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对毛乌素沙地不同飞播年限的4个播区进行调查研究,通过对盖度、重要值以及生活型的研究和分析,说明飞播对沙地退化植被有明显的改善作用。分析表明:飞播后飞播植被盖度随时间逐年增加,由14%增加到33%,说明飞播后植被得到良好的恢复;飞播后在不同的沙丘部位植被盖度各不相同,但是随着飞播年限的增加沙丘各部位的盖度相差不大;各飞播植物种的盖度和重要值随飞播年限的增加而变化,在飞播后的24年中呈现出不同的消长动态。飞播改良了沙地土壤的性质,使多年生和一年生的草本植物在群落中得以生长,随着飞播年限的增长,飞播群落的结构逐渐复杂,群落更趋于稳定。
The investigation and study of four broadcast areas with different seasons of aerial broadcasting in Mu Us desert showed that aerial seeding could significantly improve degraded vegetation in sandy areas through the study and analysis of coverage, important values and life forms. The results showed that the coverage of the airborne seeding increased with the increase of the seeding rate from 14% to 33% year after seeding, which showed that the vegetation was well recovered after the seeding. The vegetation cover varied in different parts of the dune after airborne seeding. However, The cover and the important value of each species of sowing seeding changed with the increase of the seeding years, showing different dynamics of growth in the 24 years after the aerial seeding. Astronautics improved the properties of sandy soils and allowed perennial and annual herbaceous plants to grow in the community. With the increase of the seeding period, the structure of the aerial sowing communities gradually became more complicated and the communities tended to be more stable.