Comparison of Raw Dairy Manure Slurry and Anaerobically Digested Slurry as N Sources for Grass Forage Production
Table 9
Soil microbial analyses from field plots in the spring, 2009ā2011.
Biomass
Bacteria
Fungi
Bacteria to fungi
Anaerobe
Mono-unsaturated
g kgā1
Mole percenta
Mole percent
ratio
Mole percent
Mole percent
May 2009
Control
535 ab
0.246
0.098
3.01
0.091
0.338
Urea
433 c
0.246
0.092
3.23
0.092
0.348
Raw-B
538 ab
0.243
0.093
3.18
0.094
0.335
Raw-SSD
454 bc
0.237
0.094
3.07
0.091
0.330
Digested-B
473 bc
0.242
0.092
3.18
0.093
0.324
Digested-SSD
623 a
0.238
0.083
3.45
0.091
0.322
May 2010
Control
610 a
0.243 b
0.071 abc
4.18 ab
0.115 ab
0.328 b
Urea
333 b
0.215 c
0.074 ab
3.48 c
0.101 b
0.322 b
Raw-B
401 a
0.266 ab
0.084 a
4.04 bc
0.116 ab
0.357 ab
Raw-SSD
297 b
0.268 a
0.066 bc
4.91 a
0.127 a
0.414 a
Digested-B
258 b
0.259 ab
0.071 abc
4.65 ab
0.123 a
0.398 a
Digested-SSD
279 b
0.267 ab
0.066 c
4.97 a
0.125 a
0.406 a
April 2011
Control
512
0.221 b
0.087 ab
3.11 d
0.082 c
0.341 b
Urea
447
0.250 a
0.078 c
3.96 a
0.094 ab
0.380 a
Raw-B
489
0.257 a
0.093 ab
3.35 bcd
0.092 b
0.335 b
Raw-SSD
428
0.253 a
0.095 a
3.25 cd
0.100 ab
0.345 b
Digested-B
441
0.258 a
0.085 bc
3.68 ab
0.101 ab
0.357 ab
Digested-SSD
491
0.255 a
0.085bc
3.61 abc
0.102 a
0.359 ab
Letters within a column within a year indicate significant differences at . No letters indicate no significant differences within that column.
aMole percent = (mole substance in a mixture)/(mole mixture) %.
