Copper nutrition of cereals and forages grown in Prince Edward Island
1989
Gupta, U.C.
Field experiments were conducted in Prince Edward Island, Canada to determine the effect of Cu applied in the form of copper sulfate as a foliar spray and to the soil; and the effect of chelated Cu as a foliar spray on Cu concentration and yields of wheat (Triticum aestivum L.), oats (Avena sativa L.), alfalfa (Medicaqo sativa L.), and timothy (Phleum pratense L.). Copper treatments had no significant effect on the yield of cereals or forages (data not reported). The Cu concentration in the check treatments ranged from 3.4 to 6.6 microgram g-1 and 4.4 to 12.1 microgram g-1 in the cereals (boot stage tissue and grain) and forage plant tissues, respectively. The cereal grain Cu concentration was not affected but the boot stage tissue and first cut forage tissue Cu concentration increased with Cu applications with highest values occurring in the foliar spray treatments. The first cut of forages from the soil and foliar applied Cu treatments generally had more Cu than the second cut. The Cu values as high as 54 microgram g-1 in timothy and wheat not related to Cu toxicity.
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