近红外技术(NIR)在小麦商品粮收购中的应用研究   总被引：7，自引：0，他引：7  

胡新中郭波莉  魏益民张国权　欧阳韶晖 《西北农林科技大学学报(自然科学版)》2002,30(Z1):65-67

利用近红外谷物品质分析仪 (Perten DA910 0 ) ,对陕西省某县 6 2 4户农民 2 0 0 0年夏季上缴粮库的公购粮进行现场品质分析。结果认为 :人工主观评定的商品粮等级与其蛋白质含量、水分含量、硬度、沉淀值、烘烤体积无显著相关性 ;近红外谷物品质分析仪 (Perten DA910 0 )完全能够满足粮库验粮的需要 ;小麦籽粒硬度、蛋白质含量是商品粮收购定级的重要指标  相似文献   

农机“大”国勿忘“小”处     

朱礼好 《当代农机》2011,(3):27

日前,中国农机工业协会发布的2010年农机工业运行报告显示,2010年我国农机行业共完成工业总产值2838.1亿元,比2009年同期增长26.36%;工业销售产值完成2768.15亿元,比2010年同期增长25.46%。据工业协会的人士介绍,这个数字使我国成为仅次于美国的第二大农机制造国。  相似文献   

天然林保护工程封山育林国家投资标准探讨   总被引：1，自引：0，他引：1  

张铁平  卢立 《林业调查规划》2013,(5):76-78

以重庆市涪陵区2012年天保工程封山育林规划设计概算为依据，将涪陵区现行天保工程封山育林按国家标准的投资进行细分，在此基础上结合实际情况进行重新调整，提出了天保工程封山育林新标准，为确定天保工程封山育林标准提供参考。  相似文献   

固定沙地樟子松容器育苗及造林技术研究     

张执慧  张振立 《内蒙古林业调查设计》2010,33(1):21-22,79

樟子松容器苗造林是一项实用高效的林业造林生产技术,对半干旱固定沙地较为适宜。文章介绍了樟子松容器育苗技术及容器苗造林技术,旨在提高樟子松育苗成活率,并在当地推广此项技术。  相似文献   

保定市科技兴农现状与建议     

任咏梅  胡士杰  白丽 《农技服务》2013,30(5)

2012年中央一号文文件强调,实现农业持续稳定发展、长期确保农产品有效供给,根本出路在科技。笔者肯定了保定市科技兴农的成果,同时也客观分析保定市在科技兴农中存在的不足之处,并提出了相关建议,以期保定市的农业真正实现可持续增长。  相似文献   

A Technique for Rearing Chilo suppressalis in the Large Scale with an Oligidic Diet in Laboratory     

HU Yang  ZHENG Yong li  CAO Guo lian  FU Qiang 《中国水稻科学》2013,27(5):535

  相似文献   

Systemic View on Heading and Overwintering: Are They Always Opposed?     

A. Šimkūnas  S. Valašinaitė  V. Denisov  A. Salytė 《Journal of Agronomy and Crop Science》2013,199(6):460-465

The study investigated the cultivars of non‐obligatorily requiring vernalization plant Festulolium braunii and assessed the influence of non‐hardy reproductive and hardy vegetative structures on overwintering effect. The study was conducted taking into account systemic relations between these types of structures. The results show the cultivars differ according to the percentage of headed and overwintered plants, when the cultivars with the most abundant heading – ‘Felopa’ and ‘Sulino’ – are also better at overwintering. The positive correlation between heading and overwintering characteristics was also observed, what seemed to be a rather new finding. It can be explained by systemic effect: non‐hardy later reproductive structures induce the post‐generative regrowth of vegetative shoots, which during shorter days halt development and become potentially hardy. More detailed interpretation is also provided including discussion of causal mechanisms of the detected phenomenon. The authors suppose that these mechanisms constitute a survival strategy for such perennial plants. The observed late heading which represents reproductive structures could be applied in plant breeding as a marker of winter‐hardiness among perennial grass plants which non‐obligatorily demand vernalization.  相似文献   

