Gabriel Nicodème Tsetagho, Martin Lekeufack, M. Mouchili, E. Tedonkeng, Th ophile Fonkou
{"title":"应用于生活污水处理湿地的克氏绿脓杆菌体外消化率及产气量研究","authors":"Gabriel Nicodème Tsetagho, Martin Lekeufack, M. Mouchili, E. Tedonkeng, Th ophile Fonkou","doi":"10.4236/OJAS.2021.114041","DOIUrl":null,"url":null,"abstract":"In order to evaluate the possibilities of valorization as the feed of the \nplant biomass produced during wastewater treatment in constructed wetlands, a \nstudy of the in vitro digestibility and gas production of Echinochloa crus-pavonis was \ncarried out in the Laboratory of Animal Production and Nutrition of the \nUniversity of Dschang. The in vitro digestibility of Echinochloa crus-pavonis was evaluated at different \nharvesting periods. The digestibility parameters of E. crus-pavonis samples \nwere determined by the in vitro method at different phenological stages. The gas \nproduction (GP) during 24 h of incubation was assessed using the in vitro incubation technique \nwith bovine rumen fluid. In vitro dry matter digestibility (IVDM) values \nranged from 52.09% to 64.76% with a decrease observed with the phenological \nstages of E. crus-pavonis (from 64.76% at the leafy stage to 52.09% at the flowering stage). The \nmicrobial biomass (MB) values varied significantly between 67.99 and 88.45 mg, \nwith no significant difference observed between the leafy (88.45 mg), bolting \n(82.93 mg), and early heading (80.26 mg) stages (P > 0.05). On the other \nhand, changes in the gas produced during 24 h from the studied samples of E. crus-pavonis (34.9 \nand 48 ml/500mg) and volatile fatty acids (VFA) values (1.08 and 0.80 mmol/ml) \ndecreased significantly (P E. crus-pavonis in \nrumen fluid significantly decreased with advanced plant maturity (P E. crus-pavonis. By \ncombining the requirements of an optimal quantitative and qualitative \nproduction of E. crus-pavonis, \nharvesting at the bolting or early heading stage is an option of choice for \nexploitation as forage, under the conditions of this study. Based on the in vitro digestibility \nparameters studied, E. crus-pavonis is suitable as a ruminant feed.","PeriodicalId":62784,"journal":{"name":"动物科学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2021-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"In Vitro Digestibility and Gas Production from E. crus-pavonis Used in Wetlands from Domestic Wastewater Treatment\",\"authors\":\"Gabriel Nicodème Tsetagho, Martin Lekeufack, M. Mouchili, E. Tedonkeng, Th ophile Fonkou\",\"doi\":\"10.4236/OJAS.2021.114041\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In order to evaluate the possibilities of valorization as the feed of the \\nplant biomass produced during wastewater treatment in constructed wetlands, a \\nstudy of the in vitro digestibility and gas production of Echinochloa crus-pavonis was \\ncarried out in the Laboratory of Animal Production and Nutrition of the \\nUniversity of Dschang. The in vitro digestibility of Echinochloa crus-pavonis was evaluated at different \\nharvesting periods. The digestibility parameters of E. crus-pavonis samples \\nwere determined by the in vitro method at different phenological stages. The gas \\nproduction (GP) during 24 h of incubation was assessed using the in vitro incubation technique \\nwith bovine rumen fluid. In vitro dry matter digestibility (IVDM) values \\nranged from 52.09% to 64.76% with a decrease observed with the phenological \\nstages of E. crus-pavonis (from 64.76% at the leafy stage to 52.09% at the flowering stage). The \\nmicrobial biomass (MB) values varied significantly between 67.99 and 88.45 mg, \\nwith no significant difference observed between the leafy (88.45 mg), bolting \\n(82.93 mg), and early heading (80.26 mg) stages (P > 0.05). On the other \\nhand, changes in the gas produced during 24 h from the studied samples of E. crus-pavonis (34.9 \\nand 48 ml/500mg) and volatile fatty acids (VFA) values (1.08 and 0.80 mmol/ml) \\ndecreased significantly (P E. crus-pavonis in \\nrumen fluid significantly decreased with advanced plant maturity (P E. crus-pavonis. By \\ncombining the requirements of an optimal quantitative and qualitative \\nproduction of E. crus-pavonis, \\nharvesting at the bolting or early heading stage is an option of choice for \\nexploitation as forage, under the conditions of this study. Based on the in vitro digestibility \\nparameters studied, E. crus-pavonis is suitable as a ruminant feed.\",\"PeriodicalId\":62784,\"journal\":{\"name\":\"动物科学期刊(英文)\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-08-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"动物科学期刊(英文)\",\"FirstCategoryId\":\"1091\",\"ListUrlMain\":\"https://doi.org/10.4236/OJAS.2021.114041\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"动物科学期刊(英文)","FirstCategoryId":"1091","ListUrlMain":"https://doi.org/10.4236/OJAS.2021.114041","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
In Vitro Digestibility and Gas Production from E. crus-pavonis Used in Wetlands from Domestic Wastewater Treatment
In order to evaluate the possibilities of valorization as the feed of the
plant biomass produced during wastewater treatment in constructed wetlands, a
study of the in vitro digestibility and gas production of Echinochloa crus-pavonis was
carried out in the Laboratory of Animal Production and Nutrition of the
University of Dschang. The in vitro digestibility of Echinochloa crus-pavonis was evaluated at different
harvesting periods. The digestibility parameters of E. crus-pavonis samples
were determined by the in vitro method at different phenological stages. The gas
production (GP) during 24 h of incubation was assessed using the in vitro incubation technique
with bovine rumen fluid. In vitro dry matter digestibility (IVDM) values
ranged from 52.09% to 64.76% with a decrease observed with the phenological
stages of E. crus-pavonis (from 64.76% at the leafy stage to 52.09% at the flowering stage). The
microbial biomass (MB) values varied significantly between 67.99 and 88.45 mg,
with no significant difference observed between the leafy (88.45 mg), bolting
(82.93 mg), and early heading (80.26 mg) stages (P > 0.05). On the other
hand, changes in the gas produced during 24 h from the studied samples of E. crus-pavonis (34.9
and 48 ml/500mg) and volatile fatty acids (VFA) values (1.08 and 0.80 mmol/ml)
decreased significantly (P E. crus-pavonis in
rumen fluid significantly decreased with advanced plant maturity (P E. crus-pavonis. By
combining the requirements of an optimal quantitative and qualitative
production of E. crus-pavonis,
harvesting at the bolting or early heading stage is an option of choice for
exploitation as forage, under the conditions of this study. Based on the in vitro digestibility
parameters studied, E. crus-pavonis is suitable as a ruminant feed.