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我国秸秆人造板产业现状及前景

中国人造板 2016年第3期23卷 16-18,23页

作者：卢军虎龚茹万华生态板业股份有限公司北京102200

简要介绍了秸秆人造板产业的起源与发展,阐述了我国秸秆人造板产业现状与政策环境,展望了秸秆人造板产业之前景。

关键词：农作物秸秆秸秆人造板政策环境

考虑桩-土-垫层共同作用的刚性桩复合地基沉降计算方法

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河南科学 2013年第8期31卷 1213-1218页

作者：黄慧陆俊虎郭院成濮阳职业技术学院河南濮阳456600 郑州大学土木工程学院郑州450001

分析了刚性单桩桩复合地基的荷载传递机制,针对单桩复合地基中桩、土、垫层相互作用特点,基于荷载传递法,通过简化桩土单元体竖向相对位移分布模式,引入弹塑性荷载传递模型,并考虑桩体的上刺与下刺变形,建立了刚性单桩复合地基沉降计算... 详细信息

分析了刚性单桩桩复合地基的荷载传递机制,针对单桩复合地基中桩、土、垫层相互作用特点,基于荷载传递法,通过简化桩土单元体竖向相对位移分布模式,引入弹塑性荷载传递模型,并考虑桩体的上刺与下刺变形,建立了刚性单桩复合地基沉降计算的基本微分方程,进而提出了一种新的能考虑桩-土-垫层体系共同作用的单桩复合地基沉降计算方法.结合现场单桩复合地基静载荷试验进行对比分析,结果表明,所建立沉降计算方法的计算结果与实测值吻合较好,且该方法计算工作量小,可为工程计算提供一定的参考.

关键词：刚性单桩复合地基沉降计算

Reclamation during oasification is conducive to the accumulation of the soil organic carbon pool in arid land

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Journal of Arid Land 2023年第3期15卷 344-358页

作者： YANG Yuxin GONG lu TANG junhu College of Ecology and Environment Xinjiang UniversityUrumqi 830017China Key Laboratory of Oasis Ecology Ministry of EducationUrumqi 830017China Xinjiang Jinghe Observation and Research Station of Temperate Desert Ecosystem Ministry of EducationUrumqi 830017China

Soil organic carbon(SOC)and its stable isotope composition reflect key information about the carbon cycle in *** of carbon fractions in oasis continuous cotton-cropped fields can elucidate the SOC stability mechanism under the action of the human-land relationship during the oasification of arid land,which is critical for understanding the carbon dynamics of terrestrial ecosystems in arid lands under global climate *** this study,we investigated the Alar Reclamation Area on the northern edge of the Tarim Basin,Xinjiang Uygur Autonomous Region of China,in *** original desert and oasis farmlands with different reclamation years,including 6,10,18,and 30 a,and different soil depths(0-20,20-40,40-60 cm),we analyzed the variations in SOC,very liable carbon(C_(VL)),liable carbon(C_(L)),less liable carbon(C_(LL)),and non-liable carbon(C_(NL))using the method of spatial *** differences in the stable carbon isotope ratio(δ^(13)C)and beta(β)values reflecting the organic carbon decomposition rate were also determined during *** redundancy analysis,we derived and discussed the relationships among SOC,carbon fractions,δ^(13)C,and other soil physicochemical properties,such as the soil water content(SWC),bulk density(BD),pH,total salt(TS),total nitrogen(TN),available phosphorus(AP),and available potassium(AK).The results showed that there were significant differences in SOC and carbon fractions of oasis farmlands with different reclamation years,and the highest SOC was observed at the oasis farmland with 30-a reclamation year.C_(VL),C_(L),C_(LL),and C_(NL) showed significant changes among oasis farmlands with different reclamation years,and C_(VL) had the largest variation range(0.40-4.92 g/kg)and accounted for the largest proportion in the organic carbon *** proportion of C_(NL) in the organic carbon pool of the topsoil(0-20 cm)gradually increased.δ^(13)C varied from-25.61‰to-22.58‰,with the topsoil showing the most positive va

关键词： oasification soil organic carbon carbon fractions labile carbon δ^(13)C arid land

