封育对云南退化山地草甸植物种类及盖度的影响

对云南退化的山地草甸进行了为期3年的禁牧封育，并对其进行监测，研究了禁牧封育对退化山地草甸的改良作用。结果表明，禁牧封育对恢复退化山地草甸物种丰富度和草地盖度有明显的效果。禁牧封育后草地植物的盖度明显提高，植物种类增加很快，植物组成发生了显著变化。经过3年的封育，植物种类由27种增加到57种，是封育前的2倍多,封育第4年，植物物种基本稳定。封育措施有效恢复了不同退化程度山地草甸的物种丰富度和草地盖度,遏制了草地退化,是治理南方草地退化的有效途径。

Effects of enclosure on the plant species and coverage of degenerated upland meadow in Yunnan Province

The effect of enclosing on the improvement of degenerated upland meadow was conducted.The result showed that this measure was very effective to restore plant species richness and coverage on deteriorated upland meadow.After 3 years of enclosure,the number of plant species increased from 27 to 57,2 times more than before;and reached stable at the 4th year.It was concluded that enclosure was an effective way to inhibit grassland degradation,restore plant species richness and coverage in southern China.