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Study on Behaviour of Sows Before and After farrowing in Farrowing crates and Farrowing pens

Author: DengHongYu
Tutor: BaoJun
School: Northeast Agricultural University
Course: Animal Nutrition and Feed Science
Keywords: Sow Behavior Limit column Childbirth circle
CLC: S828
Type: Master's thesis
Year: 2001
Downloads: 122
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Abstract

The litter size limit bar farrowing system is more popular in the world, is designed for to prevent the sow extrusion piglets to improve the survival rate of piglets, the system piglet mortality decreased from 32% to 14%. Therefore, the delivery system from the sixties of this century became popular. Brembell Committee clearly states: at least meet the animals have enough turned modification, stand up, freedom of movement, lying and stretch your legs. Therefore, countries scholars have improved maternity pens structure, and proposed various improved scheme have oval, circular, ellipsoid, the swirling-type and ground inclined, mainly by the behavior observed sows to evaluate a variety of rationality of the design. In many studies, the head of the sow lying posture toward the switching frequency of the behavior during pregnancy and lactation has not been reported. The main purpose of this study: 1) compare farrowing the limit column childbirth fences system affect the activities of sow behavior; 2) compare sow converted in the the two childbirth bar changes in posture and gesture, as well as their behavior the impact. Through two trials in sows limit bar and childbirth ring prenatal, postpartum, lying position, lying posture, head orientation and posture conversion frequency. Test (a), 10 bar Large White sows reared in the limit as the research object, 2 Zhou Ping Yang, 1-2 weeks of their pregnancy (captive), lactating (five weeks at the stop bar ) and empty cup period (2 weeks rearing) behavior observed for a period of 10 weeks. High bed limit bar area of ??1.5 × 2.3m, gestation homes rearing Scotia (3.5 x 4m), the ground is a concrete floor, there is a slight slope, discharge zones and water areas in the downhill side of the manger uphill on one side, surrounded by railings. Experimental observation time from March 10 to May 30 from 2000, the test site Daqing pig farm. The observed transient recording method, each observation interval of 5 minutes. Record vertical and horizontal, lateral posture conversion frequency and head toward the behavioral parameters. The test results show that the lactation stage in the limit bar Large White sows on the front of the cage and the next cage side with 59% and 64.8%, respectively, the head outwards were 49.08% and 52.60%. On the cage, large white 61.69 percent the the sows side with the stage of pregnancy, lactation stage, 65.90%, and increase breastfeeding week-old the sows side with. Lactation sows posture conversion frequency of 1.83 times / hour. Large White sows and 10 Landrace sow rearing circle 10 trials (b) as the observed object, its 10-week gestation period (four weeks before the expected date of birth) and lactation (6 weeks) behavioral observations. Sow for the plane in captivity, sheds length × width × 3 × 3.1 × 0.95m high cement floor, circle pig bed area of ??2.4 × 2.2m circle also has a piglet incubator (length × width × height 1.05 × 0.6 × 0.95m), the top of the incubator infrared lamp supply heat source. Experimental observation time on October 16, 2000 to 2001 20 trial sites rely pig farm Hezhai. The observed transient recording method, each observation interval of 5 minutes. Record vertical and horizontal, side, the posture switching frequency, head orientation and position, lying behavior parameters. The test results show that the childbirth circle in white lying lying with sows in the feeding area (0) were 1.15%: the stage of pregnancy, lactation stage, 3.14%; Landrace sows lying in the feeding area (0) lying with: the stage of pregnancy and lactation phases are 0. Large White sows side with 70.3%: the stage of pregnancy, lactation stage, 71.43%; Deng Hongyu Abstract 20 (). 5 Landrace side with as were 70%: the stage of pregnancy, lactation stage, 82.14%. Large White sows head outwards with were: the stage of pregnancy was 53.38%, lactation stage 41 factory 4%; Landrace sows head outwards: 75.86% pregnancy stage, the breastfeeding stage for 54. 84 percent. The conversion frequency of the posture of the sows in the childbirth circle 4 knife 5 times / hour. Conclusion: l childbirth Circle sows almost not feeding area, lying. 2. Sows in childbirth circle using the the head outwards posture than posture toward the other. 3. Limit bar and childbirth circle sows significantly more vertical and horizontal lateral posture. 4. Childbirth circle sow posture conversion frequency was significantly high sub-limit column sow posture conversion frequency.

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CLC: > Agricultural Sciences > Livestock, animal medicine,hunting,silkworm,bee > Livestock > Pig
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