The Identification and Geological Significance of Fault Buried in the Gasikule Salt Lake in China based on the Multi-source Remote Sensing Data

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Acta Geologica Sinica(English Edition) 2021年第3期95卷 996-1007页

作者： WANG junhu ZHAO Yingjun WU Ding lu Donghua National Key Laboratory of Remote Sensing Information and Image Analysis Technology Beijing Research Institute of Uranium GeologyBeijing 100029China

The salinity of the salt lake is an important factor to evaluate whether it contains some mineral resources or not,the fault buried in the salt lake could control the abundance of the ***,it is of great geological importance to identify the fault buried in the salt *** the Gasikule Salt Lake in China for example,the paper established a new method to identify the fault buried in the salt lake based on the multi-source remote sensing data including Landsat TM,SPOT-5 and ASTER *** includes the acquisition and selection of the multi-source remote sensing data,data preprocessing,lake waterfront extraction,spectrum extraction of brine with different salinity,salinity index construction,salinity separation,analysis of the abnormal salinity and identification of the fault buried in salt lake,temperature inversion of brine and the fault *** a result,the study identified an important fault buried in the east of the Gasikule Salt Lake that controls the highest salinity *** the level of the salinity is positively correlated to the mineral abundance,the result provides the important reference to identify the water body rich in mineral resources in the salt lake.

关键词： multi-source remote sensing data Gasikule Salt Lake Mangya depression China

Spatiotemporal variations of ecosystem services and driving factors in the Tianchi Bogda Peak Natural Reserve of Xinjiang,China

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Journal of Arid Land 2024年第6期16卷 816-833页

作者： ZHU Haiqiang WANG Jinlong TANG junhu DING Zhaolong GONG lu Key Laboratory of Sustainable Development of Xingjiang's Historical and Cultural Tourism Xinjiang UniversityUrumqi 830046China College of Tourism Xinjiang UniversityUrumqi 830046China Ecological Postdoctoral Research Station Xinjiang UniversityUrumqi 830046China College of Ecology and Environment Xinjiang UniversityUrumqi 830017China

Nature reserves play a significant role in providing ecosystem services and are key sites for biodiversity *** Tianchi Bogda Peak Natural Reserve(TBPNR),located in Xinjiang Uygur Autonomous Region,China,is an important ecological barrier area in the temperate arid *** evaluation of its important ecosystem services is of great significance to improve the management level and ecological protection efficiency of the *** the present study,we assessed the spatiotemporal variations of four ecosystem services(including net primary productivity(NPP),water yield,soil conservation,and habitat quality)in the TBPNR from 2000 to 2020 based on the environmental and social data using the Integrated Valuation of Ecosystem Services and Trade-offs(InVEST)*** addition,the coldspot and hotspot areas of ecosystem services were identified by hotspot analysis,and the trade-off and synergistic relationships between ecosystem services were analyzed using factor analysis in a geographic *** the study period,NPP and soil conservation values in the reserve increased by 48.20%and 25.56%,respectively;conversely,water yield decreased by 16.56%,and there was no significant change in habitat ***,both NPP and habitat quality values were higher in the northern part and lower in the southern part,whereas water yield showed an opposite *** analysis revealed that NPP showed a synergistic relationship with habitat quality and soil conservation,and exhibited a trade-off relationship with water *** yield and habitat quality also had a trade-off *** and habitat quality were affected by annual average temperature and Normalized Difference Vegetation Index(NDVI),respectively,while water yield and soil conservation were more affected by digital elevation model(DEM).Therefore,attention should be paid to the spatial distribution and dynamics of trade-off and synergistic relationships between ecosystem services in future ec

关键词： net primary productivity(NPP) water yield soil conservation habitat quality Integrated Valuation of Ecosystem Services and Trade-offs(InVEST)model geographic detector Tianchi Bogda Peak Natural Reserve

Enhancing growth rate of lettuce by mutating lettuce seeds with nuclear irradiation

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Carbon Resources Conversion 2018年第1期1卷 55-60页

作者： Jun Cheng Hongxiang lu Xin He Zongbo Yang junhu Zhou Kefa Cen State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China

