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以‘黄金’黄果西番莲为材料,研究黄果西番莲冬果果实生长发育规律,结果表明：黄果西番莲冬果果实生长发育时间共计84d,质量增长曲线呈单“Ｓ”型,果实质量快速增长时期为谢花后14-21 d;果实纵径和横径增长曲线基本相同,均呈单峰曲线,果实迅速膨大时期为谢花后21 d,果实横径生长稍大于纵径生长,果实由椭圆形逐渐变为近圆形;谢花后35 d,果腔内产生果汁,果汁可溶性固形物含量变化曲线呈单“Ｓ”型,可溶性固形物含量迅速增加时期为谢花后56-63 d。 相似文献
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定期测量染色体加倍型翠冠梨芽变的新稍长度、叶片与果实的纵径横径,观测芽变的植物学性状、物候期及生长结果特性。结果表明,芽变的果实表面具有不规则的纵向棱,物候期提前,新梢及叶片生长量明显提高,果实纵横径变大,硬度提高,单果重显著增大。与对照相比,果实成熟期提早了16d;新梢长度增加18.4﹪;叶片纵横径分别大7.3﹪和12.8﹪;果实纵横径分别增大14.1﹪和14.7﹪;单果重增加15.9﹪。 相似文献
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以‘金艳’猕猴桃为材料,研究其果实生长动态规律及不同采收期(谢花后153 d、168 d、183 d和198 d)(Ⅰ、Ⅱ、Ⅲ、Ⅳ)的软果品质。结果表明：金艳猕猴桃在凉山州西昌市一般4月中旬进入盛花期;在生育期内,果实尺寸(纵、横径)呈前期逐渐增大,后期趋于平稳的变化,谢花后59 d内为果实快速膨大期,谢花后101 d进入生长缓滞期;随采收期延迟,果实软熟时可溶性固形物、干物质和糖酸比呈逐渐升高的趋势;早期采收(Ⅰ、Ⅱ)果实软熟时可溶性固形物、干物质、糖酸比和总氨基酸偏低,淀粉和粗纤维较高;晚期采收(Ⅲ、Ⅳ期)果实软熟时可溶性固形物、干物质、糖酸比较高,淀粉和粗纤维较低,风味更浓,口感更佳;Ⅳ期维生素C和总氨基酸含量最高,但采收较晚不利于当年鲜果销售;若作为鲜果,其最佳采收期为Ⅲ期,Ⅱ期和Ⅳ期可作为备选采收期;作为保健品加工原料,最佳采收期为Ⅳ期。 相似文献
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通过分析比较来自三个不同种植栽培区域不同品种的百香果果实,研究了其纵径、横径、单果重及可溶性糖含量等性状表达对在不同栽培区域环境的响应效果表现。结果表明,大黄金在大田镇露地种植的果实表现最优,果实纵径、横径、单果重和可溶性糖含量均最大,其中平均单果重达116.5g,可溶性糖含量达17.1%;满天星在细水乡种植地的果实性状最佳,果实纵径、横径、单果重均最大,可溶性糖含量较高（15.8%）。不同区域的小黄金和台农果实性状表达差异较大：小黄金在大田镇露地种植的果实纵径、横径和单果重均最大,而可溶性糖含量（16.7%）极显著小于两院种植的果实（18.0%）。台农在细水乡种植的果实性状表达显著优于其他种植区域,果实纵径、横径、单果重和可食率均显著或极显著高于另外2个种植栽培区域的果实,可溶性糖含量最高（17.7%）。综上,这三个区域反季节种植的大黄金和满天星果实综合表现较优,小黄金和台农稍差些。 相似文献
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本文以‘金果’猕猴桃为材料,研究自然生长果与CPPU处理果生长动态规律及不同采收期软果品质(盛花后162d、172d、182d、192d、202d和212d采摘,分别记为Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ、Ⅵ)。结果表明：2019年和2020年膨大剂(CPPU)处理使金果猕猴桃单果重平均提高1.40倍,膨果组单果重平均为102.98 g。膨大剂可提高糖酸比,口感由酸甜味转为甜味;可使采收期提前;可提高维生素C含量,降低总氨基酸和粗纤维含量。‘金果’猕猴桃攀西引种栽培生长期可分为快速膨大期(盛花后60d内)、缓慢增长期(盛花后60~123d)和生长停滞期(盛花后123~193d)。建议自然生长组盛花后192 d(Ⅳ期)左右采摘,膨果组盛花后182~192 d(Ⅲ~Ⅳ期)采摘。‘金果’猕猴桃采摘时可结合可溶性固形物(9~10%)和果肉颜色(黄色)综合判断。 相似文献
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Beran GW 《Preventive veterinary medicine》2008,86(3-4):198-207
When early people made their appearance, zoonotic infectious diseases were already waiting, but epidemic diseases did not appear in human history until people began to live in large numbers under conditions of close contact, mainly during the last 10,000 years. Disease has decimated urban populations, conquered armies, and disrupted society. The focus here is on (1) the plague of Athens and the Black Death; (2) smallpox, influenza, and rabies; (3) avian influenza prion diseases, and foot & mouth disease; and (4) emerging and re-emerging diseases. All have veterinary public health associations. In Athens, Greece, in 430 BC, when the Spartans ravaged the countryside, hordes crowded into Athens so that orderly movements, space in which to live, and adequate supplies of food became impossible. Crowding of any population fosters