青海草地早熟禾人工草地群落结构及土壤种子库研究

The study on community structure and soil seed bank of Poa pratensis cv.Qinghai cultured grassland

文章对黄河源区"黑土滩"退化草地上上种植生长第八年的青海草地早熟禾人工草地群落结构和土壤种子库特征进行了研究。结果表明:(1)青海草地早熟禾人工草地群落由23种植物组成,隶属于10科;土壤种子库由25种植物组成,隶属于12科;群落和土壤种子库中优势种均为青海草地早熟禾(Poa pratensis cv.Qinghai)植物。(2)土壤种子库中优良牧草占75.8%,多年生草本植物占到78%,土壤种子主要集中在0～2cm层。

The characteristics of community structure and soil seed bank for Poa pratensis cv. Qinghai growing for eight year on cultured grassland on Black Soil Beach of Yellow River Headwater Area were studied in this article. The results showed that： （1） There were 23 plant species in the community structure, which belonged tolO families; there were 25 plant species in the soil seed bank, which belonged to 12 families; the dominant species was Poa pratensis cv. Qinghai in the community structure and soil seed bank. （ 2 ） The excellent pasture accounted for 75.8% and the perennial herbaceous plants accounted for 78% in soil seed bank, and the soil seed mainly distributed in the 0 -2cm layer.