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今年上半年豆粕市场整体呈现先抑后扬的运行趋势。第一季度豆粕市场整体表现偏弱。尽管北美大豆库存偏紧以及南美大豆产量向下修正的双重支撑,美豆整体重心上移。但国内终端养殖业惨淡,油厂亏损严重,豆粕现货价格跌势较为明显,市场整体呈现“外强内弱”。 相似文献
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进入2004年以来,国内豆粕行情可谓一波三折。由于进口原料成本高,而且大豆开工率严重降低,豆粕供应紧张成为决定行情的主要因素。第一季度国内豆粕市场行情整体强势逼人,而连豆和连粕市场也联袂走强。但是随着南美大豆收获进入高峰期,世界大豆市场供应呈现季节性增长,特别是南美大豆和美国大豆的巨大价差,使得最终用户在南美大豆即将运抵之前,普遍存在观望等待心理。进入4月份以来,国内豆粕期货市场在短暂冲高后就一路暴跌,以大连商品交易所2004年8月交货的豆粕期货为例,4月5日的收盘价格为3773元,而4月12日的收盘价格为3485元,短短不到两周… 相似文献
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<正>10月进口大到港量较前期明显减少,而下游养殖需求有所回暖,国内豆粕现货出现局部性紧张的局面。短期内豆粕或将高位震荡,至美豆集中到港后豆粕将向下调整。10月是美国大豆收割及南美大豆播种的季节,美国产区降雨阻碍大豆收割,南美产区天气不利于大豆播种,使得美国大豆收割进度均低于往年平均水平。自6月下旬一直炒作的丰产压力也逐渐淡化,10月供需报告中的美国大豆单产量及产量继续上调,而期末库存有所下调,CBOT大豆期价震荡上扬。 相似文献
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2013年上半年豆粕市场延续震荡行情,国内外豆类市场呈现先抑后扬、粕强油弱局势。市场多空因素加剧市场波动,一方面南美大豆丰产预期限制豆类价格上涨空间;另一方面新季大豆种植面积小幅增加,给市场带来利空影响。虽然从全球大豆产量来看,供应格局较为宽松,但由于巴西港口运输已经拥堵近3个月,中国企业购买 相似文献
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2020年注定是不平凡的一年。新冠疫情冲击全球政治与经济,同时也对全球农业生产以及贸易造成严重影响。而豆粕市场全年大部分时间走势震荡,进入9月份以后随着美豆大涨,成本驱动市场信心终于增加,豆粕价格跟随美豆震荡走高,但是涨幅却远小于美豆市场。当前市场焦点聚焦于南美大豆产区,拉尼娜确认之下,同时新冠疫情仍在蔓延,美国的大量印钞,造成人民币对美元大幅升值,适于国内进口,引发南美和北美大豆库存大幅下降,对美豆的涨势起到推波助澜的作业。未来市场仍将继续关注供应端带来的炒作机会。国内生猪复养也渐入高潮,需求端的利多更是加固豆粕的强势。 相似文献
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2022年春节过后,国内蛋白粕市场价格,在南美干旱加剧和俄乌战争爆发的双重加持下,出现近十年以来再度冲击历史新高的局面.
在供给方面,油厂的大豆和豆粕库存继续下降,且豆粕的库存水平处在历史低位.进口大豆由于2022年第一季度到港量低于往年,呈现紧张状态,国内油厂压榨量受此影响,多地出现断豆停产局面,对豆粕现货价格产生明... 相似文献
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春节前后，由于全球大范围内出现禽流感疫情，对CBOT黄豆及国内的大豆现期两市场均产生了极为不利影响．加上南美大豆产区天气良好及国内豆粕消费处于淡季，由此终结了2005年12月的反弹上涨行情，廷续长期下跌趋势，期价再次进入震荡走低寻求支撑的通道（图1）。但通过以下分析．笔者对全球大豆市场第2季度的走势抱着乐观的态度．认为大豆价格震荡整理后将会出现反弹行情。 相似文献
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利用B型超声波诊断仪,对繁殖季节和非繁殖季节母马卵泡发育过程进行连续观察,揭示母马卵泡生长发育的动态模式。在繁殖季节的5—7月随机选取5匹空怀和4匹排卵后配种妊娠的伊犁马为监测对象,在非繁殖季节的8—10月随机选取8匹空怀伊犁马为监测对象,用B型超声波诊断仪每日或隔日扫描两侧卵巢1次,记录卵泡数量并测量卵泡直径,分别持续观测一个发情周期和40 d。结果表明,母马在繁殖季节的一个发情周期内有1～2个卵泡波;在非繁殖季节,马卵巢也有卵泡波的变化;母马不是严格的季节性发情动物。 相似文献
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利用夏季自然发情的云南黄牛为受体,开展了奶牛体内冷冻胚胎移植。留用的114头受体牛中,本地黄牛59头,年龄在3~10岁,均为经产牛,最终移植27头,西杂牛56头(其中2岁以下的青年牛26头),移植29头(青年牛11头),两个品种受体利用率分别为45.8%和51.8%;移植后妊娠率分别为59.3%和55.2%;解冻的63枚胚胎移植给了56头受体牛,A级胚胎单独移植和B、C级胚胎搭配移植最终妊娠结果分别是58.5%(24/41)和53.3%(8/15);发情后第6 d和第7 d移植妊娠率分别为56%和58.1%。结果表明,1~10岁的西杂牛和3~10岁体型较大的本地黄牛均可作为受体移植奶牛胚胎;利用自然发情的云南黄牛做受体移植效果较为理想,是一种经济、方便、适合云南广大农村推广的技术途径;A级胚胎单独移植和B、C级搭配移植可获得较为理想的妊娠结果;处于发情后第6 d和第7 d的云南黄牛都可以作为桑囊期奶牛胚胎的移植受体。 相似文献
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江苏省射阳县洋马镇现有桑园２２０ｈｍ２,年饲养蚕种近万张 ,是该县重点蚕桑基地乡镇之一。２００１年１０月２０日 ,正值晚秋蚕５龄期 ,该镇港中村近６０００张蚕种出现不结茧蚕 ,约占洋马镇饲养总量的１５% ,其发生规模及损失严重程度为历史所罕见 ,一时蚕农反映强烈 ,不少业内人士也感愕然。鉴此 ,我站迅即派员会同盐城市蚕桑站赶赴洋马镇实地调查 ,为切实保护蚕农利益和慎重行事 ,并邀请中国农业科学院蚕业研究所、省蚕种产品质量鉴定委员会的专家组成调查鉴定小组 ,展开细致缜密的调查 ,最终确认发生大量不结茧蚕和薄皮茧 ,是由多种因… 相似文献
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张国模 《青海畜牧兽医杂志》2012,(4):18-19
本试验以1岁、2岁公牛和成年母牦牛为研究对象,了解冷季补饲对放母牦牛生产性能的影响。试验选取1岁、2岁公牛和成年母牦牛各20头,不同年龄的牦牛均随机平分为试验组和对照组。试验时间为2010年10月13日～2011年4月30日,共计183d。结果试验组1岁牛总增重-2.31kg,增重率为-2.53%。夏季平均体重116.53kg,增重25.17kg,增重率为21.60%。对照组1岁牛总增重-14.17kg,增重率为-18.34%。夏季体重90.36kg,增重13.11kg,增重率为14.51%。试验组2岁牛总增重-8.11kg,增重率为-6.00%。夏季体重178.55kg,增重43.44kg,增重率为24.33%。对照组2岁牛总增重-14.17kg,增重率为-18.34%。夏季体重147.61kg,增重24.27kg,增重率为16.44%。试验组成年母牛总增重-43.37kg,增重率为-24.16%。夏季体重208.44kg,增重25.17kg,增重率为21.60%。对照组成年母牦牛总增重-50.81kg,增重率为-22.42%。夏季体重188.11kg,增重32.79kg,增重率为17.43%。结果表明冷季补饲有助于放牧牦牛生长发育。 相似文献