To improve growth rate of hydroponics lettuce with CO_(2)aeration,lettuce seeds were mutated by nuclear irradiation(c rays from^(137)Cs)and domesticated with high concentration of CO_(2).When lettuce seeds were mutated with 30 Gy dosage,wet weight of lettuce increased by 22.3%(to 52.24 g)on the 30th day and grana volume in the chloroplasts of leaf cells increased by 244%.After the mutant(irradiated by 50 Gy dosage)was domesticated with elevated CO_(2)concentration,wet weight of lettuce increased by 74.6%(to 48.7 g)on the 24th day under 3 vol%CO_(2),compared with wet weight of lettuce under air *** showed that mutagenesis by nuclear irradiation made it possible to improve CO_(2)fixation rate in lettuce in a gene-modified way.

关键词： Biomass productivity CO_(2)domestication Grana volume Lettuce productivity

The mechanistic target of rapamycin complex 1 pathway involved in hepatic gluconeogenesis through peroxisome-proliferator-activated receptorγcoactivator-1a

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Animal Nutrition 2022年第4期11卷 121-131页

作者： Guoyan Wang Jun Zhang Shengru Wu Senlin Qin Yining Zheng Chao Xia Huijun Geng junhu Yao lu Deng College of Animal Science and Technology Northwest A&F UniversityYanglingShaanxi 712100China

Cattle can efficiently perform de novo generation of glucose through hepatic gluconeogenesis to meet post-weaning glucose *** evidence points to cattle and non-ruminant animals being characterized by phylogenetic features in terms of their differing capacity for hepatic gluconeogenesis,a process that is highly efficient in cattle yet the underlying mechanism remains *** we used a variety of transcriptome data,as well as tissue and cell-based methods to uncover the mechanisms of high-efficiency hepatic gluconeogenesis in *** showed that cattle can efficiently convert propionate into pyruvate,at least partly,via high expression of acyl-CoA synthetase short-chain family member 1(ACSS1),propionyl-CoA carboxylase alpha chain(PCCA),methylmalonyl-CoA epimerase(MCEE),methylmalonyl-CoA mutase(MMUT),and succinate-CoA ligase(SUCLG2)genes in the liver(Pluconeogenesis,such as phosphoenolpyruvate carboxykinase(PCK)and fructose 1,6-bisphosphatase(FBP),ensures the efficient operation of hepatic gluconeogenesis in cattle(Pluconeogenesis in a peroxisome proliferator-activated receptor γ coactivator 1a(PGC-1a)dependent ***,our results not only revealed an important mechanism responsible for the quantitative differences in the efficiency of hepatic gluconeogenesis in cattle versus non-ruminant animals,but also established that mTORC1 is indeed involved in the regulation of hepatic gluconeogenesis through *** results provide a novel potential insight into promoting hepatic gluconeogenesis through activated mTORC1 in both ruminants and mammals.

关键词： Hepatic gluconeogenesis Cattle mTORC1 Peroxisome-proliferator-activated receptor γcoactivator-1a

Multi‑omics reveals that the host‑microbiome metabolism crosstalk of differential rumen bacterial enterotypes can regulate the milk protein synthesis of dairy cows

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Journal of Animal Science and Biotechnology 2023年第6期14卷 2496-2513页

作者： Chenguang Zhang Mengya Wang Huifeng Liu Xingwei Jiang Xiaodong Chen Tao Liu Qingyan Yin Yue Wang lu Deng junhu Yao Shengru Wu College of Animal Science and Technology Northwest A&F UniversityShaanxi 712100 YanglingChina

