“Auxanometer”的意思、由来-开放百科全书

An auxanometer (Gr. {{lang|el|auxain}}= "to grow" + metron= "measure") is an apparatus for measuring increase of growth in plants.^[1]

In case of an arc-auxanometer (see picture), there is a wire fixed with the plant apex on one end and a dead-weight on the other. It passes over a pulley which has a pointer attached to it. When the plant's height increases, the pulley rotates and the pointer moves on a circular scale to directly give the magnitude of growth.^[2] The "rate of growth" is a derived measurement obtained by dividing the length of growth measured by the auxanometer, by the time said measurement took.

Sensitive auxanometers allow measurement of growth as small as a micrometer,^[3] which allows measurement of growth in response to short-term changes in atmospheric composition.^[4] Auxanometers are used in laboratory,^[4] the field,^[5] and the classroom.^[6] It is also called an arc-indicator.

See also

References

1. ^{{Cite EB1911|wstitle=Auxanometer|volume=3|page=50}}
2. ^{{NSRW Cite|wstitle=Auxanometer}}
3. ^{{citation | doi = 10.1086/330848 | title = A Precision Auxanometer | year = 1912 | author = Bovie, W. T. | journal = Botanical Gazette | volume = 53 | pages = 504 | issue = 6 }}
4. ^¹{{citation | doi = 10.1093/jxb/6.1.75 | title = Experiments on Growth in Length of Plant Organs | year = 1955 | author = Ranson, S. L. | journal = Journal of Experimental Botany | volume = 6 | pages = 75 | last2 = Harrison | first2 = A. }}
5. ^{{citation | doi = 10.1093/jxb/27.4.704 | title = A Sensitive Auxanometer for Field Use | year = 1976 | author = Gallagher, J. N. | journal = Journal of Experimental Botany | volume = 27 | pages = 704 | last2 = Biscoe | first2 = P. V. | last3 = Saffell | first3 = R. A. | issue = 4 }}
6. ^{{citation | doi = 10.2307/2435215 | title = A Simplified Precision Auxanometer | year = 1915 | author = W. T. Bovie; W. T. Bovie | journal = American Journal of Botany | volume = 2 | pages = 95–99 | jstor = 2435215 | issue = 2 }}