干旱区生态环境知识资源中心(Arid): Effects of Zinc Sulfate or Propylene Glycol on Intake, Digestibility, and Forage Selection by Grazing Sheep in a Semi-Arid Region During the Rainy Season

Arid

DOI	10.3390/ani9110867
	Effects of Zinc Sulfate or Propylene Glycol on Intake, Digestibility, and Forage Selection by Grazing Sheep in a Semi-Arid Region During the Rainy Season
	Costa, Helio 1; Saliba, Eloisa 1; Galvani, Diego 2; Bomfim, Marco 2; Lana, Angela Maria 1; Borges, Ana Luiza 1; Landim, Aline 3; Faciola, Antonio 4
通讯作者	Costa, Helio
来源期刊	ANIMALS
ISSN	2076-2615
出版年	2019
卷号	9 期号:11
英文摘要	Simple Summary: Caatinga is an important biome in Brazil's semi-arid region, it is characterized by low precipitation and great plant availability seasonality. In this context, mineral and energy supplementation may improve pasture consumption and nutrient utilization. The objective of this study was to determine intake, nutrient availability, and animal selection of major forage species by sheep supplemented with zinc sulfate or propylene glycol in Caatinga-native pastures during the rainy season. Twenty-four sheep were distributed into three treatments (control, Zn, and propylene glycol supplement) in this 112-day study. There was no effect of treatments on plant selection. However, plant species selected by sheep changed over time. Generally, greater intakes were found in April compared to May. In conclusions, based on the finding of this study, Zn and PG supplementation did not improve sheep nutrient intake when grazing Caatinga-native pasture in the rainy season. Abstract: The objective of this study was to determine intake, nutrient availability, and animal selection of major forage species in sheep supplemented with zinc sulfate or propylene glycol in Caatinga-native pastures during the rainy season. Twenty-four mixed Santa Ines sheep, all non-castrated males, with initial weight of 19.3 +/- 2.52 kg and 4 +/- 0.35 months of age, were distributed in a complete randomized design into three treatments: Control (CT)-concentrate supplemented at 0.7% of body weight; CT + 300 mg of Zn day(-1); CT + 2.5 mL of propylene glycol/kg LW0.75.day(-1). Measurements were done in four periods during the rainy season, with 28 days of interval between each measurement. Differences were observed in the composition of the ruminal extrusa samples from pastures for crude protein (CP) (192 to 131 g kg(-1)), in vitro dry matter digestibility (IVDMD) (537 to 441 g kg(-1)), and in vitro organic matter digestibility (IVOMD) (468 to 359 g kg(-1)) in March and June, respectively. There was no effect for treatments, neither for the treatment x period interaction on organic matter (OM), CP, and fibrous fraction intake (p > 0.05). Organic matter intake (OMI) was, on average 23.9% greater in March compared to June. CP intake decreased monthly (p < 0.05). Fibrous fraction intake was greater in March (p < 0.05), with reductions of 34.8, 33.3, and 39.4% in June, respectively, for neutral detergent fiber (NDF), acid detergent fiber (ADF), and cellulose (CEL) fractions. There was no effect of treatments (p > 0.05) on selection of vegetal species present in the pasture. On the other hand, the proportion between ingested species changed over the experimental period. Greater intakes were found in April compared to May, except for Zizyphus joazeiro intake, which was greater in March (p < 0.05). In conclusion, based on the finding of this study, Zn and propylene glycol (PG) supplementation did not improve sheep nutrient intake when grazing Caatinga-native pasture in the rainy season. Caatinga-native pasture biomass has adequate protein and digestible organic matter levels during early rainy season. Over this period, however, the advanced maturity of the plants and the reduced availability of pasture may result in variations of intake by the animals. In the months of April to June, a reduced energy supply is caused by reduced nutritive values of pastures, which contributes to inefficient protein utilization and reduced feed intake.
英文关键词	Caatinga native pasture forage quality ruminal extrusa sample selectivity tannins
类型	Article
语种	英语
国家	Brazil ; USA
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000502299900013
WOS关键词	SUPPLEMENTATION ; NUTRITION ; TROPICS ; GOATS ; FERMENTATION ; PERFORMANCE ; DIGESTION ; CARCASS
WOS类目	Agriculture, Dairy & Animal Science ; Veterinary Sciences
WOS研究方向	Agriculture ; Veterinary Sciences
EI主题词	2019-11-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310535
作者单位	1.Univ Fed Minas Gerais, Dept Anim Sci, BR-123970 Belo Horizonte, MG, Brazil; 2.Embrapa Goats & Sheep, Estr Sobral Groairas, BR-62010970 Sobral, Brazil; 3.Vale do Acarau State Univ, Dept Anim Sci, BR-62040370 Sobral, CE, Brazil; 4.Univ Florida, Dept Anim Sci, Gainesville, FL 32611 USA
推荐引用方式 GB/T 7714	Costa, Helio,Saliba, Eloisa,Galvani, Diego,et al. Effects of Zinc Sulfate or Propylene Glycol on Intake, Digestibility, and Forage Selection by Grazing Sheep in a Semi-Arid Region During the Rainy Season[J],2019,9(11).
APA	Costa, Helio.,Saliba, Eloisa.,Galvani, Diego.,Bomfim, Marco.,Lana, Angela Maria.,...&Faciola, Antonio.(2019).Effects of Zinc Sulfate or Propylene Glycol on Intake, Digestibility, and Forage Selection by Grazing Sheep in a Semi-Arid Region During the Rainy Season.ANIMALS,9(11).
MLA	Costa, Helio,et al."Effects of Zinc Sulfate or Propylene Glycol on Intake, Digestibility, and Forage Selection by Grazing Sheep in a Semi-Arid Region During the Rainy Season".ANIMALS 9.11(2019).