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T. Soveri 《Anatomia, histologia, embryologia》1993,22(4):313-318
Seventeen reindeer calves were divided into three groups and liver biopsies were taken during the winter. Group 1 consisted of 6 animals allowed to graze freely under natural conditions, those in groups 2 (n = 5) and 3 (n = 6) were kept in pens and fed with lichens, the diet being designed to achieve a slight (group 2) or moderate (group 3) weight loss. Weight losses from November to April averaged 14.9%, 13.2% and 24.8% in the three groups respectively. The relative volumes of the different structures in the liver were determined by light microscopic morphometry. The mean size of the hepatocytes was slightly greater in March than in January in groups 1 and 2, and slightly smaller in group 3 (no statistical differences) and then decreased markedly. These changes could also be seen in the sinusoidal lumina. The decrease in the size of the hepatocytes may reflect a shortage of amino acids in the cells or it may be hormone-mediated. Unlike the situation in cows, there was no fatty accumulation in the hepatocytes. This may be a species adaptation to an annual period of starvation. 相似文献
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作者通过对夏秋蚕布局现状及存在的问题的分析，提出了布局调整意见，夏蚕适当增加，取消早秋蚕，调整“二秋”发种日期和饲养比例。 相似文献
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Jiménez-Severiano H Quintal-Franco J Vega-Murillo V Zanella E Wehrman ME Lindsey BR Melvin EJ Kinder JE 《Journal of animal science》2003,81(4):1023-1029
The objective of the present study was to evaluate the secretion of testosterone (T) in bulls in response to the administration of varying doses of bovine LH (bLH) during the four seasons of the year. Five adult bulls (4 yr of age) were treated with an amount of bLH that was estimated to induce a 5 ng/mL amplitude pulse of LH in blood serum on five consecutive days around the spring equinox, summer solstice, fall equinox, and winter solstice. Five hours after this dose, bulls were treated with bLH in amounts that were estimated to induce a 0.25, 0.5, 1, 2, or 4 ng/mL amplitude LH pulse in blood serum in a Latin square design. Blood samples were collected for 5 h after administration of a dose of bLH that was estimated to induce the 5-ng amplitude LH pulse, and for 3 h after administration of the variable doses of bLH, and were then assayed for concentrations of T. Average concentrations and amplitude of T release after doses of bLH that were estimated to induce the 5-ng amplitude LH pulses were greater during the spring and summer than during the winter (P < 0.05). The area under the release curve (AUC) was greater during the spring than during the winter (P < 0.05). During the 3 h after treatment with the variable doses of bLH, T response was affected by dose (P < 0.001) and season (P < 0.001), but there was no dose x season interaction. Testosterone response increased in a dose-dependent fashion for all variables studied. The greatest average concentrations of T and AUC were observed in the spring compared with the fall and winter (P < 0.05). These data support our working hypothesis that testes of bulls are more responsive in releasing T in response to bLH stimulation in the spring and summer compared with the winter; however, there were no changes in sensitivity of the testes to LH during different seasons of the year as indicated by the lack of a dose of bLH x season interaction. 相似文献