Effect of acidity of concentrate and level fed on maize silage in Mid Lactation Cows
These were lo crude protein diets which showed little economic benefit over concentrate type either at hi or
lo starch levels.  Concentrates were formulated to be equal energy and protein but varying rumen acid load
Conclusion: At modest concentrate levels on pure maize silage the concentrate type matters little.
to moderately yielding mid - late lactation cows. Feed adequate protein
Maize Silage	29% DM
	24.4% Starch
	54.7 NDF
	7.8% CP	LL	L	ML	LMIX	HMIX	MH	H	HH	SED	Sig.
Concentrates Fed	KG	10	7	7	7	7	7	7	10
Acid Value		15	22	29	29	36	34	43	49
Crude Protein	% Kg DM	20.5	26.5	26.5	26.5	26.5	26.5	26.5	20.5
Maize DM intake	(kg/day)	11.5	13.2	12.9	13.1	13	12.9	12.4	10.1	0.53	***
Total DM Intake		20.3	19.4	19.1	19.3	19.2	19.1	18.6	18.9
Ration Crude Protein		13.3	13.8	13.8	13.8	13.8	13.8	14.0	13.7
Milk yield	Kg	27.2	27.5	25.3	26.6	26.4	26.5	25.5	26.6	0.71	<0.1
Milk fat	%	3.82	3.97	4.3	3.76	4.16	3.87	4.2	3.73	2.21	<0.1
Milk fat	kg	1.04	1.09	1.09	1.00	1.10	1.03	1.07	0.99
Milk protein	%	3.08	3.1	3.23	3.13	3.16	3.18	3.28	3.31	0.44	***
Milk protein	kg	0.84	0.85	0.83	0.83	0.83	0.84	0.84	0.88
Fat & Protein	KG	1.88	1.94	1.92	1.83	1.93	1.87	1.91	1.87
Live-weight change	Kg	0.25	0.04	0.12	0.1		0.18	0.09	0.02	0.07	*
Total Feed per Kg Milk	kg	0.75	0.70	0.75	0.72	0.73	0.72	0.73	0.71
Feeds Fed
Wheat			0.4		1.6	2.9		5.0	7.1
Wheat Feed				3.5
Maize			1.1		0.7	0.3
Sugar Beet				0.5			2.1
Citrus							1.5
Bran		2.0
Apple Pomace		3.0	1.4		0.9	0.5
Molasses		1.0	0.4		0.2	0.1
Lucerne				0.1
Soya				1.2			2.1	0.1	0.2
Sunflower			0.9		0.6	0.3	0.2
Groundnut			1.3		1.5	1.6
Protected Soya/Rape/Sunflower Rape		2.2	0.7	1.1	0.6	0.5	0.6	1.4	2.0
Urea		0.20	0.14	0.13	0.14	0.13	0.13	0.11	0.15
Fat/Oil		1.03	0.39	0.15	0.26	0.13	0.11	0.04	0.05
Limestone		0.22	0.18	0.17	0.21	0.24	0.02	0.21	0.30
Dical		0.14	0.08	0.04	0.08	0.07	0.11	0.08	0.11
Salt		0.18	0.13	0.13	0.13	0.13	0.13	0.08	0.12
Ammonium Chloride		0.04
Min Vits		0.04	0.03	0.03	0.03	0.03	0.03	0.02	0.04
		10	7	7	7	7	7	7	10