Arid
DOI10.1080/15324982.2015.1107152
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
ISSN1532-4982
EISSN1532-4990
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.
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