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- Title
Comparison of swine manure composition using multiple manure sampling methods.
- Authors
Sholly, D. M.; Hinson, R. B.; Saddoris, K. L.; Walsh, M. C.; Kelly, D. T.; Richert, B. T.; Sutton, A. L.; Radcliffe, J. S.
- Abstract
Sixteen manure pits (30 pigs/pit) were sampled monthly during a wean-finish trial (22 wks) to compare the effects of sampling method on estimates of manure DM and ash. Eight pits were emptied monthly in a pull plug/recharge (PP) system, and 8 were kept as a deep pit (DP) system. Manure pits were sampled using: 1) mechanical core sampler (Coswala); 2) vacuum core sampler (vacuum); 3) cup sampler; and 4) agitated slurrystore sample (control, CTL). For core sampling, manure was obtained from 12 locations/pit and pooled. Cup samples were taken from 6 locations/pit and pooled. All data were analyzed using the GLM procedure of SAS. Within the PP system (40 obs/method), manure DM was 14.8% higher (P<0.05) for vacuum samples compared to CTL samples, while DM was 30.3 and 44.5% lower (P<0.05) for Coswala and cup samples, respectively, compared to CTL samples. Manure ash content was 12.5% higher (P<0.10) for vacuum samples and 19.8% lower (P<0.05) for cup samples compared to CTL samples. Ash content of Coswala samples was 10.4% less than CTL samples, although statistically similar. Within the DP system (wk 22, 8 obs/method), manure DM was 28.6% lower (P<0.10) for cup samples compared to CTL samples. Manure DM was 7.7% higher for vacuum samples and 16.7% lower for Coswala samples compared to CTL samples, but neither were statistically different from the CTL. Numerically, DP system manure ash followed the same pattern, but no significant differences (P>0.10) were observed among sampling methods. From wk 8-22, manure DM from Coswala and cup samples increased from 53 to 79% and 47 to 71%, respectively, relative to vacuum samples in the DP system. Relative estimates of manure ash followed a similar pattern, although initial estimates were closer (67%) to vacuum samples. Outcomes of this trial demonstrate that manure sampling method can significantly influence manure composition, potentially impacting land application.
- Subjects
SWINE manure; MANURES; SAMPLING methods; DRILL core analysis
- Publication
Journal of Animal Science, 2006, Vol 84, p258
- ISSN
0021-8812
- Publication type
Article