Downstream drift of round goby (Neogobius melanostomus) and tubenose goby (Proterorhinus semilunaris) in their non‐native area     

Michal Janáč  Luděk Šlapanský  Zdenka Valová  Pavel Jurajda 《Ecology of Freshwater Fish》2013,22(3):430-438

Several Ponto‐Caspian gobiid species have recently expanded their ranges in Europe and North America. This is the first study to demonstrate passive downstream dispersal (drift) of the round goby (Neogobius melanostomus) and tubenose goby (Proterorhinus semilunaris) in newly colonised areas (River Dyje, Danube basin), a factor that could play an important role in their dispersal. Drift duration (i.e. number of dates on which the species was caught) in round goby was longer than that of both native species and tubenose goby, providing a possible advantage. Size of drifting fish was restricted to a narrow range of 6–8 mm and 5–8 mm for round and tubenose goby, respectively. Drift in both species occurred almost completely during hours of darkness (<1 lux) and fish size did not vary throughout the night. In both species, drift density increased significantly during the first hour after dusk. Round goby density gradually decreased up to dawn, while tubenose goby density varied throughout the night with no clear pattern. Drift of early life stages appears to be an important phenomenon that has not received adequate attention in studies of round and tubenose goby ecology and dispersal.  相似文献   

应用RT-PCR方法检测水稻植株和介体昆虫体内的水稻齿叶矮缩病毒   总被引：3，自引：0，他引：3  

雷娟利  吕永平  金登迪  陈声祥  陈剑平 《植物病理学报》2001,31(4):306-309

 将生物学接种和RT-PCR检测水稻植株体内的水稻齿叶矮缩病毒的方法进行了比较,发现结果基本趋于一致,但总体上RT-PCR检测阳性率稍高于生物学接种的发病率。将生物学接种检测褐飞虱介体内水稻齿叶矮缩病毒方法与RT-PCR检测方法进行比较分析,发现RT-PCR方法可以检测单头褐飞虱体内的水稻齿叶矮缩病毒,具有很高的准确性和灵敏度。  相似文献   

A pharmacokinetic study including some relevant clinical effect of medetomidine and atipamezole in lactating dairy cows     

Ranheim B  Arnemo JM  Ryeng KA  Søli NE  Horsberg TE 《Journal of veterinary pharmacology and therapeutics》1999,22(6):368-373

Medetomidine is the most potent and selective alpha2-agonist used in veterinary medicine and its effects can be antagonized by the alpha2-antagonist atipamezole. The pharmacokinetics of medetomidine and atipamezole were studied in a cross-over trial in eight lactating dairy cows. The animals were injected intravenously (i.v.) with medetomidine (40 microg/kg) followed by atipamezole i.v. (200 microg/kg) or saline i.v. after 60 min. Drug concentrations in plasma were measured by HPLC. After the injection of atipamezole, the concentration of medetomidine in plasma increased slightly, the mean increment being 2.7 ng/mL and the mean duration 12.1 min. However, atipamezole did not alter the pharmacokinetics of medetomidine. It is likely that the increase in medetomidine concentration is caused by displacement of medetomidine by atipamezole in highly perfused tissues. The volume of distribution at steady state (Vss) for medetomidine followed by saline and medetomidine followed by atipamezole was 1.21 and 1.32 L/kg, respectively, whereas the total clearance (Cl) values were 24.2 and 25.8 mL/min x kg. Vss and Cl values for atipamezole were 1.77 mL/kg and 48.1 mL/min x kg, respectively. Clinically, medetomidine significantly reduced heart rate and increased rectal temperature for 45 min. Atipamezole reversed the sedative effects of medetomidine. However, all the animals, except one, relapsed into sedation at an average of 80 min after injection of the antagonist.  相似文献