Assessing solar energy and water use efficiencies in winter wheat

Asrar, G.; Hipps, L. E.; Kanemasu, E. T.

The water use and solar energy conversion efficiencies of two cultivars of winter wheat (Triticum aestivum L., vars, Centurk and Newton) planted at three densities, were examined during a growing season. Water use, based on soil moisture depletion, was the lowest under the light, and the highest under the heavy planting densities of both cultivars. Water use efficiency of medium and heavy planting densities were greater than the light planting densities in both cultivars. The canopy radiation extinction coefficients of both cultivars increased with increases in planting density. Efficiency of operation interception of photosynthetically active radiation by both cultivars improved from the time of jointing until anthesis, and then decreased during senescence. The efficiency of the conversion of intercepted radiation to dry matter (biochemical efficiency) decreased throughout the growing season both cultivars. The interception, biochemical, and photosynthetic efficiencies improved as planting density increased.

Document ID

19830019042

Acquisition Source

Legacy CDMS

Document Type

Contractor Report (CR)

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Date Acquired

September 4, 2013

Publication Date

September 1, 1982

Subject Category

Report/Patent Number

Accession Number

83N27313

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Public

Work of the US Gov. Public Use Permitted.

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