disease transmission; chaos and disorder enhance it all the more. Out of northern Egypt came a terrible plague from across the Mediterranean Sea. The identity of the plague of Athens remains unsure, but the well-considered conclusion is Rift Valley Fever, a mosquito borne, viral zoonosis. The Black Death, also called the Plague, raged in Asia for centuries. In 1347, the Black Death was brought by a ship out of Asia to Sicily. The scenes of devastation were repeated throughout Europe, with 90% or more of the people dying in city after city. Influenza, too, has been a cause of periodic human epidemics, but the great pandemic of influenza occurred in the last months of World War I. In the years of highest occurrence, more than half the world's population became clinically infected. If veterinary public health had been born earlier, it could have led to elucidating the epidemiology of influenza and the plagues of Athens, Europe, and Asia. In turn, smallpox had also caused continual tragedy. In 1796, Edward Jenner began to harvest pustules of cowpox from children or infected cows and inject them into susceptible children. In 1980, the World Health Organization declared that smallpox had been eliminated from the world. Rabies, though, still strikes terror. A number of animal diseases, broadly termed emerging and re-emerging diseases, need surveillance because they have the potential to impact human health. From late in 2003 to 2007, the highly pathogenic H5N1 influenza virus in poultry infected at least 121 people and caused 62 deaths in four countries. The prion diseases, too, all have very high numbers in concentrated contacts. To control these diseases, veterinary public health is essential, with diagnosis, epidemiological surveillance, clinical manifestations, and prevention as primary measures. 相似文献
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Dekker A Dercksen D Snoep J van Wuyjckhuise L 《Tijdschrift voor diergeneeskunde》2007,132(18):695-701
On 26th of july 2007 a new case of bluetongue was notified in the Netherlands and on 2nd of august 2007 foot-and-mouth disease was diagnosed in Surrey, England, which raised the threat of having both infections simultaniously in one area. Bluetongue and foot-and-mouth disease have a different pathogenesis, but symptoms may resemble each other at a later stage of infection. The pathogenesis and possible clinical symptoms of both infections are discussed and illustrated with pictures. 相似文献
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在动物的异常行为中以刻板行为最为常见,而咽气癖又是马最常见的口部刻板行为之一。作者就咽气癖在生理方面和心智方面对马体产生的影响、行为基础、诱因的研究进展及常见的防治措施进行综述。 相似文献
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近几年,世界饲用添加剂市场增长较快,预计今后将进一步增长,据世界粮农组织(FAO)首领会议的倡议,到2015年,将使世界营养不良的人口削减一半,其间,肉制品将会以每年2％的速度增长,特别是加快猪肉和禽肉增长。这将促进世界添加剂,尤其是蛋氨酸和赖氨酸需求量的增加。 相似文献
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