10
88
0J7
I
6
5
4
1 2 3
Ring
4-9. Ring number X dung application frequency interaction (P = 0.058) for bahiagrass herbage P
harvested during 2006. Ring number effects were quadratic (P = 0.073) for three dung
applications, linear (P = 0.004) and quadratic (P = 0.046) for two applications, and
not significant for one (P > 0.257) or for zero applications (P > 0.289). Standard error
of a treatment mean was 0.4 kg ha1. Ring Numbers 1 through 3 refer to sampling
areas 0 to 15, 15 to 30, and 30 to 45 cm from the center of the dung application,
respectively.
Summary and Conclusions
The objectives of this research were to determine the effects of excreta type and
application frequency to bahiagrass swards on spatial patterns of herbage DM harvested, herbage
N and P concentration, and N and P harvested responses. Spatial patterns of response were
determined by sampling swards in concentric rings (termed ring numbers, with Ring 1 being the
area closest to the center of the deposit) surrounding urine and dung deposits.
Responses to urine and dung were distinctly different. Urine application typically resulted
in greater DM harvested, N and P concentration, and N and P harvested. In contrast, dung
SDung-3
W~ Dung-2
SDung-1
--Dung-O
U