Animal Nutrition Institute, Sinochem Yunlong Co.,Ltd,

Innovation and Practical Training Center, National Pingtung University of Science and Technology

Taiwan Glory Enterprise Co., Ltd

 

Objective

The study was conducted to examine the effect of MDCP from different manufacturers and DCP on growth performance and nutrient utilization of broiler chickens.

Materials and Methods

Animals and Design

A total of 288 1-day-old AA broiler chickens were randomly assigned to 4 groups with 12 replicates of 6 each (Table 1). 

Table 1 Experiment Design

 

Groups	P Source	Manufacturers
Group 1	MDCP（P 21%）	Chinese manufacturer
Group 2	MDCP（P21%）	American manufacturer1
Group 3	MDCP（P21%）	American manufacturer 2
Group 4	DCP（P18%）	Chinese manufacturer

 

Experiment Diets

The composition and nutrient levels of diets were in Table 2.  

Table 2 Composition and nutrient levels of diets (air dry basis) %

 

Items	Content
	Group 1	Group 2	Group 3	Group 4
Ingredients Corn Soybean flour Vegetable oil Limestone Methionine NaCl Mineral Premix Vitamin Premix MDCP(Chinese ) MDCP(American 1) MDCP(American 2) DCP(Chinese ) Total	51.2 43.5 1.0 1.5 0.6 0.3 0.1 0.1 1.7 100	51.1 43.5 1.0 1.6 0.6 0.3 0.1 0.1 1.7 100	51.0 43.6 1.0 1.6 0.6 0.3 0.1 0.1 1.7 100	51.2 43.5 1.0 1.2 0.6 0.3 0.1 0.1 2.0 100
Nutrient levels CP/% ME/(kcal/kg) Ca/% AP/%	23 3200 1.05 0.45	23 3200 1.05 0.45	23 3200 1.05 0.45	23 3200 1.05 0.45

 

Housing and Management

The trial was conducted in Taiwan NPUST coop farm. Artificial lighting was used to provide chicks with 24 hours lighting daily during the whole experimental period. The relative humidity was maintained the at 55-65％. Initial brooding temperature was 33 ℃ in the first week of age and reduced gradually to room temperature after two weeks. Diets and water were provided ad libitum all over the experimental period, which lasted for 42 days of age.

Data to be collected       

Feed intake, weight gain and feed conversion for each cage of birds were calculated weekly. Four for every experimental group were chosen to examine the digestibility coefficients of nutrients of the experimental diets at the end of the experimental period (7 weeks of age).

Statistical analysis 

Data were analyzed with analysis of variance (ANOVA) procedure of statistical analysis system (SAS/SPSS version 10.0 for Windows). When significant difference (P<0.05) were detected the multiple range test was used to separate the mean value.

Results

Comparied with the group of DCP, MDCP groups had a tendency of improving the average daily gains (ADG) and the feed/gain (F/G). The average feed intake (ADFI) of the MDCP (Chinese) group was significant higher than the DCP group. The average daily gain, the F/G and ADFI all were no significant differences among three MDCP groups. The utilization of Ca, P and CP from MDCP (Chinese) group were higher than others. DCP group for iron and copper metabolism were higher than other groups, and the utilization of copper and zinc of MDCP (Chinese) group were higher than other MDCP groups. 

Table3  Effects on ADFI of broiler chickens fed different kinds of phosphorus source （g）

 

Weeks	MDCP Chinese	MDCP American 1	MDCP American 2	DCP18% Chinese	SEM	Significance
1	28.92	27.60	26.88	29.00	1.30	NS
2	54.25	53.60	54.38	52.50	2.15	NS
3	81.92	77.50	81.88	78.00	2.27	NS
4	113.75	108.30	110.75	110.00	3.43	NS
5	134.58	127.00	129.13	133.90	5.58	NS
6	174.75a	143.30 b	159.00ab	160.60ab	8.33	**
1-2	41.58	40.60	40.63	40.75	1.57	NS
3-4	97.83	92.90	96.31	94.00	2.59	NS
5-6	154.67	135.15	144.06	147.25	6.63	NS
1-6	98.03	89.55	93.67	94.00	3.19	NS

 

^{a, b}： In the same row, different small letter superscripts mean significant difference(P<0.05),differ rent capital letter superscripts mean significant difference(P<0.01). The same as below.

Table4  Effects on ADG of broiler chickens fed different kinds of phosphorus source （g）

 

Weeks	MDCP Chinese	MDCP American 1	MDCP American 2	DCP18% Chinese	SEM	Significance
1	18.92	19.60	18.13	18.90	0.94		NS
2	37.00	38.20	37.38	36.10	1.29		NS
3	54.67	50.50	53.88	53.30	1.99		NS
4	60.67	58.70	61.38	57.20	2.59		NS
5	60.33ab	54.00 ab	64.75 a	52.70b	3.72		*
6	56.50	54.33	61.75	52.00	4.32		NS
1-2	27.96	28.90	27.75	27.50	1.00		NS
3-4	57.67	54.60	57.63	55.25	2.15		NS
5-6	54.94	58.42	63.25	52.35	3.73		NS
1-6	48.01	46.74	49.54	45.03	1.93		NS

 

Table 5  Effects on F/G of broiler chickens fed different kinds of phosphorus source

 

Weeks	MDCP Chinese	MDCP American 1	MDCP American 2	DCP18% Chinese	SEM	Significance
1	1.53	1.41	1.53	1.53	0.06		NS
2	1.47	1.40	1.47	1.47	0.06		NS
3	1.50	1.55	1.52	1.48	0.04		NS
4	1.88	1.88	1.82	1.95	0.06		NS
5	2.29ab	2.39ab	2.01a	2.83a	0.22		*
6	3.15ab	2.91ab	2.61b	3.39a	0.24		*
1-2	1.52	1.41	1.52	1.51	0.07		NS
3-4	1.69	1.71	1.67	1.71	0.04		NS
5-6	2.72ab	2.66ab	2.31b	3.11a	0.21		*
1-6	1.98	1.92	1.83	2.11	0.08		NS

 

Table 6  Effects on nutrient utilization of broiler chickens fed different kinds of phosphorus source （%）

 

Nutrients	MDCP Chinese	MDCP American 1	MDCP American 2	DCP18% Chinese	SEM	Significance
P	51.84a	39.79b	47.66ab	49.74a	2.76	*
Ca	55.495a	50.63ab	49.76b	54.468ab	1.47	*
CP	70.71a	65.63b	66.51ab	62.97b	1.37	*
DM	78.14	74.77	77.01	76.20	1.10	NS
Fe	87.67ab	86.64b	88.73ab	89.88a	0.78	*
Mg	40.65a	36.68a	26.45b	37.71a	2.60	*
Mn	19.07ab	23.22ab	30.04a	12.61b	3.42	*
K	46.89a	45.13a	37.06b	41.31ab	1.94	*
Cu	62.86a	32.49b	18.68b	65.17a	4.90	***
Zn	41.53a	27.52b	15.77c	32.09ab	3.39	*

 

Conclusion

Compared with DCP, MDCP can improve the growth performance of chickens, and the MDCP produced by Chinese had the same effect on growth performance of chickens with other products produced by American.