禁牧对安西荒漠化草原芨芨草光合生理生态特征的影响

Effect of Enclosure on Photo-physiological Characteristics of Achnatherum splendens in Deserted Grassland of Anxi

对安西温性荒漠化草原退牧还草围栏建设工程区芨芨草光合生理生态特征进行了监测分析。结果显示,与放牧区相比较,围栏禁牧草场环境中气温和叶温相对较低,空气湿度相对较高,二者环境有显著差异,表明禁牧极大地改善了草原牧草的生长环境。同时,禁牧区草地主要植物类群芨芨草叶片的光合速率较高,有利于其生长和干物质的积累。

The photo -physiological characteristics of Achnatherum splendens both in the enclosure and the grazing pasture were monitored in Anxi. The results showed that the difference was significant between them. The air temperature and leaf temperature were relatively lower and the relative humidity was higher in the enclosure compared with those in the grazing grassland. These indicated that the environment of grass growth was greatly improved by enclosure means. At the same time, there was higher photosynthetic rate of Achnatherum splendens in the enclosured grassland. This was beneficial to growth of grass and accumulation of dry matter.