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121.
基于SWAT模型的西江流域径流模拟研究 总被引:1,自引:0,他引:1
采用SWAT(Soil and Water Assessment Tool)模型,在整个珠江流域构建分布式水文模型,对西江流域1951~2008年的月径流过程进行模拟。选取西江流域的迁江、柳州、武宣3个水文站的径流数据,利用SWAT模型自带的敏感性分析模块和自动率定模块,采用LH-OAT敏感性分析方法和SCE-UA算法分别对选取的各参数进行敏感性分析和参数率定,并对率定模型进行验证。敏感性分析结果表明,不同的参数对流域月径流过程表现出不同程度的敏感度,其中CN2、ESCO、SOL_AWC、CH_K2和ALPHA_BF的敏感度较高,是较敏感因子。从率定和验证结果来看,3个水文站的径流模拟效果均较好,Nash-Suttcliffe效率系数ENS均在0.75以上,其中柳州站和武宣站率定期和验证期的ENS在0.8以上。SWAT分布式水文模型在西江流域月径流模拟中的应用效果良好。 相似文献
122.
GUO Yuan LIU Zong-zheng LIU Le MENG Fan-hua ZHANG Yan-ru ZHOU Huan-min LIU Chun-xia 《中国畜牧兽医》2016,43(11):3011-3018
In order to obtain the cloned sheep using bone marrow mesenchymal stem cells(BMSCs)as the donor cells,the BMSCs of sheep were chosen and reconstructed embryos were built to transfer.10 published microsatellite markers were chosen,and the DNA samples from clone sheep,donor cells and surrogate ewes were amplified,and the relationship of father-son(RCP)was analyzed using the Quantity One for genotyping.The results showed that the reconstructed embryos were successfully built for electric fusion using sheep BMSCs as nuclear donor,and making nuclear transplantation into enucleated mature oocytes of which the fusion rate was 80.62%.20 surrogate ewe were chosen to be implanted with the reconstructed embryos at morula stage by implant surgery,and 5 lambs were born and only 3 were survived.The genotype of cloned sheep was in line with the dornor cell and the RCP were more than 99.999%.In conclusion,the first clone sheep were obtained successfully by using BMSCs as a nuclear donor in this experiment. 相似文献
123.
YUE Yuan CHEN Hong-yan WANG Jia-wei XU Ming-qiang DING Yu JIANG Hao GAO Yan ZHANG Jia-bao YAN Shou-qing 《中国畜牧兽医》2016,43(3):585-591
The aim of this study was to investigate the differential expression genes induced by ApoCⅢ,and study the function of ApoCⅢ.Porcine aortic vascular endothelial cells were successfully isolated using enzyme digestion,and then screened the differential expression genes induced by ApoCⅢ using the Solexa high-throughput sequencing technology.The results showed 647 differential expression genes,including 390 up-regulated genes and 257 down-regulated genes.The qRT-PCR results verified that the gene expression results from Solexa sequencing data were reliable.GO and Pathway analysis showed that the function of differential expression genes were related to immune response,cell apoptosis and death.These findings suggested that ApoCⅢ affected the physiological function of porcine aortic endothelial cells by the molecular pathways of inflammation,cell adhesion and apoptosis,which provided a theoretical basis for further understanding the molecular mechanisms of atherosclerosis caused by ApoCⅢ. 相似文献
124.
铁皮石斛优质试管苗繁育技术研究 总被引:1,自引:0,他引:1
以野生铁皮石斛为试材,采用限根培养法,研究了铁皮石斛种子非共生萌发特性及优质试管苗繁育技术。结果表明:授粉120d的种子达到生理成熟,能够顺利萌发;授粉140d种子达到形态成熟,萌发率可达98.51%;低温黑暗限制保存原球茎可控制其生长;在特定容器中用限根培养基MS+0.10mg·L~(-1) 6-BA+0.3mg·L~(-1) NAA+香蕉泥80g·L~(-1)培养小苗可得到优质试管苗;把试管苗移栽到松树皮中,成活率可达97.62%,该研究为铁皮石斛产业化育苗提供了新方法。 相似文献
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棉隆对病原细菌、真菌、根结线虫及杂草均有较高防效,而且作为固体微颗粒剂具有使用简单、安全的特性,被广泛用于作物种植前熏蒸土壤以防治土传病虫害。施用过程中,土壤环境因素(包括土壤类型、土壤温湿度、土壤有机质及pH等)、施药方式、施药季节和施药剂量均会对棉隆的熏蒸效果产生显著影响,不正确的使用方式常会导致熏蒸效果不理想或产生药害问题。该文系统综述土壤熏蒸剂棉隆的使用概况(包括作用机制、适用作物、施用方式和施用效果等)、存在的问题及原因分析(包括施用深度、水分、温度对棉隆有效成分含量的影响及其熏蒸对土壤微生物群落结构的影响等)、解决对策(包括改善施药方式、优化土壤环境和活化熏蒸后土壤微生物等)以及未来发展趋势,以期为棉隆的高效应用提供借鉴。 相似文献
130.
Qian ZHANG Mo LI Yuan YIN Shiyong GE Danjie LI Ibrahim M. AHMAD Ghulam NABI Yanfeng SUN Xu LUO Dongming LI 《Integrative zoology》2023,18(5):891-905
Human commensal species take advantage of anthropogenic conditions that are less likely to be challenged by the selective pressures of natural environments. Their morphological and physiological phenotypes can therefore dissociate from habitat characteristics. Understanding how these species adjust their morphological and physiological traits across latitudinal gradients is fundamental to uncovering the eco-physiological strategies underlying coping mechanisms. Here, we studied morphological traits in breeding Eurasian tree sparrows (ETSs; Passer montanus) among low-latitude (Yunnan and Hunan) and middle-latitude (Hebei) localities in China. We then compared body mass; lengths of bill, tarsometatarsus, wing, total body, and tail feather; and baseline and capture stress-induced levels of plasma corticosterone (CORT) and the metabolites including glucose (Glu), total triglyceride (TG), free fatty acid (FFA), total protein, and uric acid (UA). None of the measured morphological parameters varied with latitude except in the Hunan population, which demonstrated longer bills than those in other populations. Stress-induced CORT levels significantly exceeded baseline levels and decreased with increasing latitude, but total integrated CORT levels did not vary with latitude. Capture stress-induced significantly increased Glu levels and decreased TG levels, independent of site. However, the Hunan population had significantly higher baseline CORT, baseline and stress-induced FFA levels, but lower UA levels, which differed from other populations. Our results suggest that rather than morphological adjustments, physiological adjustments are mainly involved in coping mechanisms for middle-latitude adaptation in ETSs. It is worth investigating whether other avian species also exhibit such dissociation from external morphological designs while depending on physiological adjustments. 相似文献