Influence of Oral Administration of Salix Babylonica Extract on Milk Production and Composition in Dairy Cows

Figures & data

Table 1. Ingredients and chemical composition of the concentrate mixture and oat hay and secondary metabolites of Salix babylonica extract.

	Concentrate	Oat hay
Ingredients, g/kg
Corn grain, flaked	200
Corn grain, cracked	260
Sorghum, grain	154
Molasses, sugar cane	100
Dried distillers grains with solubles	100
Soya bean, meal	96
Wheat, bran	70
NaCO3	10
Mineral mix^°	10
Chemical composition, g/kg
Organic matter	920±3.1	922±4.3
Crude protein	157±1.1	80±2.1
Ether extract	120±1.6	nd
Neutral detergent fibre	160±2.2	661±3.1
Acid detergent fibre	28±0.9	417±2.8
Secondary compounds in S. Babylonica extract, g/kg
Total phenolics		13±0.8
Saponins		4.8±0.5
Aqueous fraction^#		73±2.2

°Mineral and vitamin mixture: Ca, 190 g/d; P, 115 g/d; Mg, 63 g/d; Cl,167 g/d; K, 380 g/d; Na, 70 g/d; S, 53 g/d; Co, 3.3 mg/d; Cu, 197 mg/d; Fe, 360 mg/d; Mn, 900 mg/d; Se, 2 mg/d; Zn, 810 mg/d; Vit. A, 940 mg (1000 U/d); Vit. D, 165 mg (1000 U/d); Vit. E, 374 mg (1000 U/d).

^#Aqueous fraction (lectins, polypeptides, starch; Cowan, 1999). nd, not determined.

Table 2. Milk production and composition in dairy cows supplemented with different doses of Salix babylonica extract.

	Doses of S. babylonica, mL/cow/d
	SB0	SB150	SB300	SEM	P linear
Intake, kg/d
Total DM	17.8	18.9	17.5	1.35	0.062
Oat hay	12.9^b	14.4^a	13.0^a	1.12	0.041
Water	77. 6	81.4	78.3	4.70	0.058
Milk
Production, kg/d	11.2	12.7	12.2	1.02	0.061
Energy, MJ/kg	34.6	33.6	34.0	1.57	0.064
Milk composition, %
Fat	4.9^a	4.8^b	4.7b	0.25	0.049
Protein	4.5	4.3	4.5	0.23	0.723
Lactose	3.1	3.0	3.2	0.18	0.768
Milk component yield, kg/d
Fat	0.55	0.58	0.57	0.033	0.063
Protein	0.50	0.53	0.55	0.030	0.408
Lactose	0.35	0.37	0.39	0.028	0.062
kg DMI/kg milk	1.59^a	1.55^b	1.35^b	0.210	0.042

SB, Salix babylonica; DM, dry matter; DMI, dry matter intake.

^a,bDifferent superscripts following means in the same row indicate differences at P<0.05.

Table 3. In vitro gas production parameters and after 24 and 72 h of incubation as well as dry matter degradability of the concentrate and oat hay (1:1, w/w) with different doses of S. babylonica extract.

Doses of S. babylonica, mL/cow/d
	0	0.6	1.2	1.8	SEM	P linear
b, mL/g DM	127^c	209^b	278^ab	299^a	11.8	0.011
c, /h	0.060	0.069	0.051	0.044	0.0036	0.213
L, h	2.14	1.1	1.09	0.76	0.587	0.565
GP24, mL/g DM	100^d	131^c	167^a	144^b	11.1	0.034
GP72, mL/g DM	125^c	199^b	257^a	271^a	11.0	0.012
DM degradability, mg/g DM	671^b	685^b	713^a	725^a	19.4	0.025

b, asymptotic gas production (mL/g DM); c, rate of gas production (/h); L, initial delay before gas production begins (h).

^a-dDifferent superscripts following means in the same row indicate differences at P<0.05.

Cowan M.M.,1999. Plant products as antimicrobial agents. Clin. Microbiol. Rev. 12 :564-582.

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