摘要：
Miscanthus lutarioriparius grown in Dongting Lake has an annual biomass yield potential of 1 million tons. However, with the shutdown of its previous utilization for paper-making, abandoning this huge amount of biomass has caused serious economic, ecological, and social problems. Constructing an industrial cluster to continuously convert biomass into various bioproducts is a win-win measure to address this dilemma. With the increasing confirmation of the importance of biomass quality affecting the conservation process, fully understanding the biomass characteristics of Dongting Lake-grown M. lutarioriparius is crucial for building a scientific industrial cluster. The present work is designed to explore the variation in biomass quality across the entire Dongting Lake area. Results show that the biomass contented with Cd, Mn, Zn, and Cr has significant geographical differences, with a general trend of Southern Dongting Lake-grown biomass having a higher concentration than that from Eastern and Western Dongting Lake areas. Moreover, significant differences are found in terms of biomass ash content, lignin content, and the degree of polymerization of cellulose (DP). The biomass with low ash content is generally from the entire Eastern Dongting Lake area and the northern part of the Western Dongting Lake area. Virtually all Western Dongting Lake-grown biomass has a low lignin content (approximately 18%). Regarding the spatial variation of DP, Eastern Dongting Lake-grown biomass has a higher DP (average at 585.33) than that in Southern (575.15) and then Western Dongting Lake (529.16). Based on these quality indicators, the biomass production potentials for bioethanol, biochar, and xylo-oligosaccharide were calculated and visualized. Results show that biomass from almost the entire Western and Eastern Dongting Lake area is suitable for bioethanol and xylo-oligosaccharide production, while biomass from the Southern Dongting Lake area for biochar production. These results provide scientific guidance for the future utilization of Dongting Lake-grown M. lutarioriparius biomass.
摘要：
ScopeOlive oil, rapeseed oil, and lard are dietary fats rich in monounsaturated fatty acids, but the effects of dietary oils enriched in monounsaturated fatty acids on hepatic lipid deposition have seldom been compared.Methods and resultsNinety 8-week-old C57BL/6J male mice are randomly divided into six groups and fed diets containing lard, rapeseed oil, or olive oil with a 10% or 45% fat energy supply for 16 weeks. Under high-fat conditions, serum total cholesterol levels in the lard and olive oil groups are significantly higher than those in the rapeseed oil group. Hepatic lipid content in the olive oil group is higher than that in the other two groups. Compared with rapeseed oil, lard increases the liver levels of arachidonic, palmitic, and myristic acids and decreases the levels of eicosapentaenoic linolenic acid and linoleic acid. Olive oil increases the liver levels of docosatrienoic, arachidonic, oleic, and myristic acids; maltose; and fructose and decreases the levels of eicosapentaenoic, linolenic, and linoleic acids.ConclusionOlive oil probably causes hepatic lipid deposition in mice, which may enhance hepatic lipid synthesis by activating the starch and sucrose metabolic pathways. By contrast, rapeseed oil shows a significant anti-lipid deposition effect on the liver. Olive oil, rapeseed oil, and lard are dietary fats that are rich in monounsaturated fatty acids. This study investigates the effects of three dietary oils on hepatic glucose and lipid metabolism in mice. Compared to rapeseed oil and lard, olive oil is most likely to cause hepatic lipid deposition by activating the metabolic pathways of starch and sucrose. image
通讯机构：
[Mingliang Wu] L;Laboratory for Mechanization Production of Oilseed Crops, College of Mechanical and Electrical, Hunan Agricultural University, Changsha 410128, China<&wdkj&>Hunan Provincial Engineering Technology Research Center for Modern Agricultural Equipment, Changsha 410128, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
DEM;calibration method;ridge and furrow opening;typical clay loam in the middle and lower reaches of the Yangtze River
通讯机构：
[Yang, S ] H;Hunan Agr Univ, Hunan Engn Lab Ecol Applicat Miscanthus Resources, Changsha 410128, Peoples R China.;Hunan Agr Univ, Orient Sci & Technol Coll, Changsha, Peoples R China.
关键词：
Dongting Lake wetland;Point pattern analysis;interspecific associations;Miscanthus lutarioriparius;Phragmites communis
摘要：
In this study, we examined the community structure and composition of Miscanthus lutarioriparius and Phragmites communis populations in the Dongting Lake area by setting up sample plots in three research areas (West Dongting, South Dongting, and East Dongting). We used the Ripley K function to analyze the spatial distribution pattern and interspecific association of the two populations in different regions. Our findings showed that: 1. There were significant differences in plant height, node number, stem diameter, branch number, and population density between the two populations with the change of the study area. 2. In West Dongting Lake, the M. lutarioriparius population exhibited a random distribution in 0-1m, an aggregated distribution in 1-2.6m, and a random distribution in 2.6-5m. The P. communis population showed a random distribution at 0-0.2m, an aggregated distribution at 0.2-4.8m, and a random distribution at 4.8-5m. In South Dongting Lake, the M. lutarioriparius population showed a random distribution in 0-5m, and the P. communis population showed a random distribution at 0-0.9m, an aggregated distribution at 0.9-2.5m, and a random distribution at 2.5-5m. In the East Dongting Lake area, the M. lutarioriparius population exhibited an aggregated distribution at 0-5m, while the P. communis population showed a random distribution at 0-0.6m and an aggregated distribution at 0.6-5m.3.In West Dongting Lake, there was no correlation between the M. lutarioriparius and P. communis populations at 0-5m. In South Dongting Lake, the two populations showed no correlation at 0-1.8m, positive correlation at 1.8-4.7m, and no correlation at 4.7-5m. In East Dongting Lake, there was no correlation between the populations of M. lutarioriparius and P. communis at 0-0.2m, while they were positively correlated at 0.2-5m. Overall, our study highlights the spatial distribution characteristics and influencing factors of M. lutarioriparius and P. communis populations in the Dongting Lake area, which can provide important guidance for the conservation and management of wetland ecosystems in this region.
