Wednesday, November 7, 2007
296-13

Effect of Micronutrients on Yield and Quality in Sugarbeet Production.

Laura Overstreet, David Franzen, and Norman Cattanach. North Dakota State University, 1041 4th Street N, Fargo, ND 58102-3703

Boron and sulfur deficiencies have been reported with increasing frequency in the sandier soils of the Red River Valley of the North for sugarbeet production. Soil tests often indicate relatively low levels of zinc, copper, boron, and other micronutrients. Critical deficiency levels for sulfur and most micronutrients are not known for sugarbeet production in this growing region. It is also suspected that plant nutrients are tied up by organic matter, which frequently tests two percent or more in these soils. As a response to potential sulfur and micronutrient availability problems, a study was conducted in 2006 in two western Minnesota locations to establish sugarbeet response to these plant nutrients on sandier soils in this region. Although there were sugarbeet near the site locations showing obvious symptoms of boron deficiency, there were no symptoms at the study sites, nor were there improvements in yield or sugar production from boron application. Likewise, there was no improvement in yield or sugar as a result of sulfur fertilization. Both sites displayed significant improvements in yield and sugar production as a result of sodium and iron application. Sodium can substitute for potassium to a point, and these soils were markedly low in potassium. Although sites was fertilized as recommended for potassium, it is possible that plants were still potassium deficient and were using sodium as a substitute to help with osmotic regulation. Since 2006 was a drought year, sodium and potassium may have aided in reducing drought stress. There was no evidence of soil crusting or other adverse soil physical properties as a result of sodium application, nor was there any visual enhancement due to gypsum application (the sulfur treatment). This study is considered preliminary and current research is being conducted based on the results of the reported study.