Effects of and interactions between the extent of silage fermentation and protein supplementation in lactating dairy cows

被引:18
作者
Heikkilä, T [1 ]
Toivonen, V [1 ]
Huhtanen, P [1 ]
机构
[1] Agr Res Ctr Finland, Inst Anim Prod, FIN-31600 Jokioinen, Finland
来源
AGRICULTURAL AND FOOD SCIENCE IN FINLAND | 1998年 / 7卷 / 03期
关键词
bacterial inoculant; digestibility; fish meal; formic acid; milk composition; milk production; silage intake; wilted silage;
D O I
10.23986/afsci.72865
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
Twelve Ayrshire cows were used to study the effects of and interactions between extent of silage fermentation and level of protein supplementation on silage intake and milk production. Experimental design was a cyclic change-over with six dietary treatments, with two replicate blocks of six cows and four 3-week periods. Dietary treatments in a 2 x 3 factorial arrangement consisted of two wilted silages treated with either a formic acid-based (FA) 5 l/t or a bacterial inoculant additive (I) and three levels of protein supplementation obtained by fish meal (FM) inclusion (0, 60 and 120 g/kg concentrate). Grass silage was given ad libitum and concentrates were offered at a rate of 10 kg/d. Both silages were well-preserved but I-silage was more extensively fermented than FA-silage. Feeding FA-silage decreased diet organic matter digestibility, particularly that of neutral detergent fibre, compared with I-silage. Inclusion of FM increased the digestibility of all dietary constituents. Dry matter (DM) intake of I-silage was lower than that of FA-silage but milk yield was not significantly affected. Restricting silage fermentation increased milk fat content, fat yield and energy corrected milk yield. FM inclusion increased silage DM intake, milk yield, milk protein content and yield. FM(120) inclusion increased milk fat yield more with FA-silage than with I-silage, whereas the response in milk protein yield was greater with I-silage. plasma glucose, plasma urea and milk urea concentrations were lower and blood beta-hydroxybutyrate higher in cows given FA-diets than those given I-diets.
引用
收藏
页码:329 / 343
页数:15
相关论文
共 50 条
[1]   PERFORMANCE OF LACTATING DAIRY-COWS FED EITHER ALFALFA SILAGE OR ALFALFA HAY AS THE SOLE FORAGE [J].
BRODERICK, GA .
JOURNAL OF DAIRY SCIENCE, 1995, 78 (02) :320-329
[2]  
BRODERICK GA, 1992, J DAIRY SCI, V75, P174, DOI 10.3168/jds.S0022-0302(92)77751-0
[3]  
Chamberlain D. G., 1989, Recent advances in animal nutrition - 1989., P175
[4]  
CHAMBERLAIN DG, 1987, PROCESS BIOCHEM, V22, P60
[5]   EFFECTS OF THE TYPE OF ADDITIVE AND THE TYPE OF SUPPLEMENT ON THE UTILIZATION OF GRASS-SILAGE FOR MILK-PRODUCTION IN DAIRY-COWS [J].
CHAMBERLAIN, DG ;
MARTIN, PA ;
ROBERTSON, S ;
HUNTER, EA .
GRASS AND FORAGE SCIENCE, 1992, 47 (04) :391-399
[6]   THE EFFECTS OF THE RATE OF ADDITION OF FORMIC-ACID AND SULFURIC-ACID ON THE ENSILAGE OF PERENNIAL RYEGRASS IN LABORATORY SILOS [J].
CHAMBERLAIN, DG ;
QUIG, J .
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE, 1987, 38 (03) :217-228
[7]  
CHAMBERLAIN DG, 1993, SILAGE RES 1993, P131
[8]   THE EFFECT OF THE ADDITION OF CELL-WALL DEGRADING ENZYMES AT ENSILING ON THE RESPONSE TO POSTRUMINAL SUPPLEMENTATION OF PROTEIN IN DAIRY-COWS RECEIVING A SILAGE-BASED DIET [J].
CHOUNG, JJ ;
CHAMBERLAIN, DG .
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE, 1992, 60 (04) :525-527
[9]   EFFECTS OF ADDITION OF LACTIC-ACID AND POST-RUMINAL SUPPLEMENTATION WITH CASEIN ON THE NUTRITIONAL-VALUE OF GRASS-SILAGE FOR MILK-PRODUCTION IN DAIRY-COWS [J].
CHOUNG, JJ ;
CHAMBERLAIN, DG .
GRASS AND FORAGE SCIENCE, 1993, 48 (04) :380-386
[10]  
DAVIS AW, 1969, BIOMETRIKA, V56, P283, DOI 10.2307/2334421