青海高寒山区种植密度对青麦10号春小麦群体性状及产量的影响*     

朱丽丽  李想  宋生禄  李文军  王元兰  王富姐  徐慧君  陈志国 《现代农业科技》2021,6(6)

目的：经过1-2年的试验,掌握春小麦新品种青麦10号在青海春麦主产区适宜的种植密度。方法：利用方差分析和相关分析获得种植密度对青麦10号的产量及产量构成因素影响的关系。结论：种植密度对青麦10号各农艺性状的影响差异显著,综合各群体性状指标,中密度处理可获得较好产量,本研究为青麦10号的推广提供理论依据。  相似文献   

IL-10 Gene Polymorphisms and Their Association with Immune Traits in Four Rabbit Populations     

Xiaoying WAN  Liuliu MAO  Ting LI  Lizhi QIN  Yulai PAN  Bichun LI  Xinsheng WU 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2014,76(3):369-375

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PRRSV特异性肽对CSF、PRRS免疫猪IFN-Y、IL-10分泌的影晌     

郎广平  郭敏  梁志选  冯娇  孔惟博  任少敏  李彬  韩盈盈  赵建增  高英杰 《兽医大学学报》2014,(2):187-191

应用PRRSV-GP5特异性肽刺激CSF、PRRS免疫猪外周血淋巴细胞,采用EI。IsA方法测定不同时间点淋巴细胞分泌IFN-7及IL-10的水平,分析PRRSv_GP5特异性肽刺激后,淋巴细胞培养上清中细胞因子的变化规律。结果显示,CSFV高抗PRRSV低抗体组于PRRSV免疫14d,肽刺激组中IFN-7水平显著高于对照组（P〈0．05）;其他组均差异不显著（P〉0．05）。PRRSV免疫14d,细胞培养24,72h后加PRRSV—GP5肽刺激,各组中试验组与对照组相比IL-10水平明显降低（P〈0．01）;PRRSV免疫28d,各组中肽刺激组与空白组相比,IL-10水平均无显著性差异（P〉0．05）。结果表明,PRRSV-GP5肽在PRRSV免疫早期可以促进IFN-7的分泌,并抑制IL-10的产生,但在免疫后期对淋巴细胞分泌的调节作用还需进-步研究。  相似文献   

Bovine papillomavirus type 10 with a deletion associated with a lingual papilloma in a cow     

Wei Zhu  Jianbao Dong  Kazuyuki Uchida  Ken-ichi Watanabe  Hiroyuki Nakayama  Yoshitaka Goto  Takeshi Haga 《Veterinary journal (London, England : 1997)》2014,199(2):303-305

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粉垄“4453”增产提质效应及其利民利国发展潜能     

韦本辉 《农业科学与技术》2014,(10):1767-1769

袁隆平院士接受媒体记者提出:"粉垄技术可在全国推广"。该文介绍了粉垄重构农田耕作层具"4453"效应,即:"四增"—增加耕层松土量、土壤原生养分利用量,增大"土壤水库"、"土壤氧气库";"四减"—减少水土流失、碳排放量,减低耕层土壤含盐量、重金属含量;"五抗"—增强作物抗干旱、高温、低温、病害、倒伏等能力;"三提高"—促进作物光合效率提高10%以上,产量提高10%~30%以上,品质提高5%以上;人力、畜力、拖拉机耕作依次具增产10%规律,粉垄耕作则还具函拖拉机耕作加上再翻倍深松耕层叠加效应可达20甚至更高增产;指出如全国推广10亿亩,可增贮天然降水400亿立方,盘活土壤原生养分后可减少化肥施用量70多亿千克,新增粮食可多养活3亿多人,产生总体效应还可以助力提升国民身体健康水平和社会稳定、国家安全。  相似文献   

西藏墨竹工卡积雪时空分布特征分析     

于金媛  朗卡旺青  加永泽巴  央金卓玛  土登次仁  丹增卓玛 《安徽农业科学》2014,(30):10602-10603,10631

利用MODIS10A2积雪产品数据（2001～2013年）对西藏墨竹工卡县积雪的时间变化及其空间分布特征进行分析,结果表明,西藏墨竹工卡地区墨竹工卡98.62％的区域积雪持续日数是不超过180d;积雪随着海拔升高,持续天数也在增加;积雪覆盖率年际变化趋势不明显,但季节性差异大.  相似文献   

