EVALUATION OF PHYSICAL STRUCTURE .2. MAIZE SILAGE

被引:43
作者
DEBOEVER, JL
DEBRABANDER, DL
DESMET, AM
VANACKER, JM
BOUCQUE, CV
机构
[1] National Institute for Animal Nutrition, Melle-Gontrode
关键词
D O I
10.3168/jds.S0022-0302(93)77496-2
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
Physical structure of 14 maize silages was investigated; chewing activity was measured with eight cows over 4 d. Silages were harvested from the milk dough dent to the hard dough dent stages of maturity and chopped at lengths of 4 to 16 mm. Silages were fed for ad libitum intake and were supplemented with 2 kg of soybean meal. Eating, ruminating, and total chewing indexes varied from 16.5 to 25.3, 34.3 to 50.2, and 50.8 to 75.5 min/kg of silage DMI, respectively. Ruminating and total chewing indexes decreased as maturity stage increased. Eating index was not significantly affected by chopping to 4 to 8 mm lengths but was higher for the 16-mm maize. Ruminating index was higher with 8-mm than with 4-mm maize, but coarser chopping had no additional effect. Thus, total chewing index increased continuously as chopping length increased from 4 to 16 mm. Chemical (DM, crude fiber, NDF, ADF, lignin, and starch) and physical parameters (particle size, milling resistance, and density) and in vitro digestibility were used to derive equations to predict ruminating and total chewing indexes. In vitro digestibility and the fraction of vegetative plant particles retained on a 2.38-mm sieve were the main determinants of both chewing indexes.
引用
收藏
页码:1624 / 1634
页数:11
相关论文
共 32 条
[1]  
AERTS JV, 1981, REV AGR-BRUSSELS, V34, P1231
[3]  
CAMMELL SB, 1972, P NUTR SOC, V31, P63
[4]   CHEWING ACTIVITY OF RUMINANTS AS A MEASURE OF PHYSICAL STRUCTURE - A REVIEW OF FACTORS AFFECTING IT [J].
DEBOEVER, JL ;
ANDRIES, JI ;
DEBRABANDER, DL ;
COTTYN, BG ;
BUYSSE, FX .
ANIMAL FEED SCIENCE AND TECHNOLOGY, 1990, 27 (04) :281-291
[5]   EVALUATION OF PHYSICAL STRUCTURE .1. GRASS-SILAGE [J].
DEBOEVER, JL ;
DESMET, A ;
DEBRABANDER, DL ;
BOUCQUE, CV .
JOURNAL OF DAIRY SCIENCE, 1993, 76 (01) :140-153
[6]  
DEBOEVER JL, 1983, REV AGR-BRUSSELS, V36, P263
[7]  
DEBOEVER JL, 1991, THESIS U GHENT GHENT
[8]  
DEBRABANDER DL, 1990, PRAKT TIERARZT, V2, P10
[9]  
DEBRABANDER DL, 1990, P C BR MAIZE GROWERS
[10]   INTERRELATIONSHIPS AMONG VOLUNTARY INTAKE, EATING AND RUMINATING BEHAVIOR AND RUMINAL MOTILITY OF HEIFERS FED CORN-SILAGE [J].
DESWYSEN, AG ;
ELLIS, WC ;
POND, KR .
JOURNAL OF ANIMAL SCIENCE, 1987, 64 (03) :835-841