Dynamics of nitrate content in sugar beet leaves as affected by copper and boron foliar application
1996
Domska, D. | Bobrzecka, D. | Wojtkowiak, K. (Akademia Rolniczo-Techniczna, Olsztyn (Poland). Katedra Chemii Rolnej)
The effect of copper and boron foliar application on nitrate content in sugar beet leaves was studied in field experiment in 1987-91. Significant changes of nitrate content in leaves during vegetation were found in beets fertilized with low N doses (100 kg N/ha). This fertilizing, with or without B addition, more than with Cu, did not supply sufficient N doses for sugar beets during full row covering. Foliar B application in doses 0.6 kg/ha + 140 kg N/ha limited nitrate cumulation in final growth period allowing to use the leaves for animal feeding. However, foliar Cu application at rates 0.1-0.2 kg/ha increased nitrate contents in leaves along the whole vegetation period by 0.03-0.25% dry weight
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