摘要
通过0cm5、cm1、0 cm和15 cm四个不同刈割留茬高度的试验处理,对“黑土滩”上建植的混播人工草地群落结构及生产力进行了研究,结果表明:随着留茬高度的降低,人工草地混播群落中垂穗披碱草和中华羊茅成为减少种,早熟禾则为增加种,西伯利亚蓼成为侵入种;人工草地优良牧草垂穗披碱草和中华羊茅在群落生物量中所占的比例呈下降趋势。因此,适宜的刈割留茬高度可保持“黑土滩”混播人工草地的群落稳定性和草地生产力。
The community and the productivity of artificial miking seeded grassland in "the black soil type" were investigated at 0 cm,5 cm, 10 cm and 15 cm after being mowed.The results showed that Elymusnutans and Festuca sinensis decreased, but poa spp . increased and polygonum sihiricum increased in the community. The biornass pmpotion of fine forage, Elymusnutans and Festuca sinensis, in the artifical grassland in the community dropped along with increasing of mowing high. The artificial vegetation community tended gradually to stablity and come to the top vegetation community finally along with keeping stubble high increasing progressively.
出处
《青海大学学报(自然科学版)》
2006年第4期16-17,20,共3页
Journal of Qinghai University(Natural Science)
基金
国家"十五"攻关项目(2001BA606A-02)
关键词
刈割
人工草地
“黑土滩”退化草地
群落演替
mow
artificial grassland
"black soil type" degraded grassland
communities succession