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Effects of Broiler Litter and Nitrogen Fertilization on Uptake of Major Nutrients by Coastal Bermudagrass

^a USDA–ARS, Waste Management and Forage Res. Unit, Mississippi State, MS 39762
^b USDA–ARS, U.S. Dairy Forage Res. Center, Madison, WI 53706
^c Dep. of Plant and Soil Sci., Mississippi State Univ., Mississippi State, MS 39762
^d USDA–ARS, Animal Waste Management Res. Unit, 230 Bennett Lane, Bowling Green, KY 42104

View larger version (48K): [in a new window]   Fig. 1. Annual forage dry matter yield of Coastal bermudagrass receiving no fertilizer or combinations of fertilizer N and broiler litter to equal 269 kg ha–1 N in all treatments in 1999, 2000, and 2001. Values within a year with a different letter are significantly different using Fisher's protected LSD test at the 0.05 level. Values for LSD (P = 0.05) at Newton were 1.77, 1.72, and 2.59 in 1999, 2000, and 2001, respectively. Values for LSD (P = 0.05) at Mize were 1.90, 1.58, and 1.81 in 1999, 2000, and 2001, respectively.

View larger version (53K): [in a new window]   Fig. 2. Annual N uptake in Coastal bermudagrass receiving no fertilizer or combinations of fertilizer N and broiler litter to equal 269 kg ha–1 N in all treatments in 1999, 2000, and 2001. Values within a year with a different letter are significantly different using Fisher's protected LSD test at the 0.05 level; otherwise, not significant. Values for LSD (P = 0.05) at Newton were 32, 38, and 37 in 1999, 2000, and 2001, respectively. Values for LSD (P = 0.05) at Mize were 43, 40, and 40 in 1999, 2000, and 2001, respectively.

View larger version (51K): [in a new window]   Fig. 3. Annual K uptake in Coastal bermudagrass receiving no fertilizer or combinations of fertilizer N and broiler litter to equal 269 kg ha–1 N in all treatments in 1999, 2000, and 2001. Values within a year with a different letter are significantly different using Fisher's protected LSD test at the 0.05 level. Values for LSD (P = 0.05) at Newton were 38, 53, and 64 in 1999, 2000, and 2001, respectively. Values for LSD (P = 0.05) at Mize were 67, 37, and 64 in 1999, 2000, and 2001, respectively.

View larger version (49K): [in a new window]   Fig. 4. Annual P uptake in Coastal bermudagrass receiving no fertilizer or combinations of fertilizer N and broiler litter to equal 269 kg ha–1 N in all treatments in 1999, 2000, and 2001. Values within a year with a different letter are significantly different using Fisher's protected LSD test at the 0.05 level. Values for LSD (P = 0.05) at Newton were 4.8, 7.3, and 8.3 in 1999, 2000, and 2001, respectively. Values for LSD (P = 0.05) at Mize were 5.7, 5.3, and 5.9 in 1999, 2000, and 2001, respectively.