caa a22 4500 386320896 CHVBK 20180307111626.0 cr unu---uuuuu 161130e198808 xx s 000 0 eng 10.1017/S0003356100037041 doi S0003356100037041 pii (NATIONALLICENCE)cambridge-10.1017/S0003356100037041 Effect of varying weight gain during the last trimester of gestation on productivity of beef heifers [Elektronische Daten] An experiment was conducted using medium-sized crossbred beef heifers to study how manipulation of weight gain in late gestation affected production. Forty heifers were fed individually to gain according to one of three regimens for an approximate 90 day period prior to parturition: (1) 1·2 kg gain per head per day for 45 days followed by no gains for 45 days; (2) 0·6 kg gain per head per day for the entire period; (3) no gain for the first 45 days followed by 1·2 kg gain per head per day for the last 45 days. Milk production was measured by weighing of calves before and after suckling at 30, 60, and 150 days post partum. Heifers were weighed, measured for heart girth and hip weight, and visually scored for condition at the start, middle and end of the feeding period to quantify growth and condition changes. Heifers that had a high rate of gain for a short time produced more milk in early lactation than heifers that gained at a slower rate for a longer time pre-partum (P < 0·05). Calf weaning weights and dam reproductive performance were unaffected (P < 0·05) by pre-partum weight gain. It is concluded from these results, that as long as the recommended weight gain is achieved during late gestation, the timing of the weight gain is not critical to sustain productivity. Copyright © British Society of Animal Science 1988 Whittier J. C. University of Nebraska West Central Research and Extension Center, North Platte, NE 69101, USA Clanton D. C. University of Nebraska West Central Research and Extension Center, North Platte, NE 69101, USA Deutscher G. H. University of Nebraska West Central Research and Extension Center, North Platte, NE 69101, USA Animal Production Cambridge University Press 47/1(1988-08), 53-57 0003-3561 47:1<53 1988 47 ASC https://doi.org/10.1017/S0003356100037041 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0003356100037041 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Whittier J. C. University of Nebraska West Central Research and Extension Center, North Platte, NE 69101, USA NATIONALLICENCE 700 1- Clanton D. C. University of Nebraska West Central Research and Extension Center, North Platte, NE 69101, USA NATIONALLICENCE 700 1- Deutscher G. H. University of Nebraska West Central Research and Extension Center, North Platte, NE 69101, USA NATIONALLICENCE 773 0- Animal Production Cambridge University Press 47/1(1988-08), 53-57 0003-3561 47:1<53 1988 47 ASC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge