Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1080/15324982.2015.1107152 |
Uprooted buffelgrass thatch reduces buffelgrass seedling establishment | |
Jernigan, Marcus B.1; McClaran, Mitchel P.1; Biedenbender, Sharon H.2; Fehmi, Jeffrey S.1 | |
通讯作者 | Fehmi, Jeffrey S. |
来源期刊 | ARID LAND RESEARCH AND MANAGEMENT
![]() |
ISSN | 1532-4982 |
EISSN | 1532-4990 |
出版年 | 2016 |
卷号 | 30期号:3页码:320-329 |
英文摘要 | Buffelgrass (Pennisetum ciliare (L.) Link), a non-native perennial bunchgrass, invades ecologically intact areas of the Sonoran Desert. It competitively excludes native plants and increases fire frequency and intensity. Since the 1990s, whole buffelgrass plants have been manually uprooted and removed to control the invasion in southern Arizona. Uprooting plants results in bare, disturbed soil which promotes buffelgrass seed germination. This study examined whether leaving entire uprooted buffelgrass plants (thatch) on a field site reduces future buffelgrass establishment compared to removing uprooted plants from the site. A secondary goal was to determine whether light reduction and autoallelopathy were major factors in the negative effect of thatch on buffelgrass seedling density. Field plots with an average of 8,095 kg/ha thatch had 1.9 buffelgrass seedlings/m(2) which was significantly fewer than the 2.9 seedlings/m(2) in plots without thatch. Thatched portions of thatch plots (50% of their total area) had only 0.7 seedlings/m(2). In the greenhouse, which reduced outdoor light intensity by 35.2%, buffelgrass seeds sown in bare soil resulted in significantly higher seedling density than beneath buffelgrass thatch. Potential autoallelopathic chemicals leached from partially decomposed buffelgrass thatch and leached thatch had an intermediate but not significant (p = 0.09) effect on seedling numbers. Results suggest that leaving uprooted buffelgrass plants has the benefit of reducing seedling establishment in the area disturbed by uprooting. |
英文关键词 | Autoallelopathy invasive species shading southern Arizona |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000376986000007 |
WOS关键词 | SONORAN DESERT ECOSYSTEM ; CENCHRUS-CILIARIS L. ; PENNISETUM-CILIARE ; GRASS ; TRANSFORMATION ; PASTURES ; ARIZONA ; LITTER ; CAMUS ; SOIL |
WOS类目 | Environmental Sciences ; Soil Science |
WOS研究方向 | Environmental Sciences & Ecology ; Agriculture |
来源机构 | University of Arizona |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/191515 |
作者单位 | 1.Univ Arizona, Sch Nat Resources & Environm, POB 210137, Tucson, AZ 85721 USA; 2.Coronado Natl Forest, Tucson, AZ USA |
推荐引用方式 GB/T 7714 | Jernigan, Marcus B.,McClaran, Mitchel P.,Biedenbender, Sharon H.,et al. Uprooted buffelgrass thatch reduces buffelgrass seedling establishment[J]. University of Arizona,2016,30(3):320-329. |
APA | Jernigan, Marcus B.,McClaran, Mitchel P.,Biedenbender, Sharon H.,&Fehmi, Jeffrey S..(2016).Uprooted buffelgrass thatch reduces buffelgrass seedling establishment.ARID LAND RESEARCH AND MANAGEMENT,30(3),320-329. |
MLA | Jernigan, Marcus B.,et al."Uprooted buffelgrass thatch reduces buffelgrass seedling establishment".ARID LAND RESEARCH AND MANAGEMENT 30.3(2016):320-329. |
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。