摘要
以青藏高原"黑土滩"为研究对象,采用围栏封育、围栏封育+人工补播进行"黑土滩"草地的改良,测定了2010~2014年度"黑土滩"草地垂穗披碱草、可食牧草鲜重。结果表明,多年围栏封育、人工补播,"黑土滩"样地内的垂穗披碱草、可食牧草和牧草鲜重显著增加(P<0.05),而不可食牧草并未显著增加(P≥0.05)。进一步研究发现,与围栏封育相比,人工补播样地的垂穗披碱草比例、可食牧草比例显著增加(P<0.05)。其中,2014年度的人工补播样地内的垂穗披碱草和可食牧草比例分别为67%和73%,较2010年度分别显著增加了2.52倍和2.17倍,而围栏封育垂穗披碱草和可食牧草比例并未显著增加(P≥0.05)。以上结果表明,与围栏封育相比,短期内人工补播是退化天然草地改良更为有效的措施。
The paper tested Elymus nutans and edible forage fresh weight of 2010～2014 in “Heitutan” grass？land using grazing enclosure, grazing enclosure and reseeding, respectively. The results showed Elymus nu？tans, edible forage and total fresh weight significantly increased except for forbs fresh weight in “Heitutan”grassland after grazing enclosure and reseeding for years（P 〈0.05）. The rations of Elymus nutans and edibleforage of reseeding plot significantly increased than grazing enclosure plot（P〈0.05）. The values of Elymus nu-tans and edible forage rations were 67% and 73% in 2014, which were significantly increased by 2.52 and 2.17times than 2010, respectively. But the rations of Elymus nutans and edible forage were not significantly in-creased. These findings suggested short-time reseeding measure was more effective than grazing enclosure.
出处
《青海草业》
2018年第1期11-13,10,共4页
Qinghai Prataculture
