Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1614/IPSM-08-104.1 |
Variable Impacts of Imazapic Rate on Downy Brome (Bromus tectorum) and Seeded Species in Two Rangeland Communities | |
Morris, Christo2; Monaco, Thomas A.1; Rigby, Craig W.1 | |
通讯作者 | Monaco, Thomas A. |
来源期刊 | INVASIVE PLANT SCIENCE AND MANAGEMENT |
ISSN | 1939-7291 |
EISSN | 1939-747X |
出版年 | 2009 |
卷号 | 2期号:2页码:110-119 |
英文摘要 | The herbicide imazapic is registered for use on rangelands and provides effective short-term control of certain invasive annual grasses. However, details about optimal application rates for downy brome and susceptibility of simultaneously seeded species are lacking. Thus, we investigated downy brome and seeded species responses to variable rates of imazapic (0, 35, 70, 105, and 140 g ai/ha) in two plant communities (salt desert shrub and Wyoming big sagebrush). In autumn 2003, plots were treated with imazapic and seeded with one of five perennial plant materials (Siberian wheatgrass [’Vavilov’ and the experimental source Kazak]; prostrate kochia [’Immigrant’ and the experimental source 6X], and Russian wildrye [’Bozoisky II’]). Downy brome cover and seeded species establishment were evaluated in spring 2004 and 2006. Downy brome cover in 2004 decreased with increasing imazapic rate at both sites, although more so at the Wyoming big sagebrush site. In 2006, no difference in downy brome cover existed among herbicide rates at the Wyoming big sagebrush site. At the salt desert shrub site, the high rate of imazapic reduced downy brome cover by about 25% compared to untreated plots. ’Vavilov’ Siberian wheatgrass was the only seeded species with lower downy brome cover in 2006 than 2004. Seeded species establishment increased with imazapic rate in the salt desert shrub community, but in the Wyoming big sagebrush community it peaked at intermediate rates and declined at higher rates. Variation in downy brome control and seeded species establishment might have been associated with differences in precipitation, soil organic matter, and disturbance history between sites. Overall, imazapic was useful for helping establish desirable perennial species, but unless downy brome is reduced below a critical threshold, favorable precipitation can return sites to pretreatment levels within two years. |
英文关键词 | Assisted succession integrated weed management rangeland seeding seedling establishment |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000208507300002 |
WOS关键词 | STARTHISTLE CENTAUREA-SOLSTITIALIS ; WESTERN NORTH-AMERICA ; ANNUAL GRASSES ; INFESTED RANGELAND ; PERENNIAL GRASSES ; INVASIVE WEEDS ; PLANTS ; VEGETATION ; REHABILITATION ; DISTURBANCE |
WOS类目 | Plant Sciences |
WOS研究方向 | Plant Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/161150 |
作者单位 | 1.USDA ARS, Forage & Range Res Lab, Logan, UT 84322 USA; 2.Utah State Univ, Dept Wildland Resources, Logan, UT 84322 USA |
推荐引用方式 GB/T 7714 | Morris, Christo,Monaco, Thomas A.,Rigby, Craig W.. Variable Impacts of Imazapic Rate on Downy Brome (Bromus tectorum) and Seeded Species in Two Rangeland Communities[J],2009,2(2):110-119. |
APA | Morris, Christo,Monaco, Thomas A.,&Rigby, Craig W..(2009).Variable Impacts of Imazapic Rate on Downy Brome (Bromus tectorum) and Seeded Species in Two Rangeland Communities.INVASIVE PLANT SCIENCE AND MANAGEMENT,2(2),110-119. |
MLA | Morris, Christo,et al."Variable Impacts of Imazapic Rate on Downy Brome (Bromus tectorum) and Seeded Species in Two Rangeland Communities".INVASIVE PLANT SCIENCE AND MANAGEMENT 2.2(2009):110-119. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。