高、中、矮三种多年生禾草混播比例试验

EFFECTS OF DIFFERENT PERENNIAL GRASS MIXED CULTURE ON THE GRASS YIELD

"黑土型"退化草地的治理应根据本地区草地退化的严重程度,采用不同治理模式。种植多年生牧草混播人工草地,可恢复"黑土型"退化草地植被,有效遏制草地退化,使草地生态环境得到改善。通过对多年生牧草不同混播比例下产草量、草层高度、植被盖度的测定分析,得出垂穗披碱草、中华羊茅、冷地早熟禾混播比为1:0.5:0.5适合称多县"黑土型"退化草地种植。

＂Black- soil -type＂ degraded grassland＇s government should act according to the order of severity which this local grassland degenerates, uses the different control pattern. The planting perennial grass mixes broadcasts the artificial grassland, may restore ＂black -soil -type＂ degraded grassland vegetation, and keep within limits the grassland to degenerate effectively, enables the grassland ecological environment to be improved. Through mixes differently to the perennial grass broadcasts under the proportion to produce the grass quantity, the grass layer height, the vegetation degree of cover determination analysis, result show that Elymus nutance, Festuca sinensis, and Poa crymophila mixed broadcasts fitting ratio is 1： 0. 5：0. 5, for Chenduo County＂ black - soil - type＂ degraded grassland＇s planting.