干旱区生态环境知识资源中心(Arid): Meta-analysis of spineless cactus feeding to meat lambs: performance and development of mathematical models to predict dry matter intake and average daily gain

Arid

DOI	10.1017/S1751731119000326
	Meta-analysis of spineless cactus feeding to meat lambs: performance and development of mathematical models to predict dry matter intake and average daily gain
	Knupp, L. S.1; Carvalho, F. F. R.2; Cannas, A.3; Marcondes, M., I 4; Silva, A. L.4,5; Francesconi, A. H. D.3; Beltrao da Cruz, G. R.1; Atzori, A. S.3; Gaspa, G.3; Costa, R. G.1
通讯作者	Costa, R. G.
来源期刊	ANIMAL
ISSN	1751-7311
EISSN	1751-732X
出版年	2019
卷号	13 期号:10 页码:2260-2267
英文摘要	Spineless cactus is a useful feed for various animal species in arid and semiarid regions due to its adaptability to dry and harsh soil, high efficiency of water use and carbohydrates storage. This meta-analysis was carried out to assess the effect of spineless cactus on animal performance, and develop and evaluate equations to predict dry matter intake (DMI) and average daily gain (ADG) in meat lambs. Equations for predicting DMI and ADG as a function of animal and diet characteristics were developed using data from eight experiments. The dataset was comprised of 40 treatment means from 289 meat lambs, in which cactus was included from 0 to 75% of the diet dry matter (DM). Accuracy and precision were evaluated by cross-validation using the mean square error of prediction (MSEP), which was decomposed into mean bias, systematic bias and random error; concordance correlation coefficient, which was decomposed into accuracy (C-b) and precision (rho); and coefficient of determination (R-2). In addition, the data set was used to evaluate the predicting accuracy and precision of the main lamb feeding systems (Agricultural and Food Research Council, Small Ruminant Nutritional System, National Research Council and Institut National de la Recherche Agronomique) and also two Brazilian studies. The DMI, CP intake (CPI), metabolizable energy (ME) intake and ADG increased when cactus was included up to 499 g/kg DM (P<0.001). In contrast, animals fed high levels of cactus (>500 g/kg DM) had a decreased DMI, CPI and NDF intake, but increased feed efficiency (P<0.001) and similar ADG compared with those without cactus addition. The DMI was positively correlated with initial BW, final BW, concentrate and ADG, while it was negatively correlated with cactus inclusion and ME of the diet. On other hand, ADG was positively correlated with DMI, initial and mean BW and concentrate, and it was negatively correlated with cactus inclusion. The two developed equations had high accuracy (C-b of 0.95 for DMI and 0.94 for ADG) and the random error of MSEP was 99% for both equations. The precision of both equations was moderate, with R-2 values of 0.53 and 0.50 and rho values of 0.73 and 0.71 for DMI and ADG, respectively. In conclusion, the developed equation to predict DMI had moderate precision and high accuracy, nonetheless, it was more efficient than those reported in the literature. The proposed equations can be a useful alternative to estimate intake and performance of lambs fed cactus.
英文关键词	nutrition models nutritional requirements Opuntia ficus-indica semiarid sheep
类型	Article
语种	英语
国家	Brazil ; Italy
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000487064700020
WOS关键词	INDICA L. MILLER ; CHEMICAL-COMPOSITION ; DIGESTIBILITY ; REQUIREMENTS ; REPLACEMENT ; MULTIPLE ; LEVEL ; GOATS ; SHEEP ; CORN
WOS类目	Agriculture, Dairy & Animal Science ; Veterinary Sciences
WOS研究方向	Agriculture ; Veterinary Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214156
作者单位	1.Univ Fed Paraiba, Dept Zootecnia, Rodovia BR 079 Km 12, BR-58397000 Areia, Paraiba, Brazil; 2.Univ Fed Rural Pernambuco, Dept Zootecnia, Rua Dom Manoel de Medeiros S-N, BR-52171900 Recife, PE, Brazil; 3.Univ Sassari, Sez Sci Zootecn, Dipartimento Agr, Via Nicola 9, I-07100 Sassari, Italy; 4.Univ Fed Vicosa, Dept Zootecnia, Ave PH Rolfs S-N, BR-36570900 Vicosa, MG, Brazil; 5.Univ Fed Rural Rio de Janeiro, Inst Anim Sci, Dept Anim Prod, BR-23897005 Seropedica, RJ, Brazil
推荐引用方式 GB/T 7714	Knupp, L. S.,Carvalho, F. F. R.,Cannas, A.,et al. Meta-analysis of spineless cactus feeding to meat lambs: performance and development of mathematical models to predict dry matter intake and average daily gain[J],2019,13(10):2260-2267.
APA	Knupp, L. S..,Carvalho, F. F. R..,Cannas, A..,Marcondes, M., I.,Silva, A. L..,...&Costa, R. G..(2019).Meta-analysis of spineless cactus feeding to meat lambs: performance and development of mathematical models to predict dry matter intake and average daily gain.ANIMAL,13(10),2260-2267.
MLA	Knupp, L. S.,et al."Meta-analysis of spineless cactus feeding to meat lambs: performance and development of mathematical models to predict dry matter intake and average daily gain".ANIMAL 13.10(2019):2260-2267.