Background Dairy cows’lactation performance is the outcome of the crosstalk between ruminal microbial metabo-lism and host ***,it is still unclear to what extent the rumen microbiome and its metabolites,as well as the host metabolism,contribute to regulating the milk protein yield(MPY).Methods The rumen fluid,serum and milk of 12 Holstein cows with the same diet(45%coarseness ratio),parity(2–3 fetuses)and lactation days(120–150 d)were used for the microbiome and metabolome *** metabolism(rumen metabolome)and host metabolism(blood and milk metabolome)were connected using a weighted gene co-expression network(WGCNA)and the structural equation model(SEM)*** Two different ruminal enterotypes,with abundant Prevotella and Ruminococcus,were identified as type1 and *** these,a higher MPY was found in cows with ruminal ***,[Ruminococcus]gauvreauii group and norank_f_Ruminococcaceae(the differential bacteria)were the hub genera of the *** addition,differential ruminal,serum and milk metabolome between enterotypes were identified,where the cows with type2 had higher L-tyrosine of rumen,ornithine and L-tryptophan of serum,and tetrahydroneopterin,palmitoyl-L-carnitine,S-lactoylglutathione of milk,which could provide more energy and substrate for ***,based on the identi-fied modules of ruminal microbiome,as well as ruminal serum and milk metabolome using WGCNA,the SEM analysis indicated that the key ruminal microbial module1,which contains the hub genera of the network([Ruminococcus]gauvreauii group and norank_f_Ruminococcaceae)and high abundance of bacteria(Prevotella and Ruminococcus),could regulate the MPY by module7 of rumen,module2 of blood,and module7 of milk,which contained L-tyrosine and ***,in order to more clearly reveal the process of rumen bacterial regulation of MPY,we established the path of SEM based on the L-tyrosine,L-tryptophan and related *** SEM based on th

关键词： Dairy cows Microbial and host metabolome Milk protein Ruminal microbiota enterotype Structural equation model Weighted gene co-expression network

Dietary saccharin sodium supplementation improves the production performance of dairy goats without residue in milk in summer

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Animal Nutrition 2024年第3期18卷 166-176页

作者： Xiongfei Zhang Jirong Lv Jingtao Hui Ao Wu Lichao Zhao Linyu Feng lu Deng Miao Yu Feng Liu junhu Yao Xinjian Lei College of Animal Science and Technology Northwest A&F UniversityYanglingShaanxi 712100China Key Laboratory of Livestock Biology Northwest A&F UniversityYanglingShaanxi 712100China Sichuan Provincial Animal Feeding Regulation Center DadHank Biotechnology CorporationChengduSichuan 611130China

The purpose of this study was to investigate the effects of dietary saccharin sodium supplementation on production performance,serum biochemical indicators,and rumen fermentation of dairy goats in *** Guanzhong dairy goats with similar body weight,days in milk,and milk yield were randomly divided into two dietary treatments:(1)CON:basal diet;(2)SS:basal diet+150 mg/kg saccharin sodium on the basis of dry *** experiment lasted 35 d,including 7 d for adaptation and 28 d for dietary treatments,sampling and data *** dairy goat was housed individually in a clean separate pen with ad libitum access to diet and *** goats fed SS diet had increased dry matter intake(DMI;P=0.037),4%fat corrected milk yield(P=0.049),energy corrected milk yield(P=0.037),milk protein yield(P=0.031),and total solids yield(P=0.036).Serum activity of aspartate aminotransferase(P=0.047)and concentrations of 70-kDa heat shock protein(P=0.090),malondialdehyde(P=0.092),and total protein(P=0.057)were lower in goats fed SS diet than those fed CON *** of saccharin sodium tended to increase activity of glutathione peroxidase in serum(P=0.079).The concentrations of rumen total volatile fatty acid(P=0.042)and butyrate(P=0.038)were increased by saccharin sodium *** supplementation of saccharin sodium increased the relative abundance of Lachnobacterium(P=0.022),Pseudoramibacter(P=0.022),Shuttleworthia(P=0.025),and Syntrophococcus(P=0.037),but reduced the relative abundance of Prevotella_1(P=0.037)and Lachnospiraceae_UCG_008(P=0.037)in *** sodium was observed in feces and urine of goats fed diet supplemented with saccharin sodium,but saccharin sodium was undetectable in the milk of goats receiving SS *** conclusion,administration of saccharin sodium was effective in increasing fat and energy corrected milk yield by increasing DMI and improving rumen fermentation and antioxidant capacity of dairy goats in *** addition,s

关键词： Dairy goat Heat stress Production performance Rumen fermentation Rumen microorganisms Saccharin sodium