摘要
建植人工草地不仅是恢复极度退化高寒草地的主要措施,同时也是家畜重要的饲草来源,然而人工草地退化、使用年限较短也成为高寒地区建植人工草地的亟需注意的问题。本研究以5个草种的单播草地和混播草地为研究对象,研究了不同建植年限个草地植被特征及草场质量指数的变化。结果显示:青海草地早熟禾作为根茎型草种,随着栽培年限的增加,植被高度虽逐年降低,但植被盖度则保持较高的水平。相同管理水平下,不具根茎繁殖的麦宾草、垂穗披碱草、青海中华羊茅和青海冷地早熟禾单播人工草地植被高度和盖度均随栽培年限的增加而降低。随着栽培年限的增加,混播人工草地由于兼顾了上繁草和下繁草的搭配,其群落发育也趋于稳定,植被盖度有所降低,但差异不显著。
Establishment of the cultivated grassland is not only the main measure to restore the severe degraded alpine grassland,but also an important source of forage for livestock.However,the degradation and short service period of the cultivated grassland has become an urgent problem,It is necessary to establish the cultivated grassland in alpine areas.In this study,the vegetation characteristics and grassland quality index of five grass species were studied.The results showed that the height of Poa pratensisi C V.Qinghai decreased year by year with the increase of the cultivated years,but the vegetation coverage kept a high level.Under the same management level,the height and coverage of Elymus langutorum,Elymus nutans,Festuca sinensis CV Qinghai and Poa crymophila CV Qinghai decreased with the increasing of cultivated years.With the increase of cultivated years,the community development of mixed artificial grassland tends to be stable and the vegetation coverage is reduced,but the difference is not significan.
作者
韩海龙
李芝雯
李世雄
HAN Hai-long(Qilian Grassland Supervision Workstation of Qinghai,Qilian 810049)
出处
《青海畜牧兽医杂志》
2020年第1期22-26,共5页
Chinese Qinghai Journal of Animal and Veterinary Sciences
基金
青海省重大科技专项(2019-SF-A3)
关键词
人工草地
植被特征
群落稳定性
Cultivated grassland
Vegetation characteristics
Community stability
