Lentz, R.D. and Lehrsch, G.A. (2012) Nitrogen Availability and Uptake by Sugarbeet in Years Following Manure Application. International Journal of Agronomy. 2012:1-12. 04 June 2012.
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The use of solid dairy manure for sugarbeet production is problematic because beet yield and quality are sensitive to deficiencies or excesses in soil N, and soil N availability from manure varies substantially depending on the year of application. Experimental treatments included combinations of two manure rates (0.33 and 0.97 Mg total N ha-1) and three application times, and no manure treatments (control and urea fertilizer). We measured soil net N mineralization and biomass, N uptake, and yields for sprinkler-irrigated sugarbeet. On average, the 1-year-old, low-rate manure, and 1- and 2-year-old, high-rate manure treatments produced 1.2-fold greater yields, 1.1-fold greater estimated recoverable sugar, and 1.5-fold greater gross margins than that of fertilizer alone. As a group the 1-year-old, low-rate manure, and 2- and 3-year-old, high-rate-manure treatments produced similar cumulative net N mineralization as urea fertilizer; whereas the 1-year-old, high-rate manure treatment provided nearly 1.5-fold more N than either group. With appropriate manure application rates and attention to residual N and timing of sugarbeet planting, growers can best exploit the N mineralized from manure, while simultaneously maximizing sugar yields and profits.
|NWISRL Publication Number:||1419|
|Subjects:||Irrigated crops > Sugarbeet|
Soil > Chemistry > Nitrogen
|Depositing User:||Jeanne Farnea|
|Date Deposited:||13 Jun 2012 14:43|
|Last Modified:||13 Jun 2012 14:43|
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