苦参注射液治疗乙型肝炎性肝硬化疗效及其作用机制研究     

暴秀兰  尹桂华 《吉林林学院学报》2014,(6):780-782

目的：观察苦参注射液对慢性乙型肝炎性肝硬化的临床效果及其作用机制.方法将58例慢性乙型肝炎性肝硬化患者随机分为观察组和对照组,在一般支持治疗的基础上,观察组加用苦参注射液,治疗8周后,比较两组肝功能、肝纤维化指标.结果观察组肝功能改善显著,肝纤维化减轻,与对照组比较差异均有统计学意义（P〈0.05）.结论在正常治疗基础上加用苦参注射液,有助于肝炎性肝硬化患者的肝功能恢复,有较好的临床效果.其作用机制可能是通过影响外周单核细胞IL-10表达、调节机体促炎抗炎平衡而实现的.  相似文献   

Fungal growth on a common wood substrate across a tropical elevation gradient: Temperature sensitivity, community composition, and potential for above-ground decomposition     

Courtney L. Meier  Josh Rapp  Miles Silman 《Soil biology & biochemistry》2010,42(7):1083-1090

Fungal breakdown of plant material rich in lignin and cellulose (i.e. lignocellulose) is of central importance to terrestrial carbon (C) cycling due to the abundance of lignocellulose above and below-ground. Fungal growth on lignocellulose is particularly influential in tropical forests, as woody debris and plant litter contain between 50% and 75% lignocellulose by weight, and can account for 20% of the C stored in these ecosystems. In this study, we evaluated factors affecting fungal growth on a common wood substrate along a wet tropical elevation gradient in the Peruvian Andes. We had three objectives: 1) to determine the temperature sensitivity of fungal growth - i.e. Q₁₀, the factor by which fungal biomass increases given a 10 °C temperature increase; 2) to assess the potential for above-ground fungal colonization and growth on lignocellulose in a wet tropical forest; and 3) to characterize the community composition of fungal wood decomposers across the elevation gradient. We found that fungal growth had a Q₁₀ of 3.93 (95% CI of 2.76-5.61), indicating that fungal biomass accumulation on the wood substrate nearly quadrupled with a 10 °C increase in temperature. The Q₁₀ for fungal growth on wood at our site is higher than Q₁₀ values reported for litter decomposition in other tropical forests. Moreover, we found that above-ground fungal growth on the wood substrate ranged between 37% and 50% of that measured in the soil, suggesting above-ground breakdown of lignocellulose represents an unexplored component of the C cycle in wet tropical forests. Fungal community composition also changed significantly along the elevation gradient, and Ascomycota were the dominant wood decomposers at all elevations. Fungal richness did not change significantly with elevation, directly contrasting with diversity patterns observed for plant and animal taxa across this gradient. Significant variation in fungal community composition across the gradient suggests that the characteristics of fungal decomposer communities are, directly or indirectly, influenced by temperature.  相似文献   

Unfrozen water content moderates temperature dependence of sub-zero microbial respiration     

E.L. Tilston  T. Sparrman 《Soil biology & biochemistry》2010,42(9):1396-1407

Abrupt increases in the temperature sensitivity of soil respiration below 0 °C have been interpreted as a change in the dominance of other co-dependent environmental controls, such as the availability of liquid-state water. Yet the relationship between unfrozen water content and soil respiration at sub-zero temperatures has received little attention because of difficulties in measuring unfrozen water contents. Using a recently-developed semi-solid ²H NMR technique the unfrozen water content present in seasonally frozen boreal forest soils was quantified and related to biotic CO₂ efflux in laboratory microcosms maintained at temperatures between −0.5 and −8 °C. In both soils the unfrozen water content had an exponential relationship with temperature and was increased by addition of KCl solutions of defined osmotic potential. Approximately 13% unfrozen water was required to release the dependence of soil respiration on unfrozen water content. Depending on the osmotic potential of soil solution, this threshold unfrozen water content was associated with temperatures down to −6 °C; yet if temperature were the predictor of CO₂ efflux, then the abrupt increase in the temperature sensitivity of CO₂ efflux was associated with −2 °C, except in soils amended with −1500 kPa KCl which did not show any abrupt changes in temperature sensitivity. The KCl-amendments also had the effect of decreasing Q₁₀ values and activation energies (Ea) by factors of 100 and three, respectively, to values comparable with those for soil respiration in unfrozen soil. The disparity between the threshold temperatures and the reductions in Q₁₀ values and activation energies after KCl amendment indicates the significance of unfrozen water availability as an environmental control of equal importance to temperature acting on sub-zero soil respiration. However, this significance was diminished when soils were supplied with abundant labile C (sucrose) and the influences of other environmental controls, allied to the solubility and diffusion of respiratory substrates and gases, are considered to increase.  相似文献   

Immune response of broiler chickens supplemented with prebiotic from Sacharomyces cerevisiae challenged with Salmonella enteritidis or Minnesota     

《The Journal of Applied Poultry Research》2016,25(2):165-172

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