North Dakota State University * Dickinson Research Extension Center
1089 State Avenue, Dickinson, ND 58601-4642 Voice: (701) 483-2348 FAX: (701) 483-2005
HOGS Winter 1959-60 Feeding Trial
Three lots of 48-pound pigs and 3 lots of 62-pound pigs were paired and fed 3 meal-type rations as follows:
|Commercial Supp.||Soybean Meal||Dry B. Milk|
|Trace Min. Salt||0||10||10|
|Table 13. Three rations for fattening pigs, Winter 1959-1960|
|Dry Buttermilk||Soybean Meal||Commercial|
|Lot 1||Lot 4||Lot 2||Lot 5||Lot 3||Lot 6|
|Av. Daily Gain||1.30||1.45||1.24||1.36||1.28||1.34|
|Days on Feed||105||105||105||105||15||105|
|Feed/100 Lb. Gain||421||443||463||462||458||510|
|Feed Cost/100 Gain||$10.53||$11.08||$9.58||$9.56||$9.89||$11.02|
|Feed prices used: Barley, .80 bu., Oats, .56 bu., Soybean Meal, $4.00 Cwt., Dry Buttermilk, $9.00 Cwt., Steamed Bonemeal, $6.00 Cwt., Trace Min. Salt, $2.75 Cwt., and Commercial Supp., $8.00 Cwt. A fee of 15 cents per Cwt. was added for grinding and mixing.|
Gains were highest on the ration containing 8% dry buttermilk, but the simple soybean meal supplement was the most economical in producing pork. All top hogs in the six lots sold together for $13.60 per 100 pounds.
A later experiment with 4 lots of pigs on concrete compared a soybean meal ration similar to that fed lots 2 and 5 above, with a ration containing 3% each of soybean meal and dry buttermilk. Table 14 presents the results obtained with these two rations, both pelleted.
|Table 14. Soybean Meal vs. Soybean Meal and Buttermilk Supplements|
|5% Soybean Meal||3% Each, Soybean Meal & Buttermilk|
|Av. Daily Gain||1.23||.95||1.39||1.18|
|Days on Feed||111||147||111||133|
|Feed/100 Lbs. Gain||376||379||356||334|
|Feed Cost/100 Gain||$8.91||$8.98||$9.08||$8.52|
The soybean meal and buttermilk supplement was superior to soybean meal alone for both the 27-pound and the 56-pound pigs; with the greatest difference showing in the light weight pigs. While the soybean meal supplemented ration appeared to give satisfactory results in 56-pound pigs, it was inferior to a ration containing both soybean meal and buttermilk when fed to 27-pound pigs.
Limited-fed vs. Self-fed Fattening Pigs, 2 rations
Experimental evidence presented by workers in the United States Department of Agriculture has shown that pigs on good pasture will make more economical gains when fed only about two-thirds as much feed per day as they would eat if self-fed. Also claimed for limited feeding is the production of leaner pork, which is desirable from the consumer's viewpoint.
An experiment, using 2 rations and 4 lots of pigs on pasture and 2 lots on concrete, was conducted in the summer of 1960 to learn whether limited feeding would pay under our conditions.
The same ration as that used for lots 3 and 6, Table 13, was self-fed and hand-fed both on pasture and on concrete. A second ration containing the same grain mixture, but no supplement other than .5% of trace-mineralized salt was self-fed and hand-fed on pasture. The pastures were spring seeded winter wheat, and all rations were pelleted. Results are summarized in Table 15.
|Table 15. Limited-fed and Self-fed Pigs on Pasture and on Concrete|
|Complete Ration||Grain & Salt Only|
|Lot 1 Hand||Lot 2 Self||Lot 3 Hand||Lot 4 Self||Lot 2-p Hand||Lot 3-p Self|
|Av. D. Gain||.98||1.10||1.02||1.40||1.09||1.28|
|Days on Feed||147||147||147||133||147||133|
|Feed Consumed/100 Gain||355||395||333||344||331||359|
|Feed Cost/100 Gain||$8.66||$9.64||$8.13||$8.39||$7.25||$7.86|
The hand-fed pigs made more economical but less rapid gains than the self-fed pigs in each of the three comparisons. The hand-fed pigs on concrete were fed an average 80% as much feed as their self-fed mates. The cost of gains was $.98 per 100 pounds higher for the self-fed pigs than for the hand-fed pigs, but this large difference may be partially due to the fact that several pigs in self-fed lot 2 were poor doers. The hand-fed pigs in lot 3 were fed 72% as much feed per day as the sel-fed pigs in lot 4 consumed.
There was a much greater difference in rate of gain between hand-feeding and self-feeding on pasture than on concrete. The most economical gains were made by pigs in Lots 2-p and 3-p, which were fed only grain and salt. The hand-feds consumed 78% as much feed per day as the self-feds, and as in all other comparisons, made more efficient gains than the self-feds. No carcass data were secured on the pigs in these lots.
The relatively good showing made by the pigs on a grain and salt ration in Table 15 is in agreement with the findings of an earlier trial with fall pigs. In that trial, the self-fed complete ration pigs gained 1.28 pounds per day and the grain and salt-fed pigs gained 1.16 pound per day. The latter lot put on weight for $1.45 per 100 pounds less feed cost than the former.