| 词条 | Trifolium arvense |
| 释义 |
|name = Trifolium arvense |image = Trif arvense042.JPG |image_caption = |regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Rosids |ordo = Fabales |familia = Fabaceae |subfamilia = Faboideae |genus = Trifolium |species = T. arvense |binomial = Trifolium arvense |binomial_authority = L. }} Trifolium arvense , commonly known as hare's-foot clover,[1] rabbitfoot clover,[2] stone clover or oldfield clover, is a flowering plant in the bean family Fabaceae. This species of clover is native to most of Europe, excluding the Arctic zone, and western Asia, in plain or mid-mountain habitats up to {{convert|1600|m}} altitude. It grows in dry sandy soils, both acidic and alkaline, typically found at the edge of fields, in wastelands, at the side of roads, on sand dunes, and opportunistically in vineyards and orchards when they are not irrigated. DescriptionIt is a small erect herbaceous annual, or sometimes biennial plant, growing to 10–40 cm tall. Like all clovers, it has leaves divided into three sessile leaflets, which are slender, 1–2 cm long and 3–5 mm broad, and sometimes edged with small hairs and finely serrated. The leaves have a pair of stipules at the base, often tipped in red. The flowers are grouped in a dense inflorescence 2–3 cm long and 1-1.5 cm broad; each flower is 4–5 mm long, rosy white in colour, and especially characterised by the many silky white hairs which tip the five sepals, which are much larger than the petals. These hairs, along with the more or less oblong form of the inflorescence, are the inspiration for the common name. Pollination is carried out by bees, or via autogamy, since the plant is hermaphroditic, and the flowering season is from mid-spring to late summer. The fruit is a small pod containing a single seed. Cultivation and usesLike most legumes, it fixes nitrogen, making it valued on low fertility soils for the benefit it gives to other crop species in supplying nitrogen. It is also grazed by sheep and goats. It has been introduced to North America, where it is an invasive species in some areas. Scientists at AgResearch in New Zealand have used genetic modification to take a single gene from Trifolium arvense and put it into the more common white clover, Trifolium repens. The genetically modified clover could reduce bloating in livestock and decrease methane emissions. The release of the genetically modified clover is expected to be approximately 2025.[3] References{{Wikiversity-bc|Trifolium arvense}}{{Wikispecies}}
1. ^{{cite web |title=BSBI List 2007 |publisher=Botanical Society of Britain and Ireland |url=http://www.bsbi.org.uk/BSBIList2007.xls |format=xls |accessdate=2014-10-17 |deadurl=yes |archiveurl=https://www.webcitation.org/6VqJ46atN?url=http://www.bsbi.org.uk/BSBIList2007.xls |archivedate=2015-01-25 |df= }} {{Taxonbar|from=Q125813}}2. ^{{PLANTS|id=TRAR4|taxon=Trifolium arvense|accessdate=15 December 2015}} 3. ^{{cite news |url=http://www.3news.co.nz/GM-breakthrough-could-have-huge-climate-benefits/tabid/423/articleID/161031/Default.aspx#top |title=GM breakthrough could have huge climate benefits |author=Hayes, Samantha |date=15 June 2010 |work=3 News |accessdate=24 November 2011}} 6 : Flora of Europe|Flora of Estonia|Flora of Lebanon|Flora of the United Kingdom|Trifolium|Plants described in 1753 |
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