation point, the decreasing of light compensation point, the falling of adaptive temperature of photosynthesis and the lowered rate of dark respiration etc. So plateau plant can fully utilize light energy and accumulate more dry matters. Furthermore, high elevation can affect the forming of different metabolic products in plant. This paper also systematically analyzed the reason of high yield of plateau crop(Wheat). Although the other environmental factors such as intense solar radiation, high content of blue violet light, great temperature range etc are indispensable, the elongation of crop developmental duration caused by low annual average temperature is the main reason for high yield of dry matters and grains in plateau region. Lastly, this paper made some suggestions to the future development of the study of plant physiology in Qinghai-Xizang Plateau. |
| |
| Keywords: | Qinghai-Xizang Plateau environmental factor plant physiology effect |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
