“Northern vigor”的意思、由来-开放百科全书

词条

Northern vigor

释义

References

{{Orphan|date=March 2017}}Northern vigor is an effect seen in certain varieties of produce where varieties of plants grown in northern climates, then moved to southern climates, are hardier, better-producing, and better tasting.^[1] This effect has been primarily observed in potatoes, but is also seen in strawberries^[1] and garlic.^[2]^[4] The Saskatchewan Seed Potato Growers Association has trademarked the term "Northern Vigour" for use with their potatoes,^[2] but the effect is seen in produce grown throughout Canada and the northern United States.^[4]

The exact cause of northern vigor is not known, but there are many theories. Some believe it has to do with the length of the days in northern latitudes,^[2] or that it has to do with the combination of cold nights and hot days.^[2] Others believe that the cold may kill off any disease that would otherwise affect plants from the south.^[2] Still others think that the switch from a colder climate to a warm, less harsh environment makes it easier for the plants to thrive.^[2] Researchers in Saskatchewan discovered that tubers raised in the cold and then moved to a warm environment undergo a series of physiological changes that may trigger more vigorous growth.^[3]

References

1. ^{{cite web | url=http://www.saskfruit.com/pdf/19990185_10920029457.pdf | title=Northern Vigour® of Strawberry Crowns | publisher=University of Saskatchewan | date=March 2002 | accessdate=2013-06-11 | author=Lokken, J. | author2=Storey, G. | author3=Tanino, K.}}
2. ^¹²³⁴⁵⁶{{cite book|author=Amy Jo Ehman|title=Prairie Feast|url=https://books.google.com/books?id=dNZ6fbbwMlAC&pg=PA216|accessdate=11 June 2013|date=28 April 2010|publisher=Coteau Books|isbn=978-1-55050-413-2|pages=215–216}}
3. ^¹²{{cite web | url=http://www.ag-innovation.usask.ca/final%20policy%20briefs/CAIRN_13_Clark.pdf | title=Are clawbacks always efficient? Northern vigor in Canada | publisher=Canadian Agricultural Innovation Research Network | work=CAIRN Policy Brief | date=May 2008 | accessdate=2013-06-11 | author=Power, Natasha | author2=Clark, J. Stephen | format=PDF | volume=13}}

1 : Agriculture

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