重庆中央公园植物配置特色及建议     

丁志祥  阎应红  易婧  敬廷桃  姚永红 《南方农业》2018,(4)

位于重庆两江新区同茂大道和节庆大道的重庆中央公园,为世界三大开放式城市中心公园之一。从充分利用乡土植物、注重植物空间层次搭配、比较重视色叶植物的运用、运用较多的地被植物、大型景观树有运用几个方面总结该园植物配置特色和亮点。针对现场观察到的问题,提出建议:政府持续重视,开展科研工作,改进植物配置。  相似文献   

根系育种的新动向     

Gorny  AG 张海峰 《国外农学:麦类作物》1991,(4):8-11

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荔枝的保色贮藏法     

丁志祥 《西南园艺》1995,(4)

荔枝为果中珍品,但保鲜难度极大,熟果在常温下存放3—5天即发生褐变、干缩或腐败,商品价值大大降低。通用的简便贮藏方法有两种:1、低温加限气贮藏法杀菌后的荔枝装入保鲜袋,密封袋口,置于1—5℃低温环境下贮藏;2、坛藏法杀菌后的荔枝装入坛内(坛口要小),密封坛口,埋于阴凉通风处的沙土中。2法的原理同1法  相似文献   

Myeloma and atomic veterans     

Lazen AG 《Science (New York, N.Y.)》1983,222(4620):120

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Magnetic flux transport on the sun     

Wang YM  Nash AG  Sheeley NR 《Science (New York, N.Y.)》1989,245(4919):712-718

Although most of the magnetic flux observed on the sun originates in the low-latitude sunspot belts, this flux is gradually dispersed over a much wider range of latitudes by supergranular convective motions and meridional circulation. Numerical simulations show how these transport processes interact over the 11-year sunspot cycle to produce a strong "topknot" polar field, whose existence near sunspot minimum is suggested by the observed strength of the interplanetary magnetic field and by the observed areal extent of polar coronal holes. The required rates of diffusion and flow are consistent with the decay rates of active regions and with the rotational properties of the large-scale solar magnetic field.  相似文献   

Relative efficacy of organophosphorus insecticides against susceptible and resistant strains of the strike blowfly Lucilia cuprina (Calliphoridae) in New Zealand sheep     

Wilson JA  Heath AC  Stringfellow L  Haack NA  Clark AG 《New Zealand veterinary journal》1996,44(5):185-187

Four groups of five Romney lambs were treated by plunge dipping with one of four registered organophosphorus flystrike preventatives. Untreated lambs acted as controls. The sheep were challenged at weekly intervals with larval implants of organophosphate-susceptible and -resistant strains of Lucilia cuprina. All four treatments provided 19-21 weeks protection against susceptible larvae but chlorfenvinphos provided the longest protection (16-17 weeks), followed by propetamphos (15-16 weeks), dichlofenthion (10-13 weeks) and diazinon (9-13 weeks), against the resistant strain.  相似文献   

Eosinophilic papulocrustous dermatitis (miliary dermatitis) and eosinophilic inflammatory bowel disease in two cats     

Bell AG  Chard WG  Grayson JL  James MP 《New Zealand veterinary journal》1995,43(4):153-157

Two cats with chronic eosinophilic skin disease were investigated. The clinical investigation of the skin disease in one cat was limited and inflammatory bowel disease was diagnosed post mortem. A history of weight loss and a palpably thickened bowel in the second cat suggested concurrent gastrointestinal disease. Diagnosis of inflammatory bowel disease was confirmed on biopsy. Treatment with azathioprine and methylprednisolone acetate resolved the signs of gastrointestinal disease, the pruritus and 95% of the skin lesions. The concurrence of eosinophilic papulocrustous dermatitis and eosinophilic bowel disease raises the possibility of their being linked bv a common aetiology or pathophysiology.  相似文献   

Gulf stream: velocity fluctuations during the late cenozoic     

Kaneps AG 《Science (New York, N.Y.)》1979,204(4390):297-301

Biostratigraphic analysis of seven piston cores from the southeastern Blake Plateau suggests that the upper Miocene to Recent sedimentary section at this location represents a history of deposition of calcareous ooze alternating with current-induced nondeposition or erosion. This record is primarily a result of long-term fluctuations in the velocity of the western boundary current or Gulf Stream, which sweeps the plateau. High-velocity phases of this current system, as signaled by hiatuses in the section, lie within the time limits 4.8 to 6.1, 3.9 to 4.4, 2.3 to 2.9, and 0 to 1.5 million years before present (B.P.). These time intervals are coeval with dated episodes of climatic decline and glaciation. The most intense acceleration of the Gulf Stream, as indicated by deep erosion of the Blake Plateau, occurred in the latest Miocene to earliest Pliocene (4.8 to 6.1 million years B.P.) in conjunction with a major expansion of the Antarctic ice cap. Subsequent accelerations of the Gulf Stream coincide with early Pliocene cooling in the Southern Hemisphere, worldwide expansion of high-altitude-high-latitude glaciers in the late Pliocene, and the classical glaciations of the Pleistocene. An additional, protracted increase in the average velocity of the Gulf Stream, which began in the late Miocene and culminated in the mid-Pliocene (about 3.8 million years B.P.), can be attributed to the gradual emergence of the Central American isthmus.  相似文献   

安远县委县政府鼓励全县干部职工兴办果业     

丁志祥 《西南园艺》2003,31(1)

江西省安远县种植脐橙有得天独厚的土壤、气候优势 ,种植脐橙历史长 ,且质量好。迄今为止 ,已发展脐橙 1.1万ｈｍ2 以上 ,为江西省脐橙生产第一大县。县委县政府为了鼓励全县干部职工兴办果业和推动无公害脐橙产业的发展 ,2 0 0 2年相继出台了安字 [2 0 0 2 ]33和 5 2号文 ,主要内容有 :(1)县直一、二级行政事业单位和乡 (镇 )机关及其站 (所 )的在职干部职工全部列为参与对象。(2 )副科级 (含副主任科员 )以上领导干部 ,每人必须开发无公害脐橙园 1.33ｈｍ2 (2 0亩 )以上 ;一般干部职工 ,要求投资开发无公害脐橙园 0 .6 7ｈｍ2 (10亩 )以上…  相似文献   

铁和碳酸氢钠双重胁迫对柑橘砧木叶片色素和矿质营养的影响   总被引：4，自引：0，他引：4  

谢永红  吕斌  陈学年  丁志祥  欧毅 《西南园艺》2003,31(4):1-3

在铁(Fe)和碳酸氢钠(NaHCO3)双重胁迫下，枳、红橘和资阳香橙叶片中叶绿素a、b和类胡萝卜素含量下降程度均大于单因子胁迫。叶绿素a／b随着胁迫的加重而呈升高趋势。在单一高含量NaHCO3和Fe--NaHCO3胁迫下，叶片中Na^ 含量大幅升高，K^ 、Fe含量明显降低，而且Fe有效性下降。资阳香橙对Fe和NaHCO3胁迫的耐受能力好于红橘，枳最差。  相似文献