{"title":"沙漠条件下动物种类和摄食水平对能量和氮平衡的影响","authors":"A. Askar, K. M. A. Rahman, H. Taie, K. Kewan","doi":"10.21608/mjapfp.2020.122557","DOIUrl":null,"url":null,"abstract":"Thirty-two adult dry females, age 4-5 yrs.; Balady goats (n= 16 and average body weight 31.11 ± 1.63 kg) and Barki sheep (n= 16 and average body weight 34.53 ±1.56 kg) were used to study effects of long-term restricted feeding regime on body weight changes and balance of energy and protein. Animals of each species were allocated to two levels of feed intake; control feeding treatment (CON) where animals were fed a diet at a level of feeding to meet approximately the metabolizable energy for maintenance requirement (MEm), while those on the other dietary treatment was fed almost 50% of these quantities on a BW basis, termed as the restricted treatment (restricted; RES). Alfalfa hay and concentrate feed mixture (50:50% as DM basis) were given based on requirement recommendations. The results could be summarized as follows: The ADG was not affected (P<0.05) by animal species (BG vs. SH), however, it was affected (P<0.01) by feed intake level where the RES animal group showed a negative ADG (-65.6 g/d) compared with the CON group that achieved positive ADG (36.4 g/d). Both of SH and BG had similar negative energy balance (EB) values (67.0 vs. 61.4 KJ/ kg 0.75 /d, for BG and SH respectively). Nitrogen balance (NB) was greater (P<0.01) for SH (107.64 mg/kg 0.75 /d ) vs. BG (89.47 mg/kg 0.75 /d) and was greater (P<0.01) for animals fed on CON intake (251.47 vs. 208.55 mg/kg 0.75 /d, respectively) than those fed on RES intake (-36.18 vs. -29.62 mg/kg 0.75 /d, respectively), which gave a negative NB. It could be concluded that with desert conditions, sheep may have an advantage in a decreasing Metabolizable energy for maintenance (MEm) requirement and reduction in heat production of a magnitude adequate to maintain body weight. There is a similar rate of using the energy between sheep and goats with moderate or limited nutrition planes.","PeriodicalId":355358,"journal":{"name":"Menoufia Journal of Animal Poultry and Fish Production","volume":"27 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"ENERGY AND NITROGEN BALANCES AS AFFECTED BY ANIMAL SPECIES AND INTAKE LEVEL UNDER DESERT CONDITIONS\",\"authors\":\"A. Askar, K. M. A. Rahman, H. Taie, K. Kewan\",\"doi\":\"10.21608/mjapfp.2020.122557\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Thirty-two adult dry females, age 4-5 yrs.; Balady goats (n= 16 and average body weight 31.11 ± 1.63 kg) and Barki sheep (n= 16 and average body weight 34.53 ±1.56 kg) were used to study effects of long-term restricted feeding regime on body weight changes and balance of energy and protein. Animals of each species were allocated to two levels of feed intake; control feeding treatment (CON) where animals were fed a diet at a level of feeding to meet approximately the metabolizable energy for maintenance requirement (MEm), while those on the other dietary treatment was fed almost 50% of these quantities on a BW basis, termed as the restricted treatment (restricted; RES). Alfalfa hay and concentrate feed mixture (50:50% as DM basis) were given based on requirement recommendations. The results could be summarized as follows: The ADG was not affected (P<0.05) by animal species (BG vs. SH), however, it was affected (P<0.01) by feed intake level where the RES animal group showed a negative ADG (-65.6 g/d) compared with the CON group that achieved positive ADG (36.4 g/d). Both of SH and BG had similar negative energy balance (EB) values (67.0 vs. 61.4 KJ/ kg 0.75 /d, for BG and SH respectively). Nitrogen balance (NB) was greater (P<0.01) for SH (107.64 mg/kg 0.75 /d ) vs. BG (89.47 mg/kg 0.75 /d) and was greater (P<0.01) for animals fed on CON intake (251.47 vs. 208.55 mg/kg 0.75 /d, respectively) than those fed on RES intake (-36.18 vs. -29.62 mg/kg 0.75 /d, respectively), which gave a negative NB. It could be concluded that with desert conditions, sheep may have an advantage in a decreasing Metabolizable energy for maintenance (MEm) requirement and reduction in heat production of a magnitude adequate to maintain body weight. There is a similar rate of using the energy between sheep and goats with moderate or limited nutrition planes.\",\"PeriodicalId\":355358,\"journal\":{\"name\":\"Menoufia Journal of Animal Poultry and Fish Production\",\"volume\":\"27 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2020-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Menoufia Journal of Animal Poultry and Fish Production\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.21608/mjapfp.2020.122557\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Menoufia Journal of Animal Poultry and Fish Production","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.21608/mjapfp.2020.122557","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
ENERGY AND NITROGEN BALANCES AS AFFECTED BY ANIMAL SPECIES AND INTAKE LEVEL UNDER DESERT CONDITIONS
Thirty-two adult dry females, age 4-5 yrs.; Balady goats (n= 16 and average body weight 31.11 ± 1.63 kg) and Barki sheep (n= 16 and average body weight 34.53 ±1.56 kg) were used to study effects of long-term restricted feeding regime on body weight changes and balance of energy and protein. Animals of each species were allocated to two levels of feed intake; control feeding treatment (CON) where animals were fed a diet at a level of feeding to meet approximately the metabolizable energy for maintenance requirement (MEm), while those on the other dietary treatment was fed almost 50% of these quantities on a BW basis, termed as the restricted treatment (restricted; RES). Alfalfa hay and concentrate feed mixture (50:50% as DM basis) were given based on requirement recommendations. The results could be summarized as follows: The ADG was not affected (P<0.05) by animal species (BG vs. SH), however, it was affected (P<0.01) by feed intake level where the RES animal group showed a negative ADG (-65.6 g/d) compared with the CON group that achieved positive ADG (36.4 g/d). Both of SH and BG had similar negative energy balance (EB) values (67.0 vs. 61.4 KJ/ kg 0.75 /d, for BG and SH respectively). Nitrogen balance (NB) was greater (P<0.01) for SH (107.64 mg/kg 0.75 /d ) vs. BG (89.47 mg/kg 0.75 /d) and was greater (P<0.01) for animals fed on CON intake (251.47 vs. 208.55 mg/kg 0.75 /d, respectively) than those fed on RES intake (-36.18 vs. -29.62 mg/kg 0.75 /d, respectively), which gave a negative NB. It could be concluded that with desert conditions, sheep may have an advantage in a decreasing Metabolizable energy for maintenance (MEm) requirement and reduction in heat production of a magnitude adequate to maintain body weight. There is a similar rate of using the energy between sheep and goats with moderate or limited nutrition planes.