国内玉米市场价格近期难以出现明显下跌

东北天气以晴为主。收购价格小幅波动近期，吉林省大部分地区仍以晴好天气为主，气温仍然较低，而新玉米收购价格仍有小幅波动，部分地区收购价格小幅上扬。当前，吉林蛟河地区收购水分在32％的新玉米收购价上涨20元/t至现在的800元/t，由于水分和价格偏高，所以粮商收购积极性较差。桦甸地区收购水分在28％～30％的新玉米，收购价集中在780～800元/t，     

山东鸡产品价格行情

3月中旬，黑龙江东部中等玉米出手价格（水分23％～22％）0．84～0．86元／千克，企业及粮食贸易商收购价格（水分23％～22％）0．92～0．94元／千克，烘干玉米（水分14％）车板价格1120～1140元／吨，比较3月初同期价格变化不大。目前收购商收购数量较前期明显下降，收购势头明显减弱。影响当前玉米市场主要因素：一是一些农户及家庭农场玉米出手数量已过大半，剩余数量已经不多，出售心态趋于平和；二是近期连续的雨雪天气，使各地玉米水分有所升高，     

国内玉米价格分析

2月中旬,国内产区玉米收购工作已经陆续开始,玉米价格保持坚挺上扬。黑龙江地区玉米价上涨10-30元／吨,收购价格为1980-2110元／吨,吉林玉米收购价维持在2110-2170元／吨,辽宁地区玉米收购价格2180元／吨。山东部分玉米收购企业每吨下调10-20元,深加工企业玉米收购价在2300-2350元／吨。河北报价2120-2180元。南方销区价格在2440-2570元／吨。北方港口玉米收购价格每吨小幅上涨5-10元,港口平仓价持稳于2310-2350元／吨。广东蛇口港玉米价格维持在2430元／吨。     

国内玉米市场行情北稳南跌

近期,国内玉米市场出现波动,南方销区市场受产区玉米到货数量增多,市场价格出现大幅跌落行情,跌幅空间达到130元/吨;在南方港口价格下跌的拉动下,北方价格也出现下调;虽港口玉米价格出现下调,然而产区市场陈玉米销售价格、新玉米收购价格却依然保持坚挺,新玉米收购形势堪忧。具体情况如下:　　(一)东北新产玉米收购价格基本稳定 近期,东北地区新产玉米收购价格基本稳定。农户节前售粮变现意愿增强,用粮单位预期后市玉米价格上涨,收购积极性也在不断提高。近期,吉林西部(松原)地区新产玉米平均农户收购价格为0.80元/千克,农户交售积极性较高…     

吉林玉米市场动态

吉林九台玉米收购价稳,走量加大。近期当地一家贸易商与外部签订一批2700t的贸易合同,价格较高,走货量增加。目前当地的玉米收购报价在1．144元／kg,水分为24％～25％之间。其价格已超过托市收购价格,但质量要求必须是一等或二等以上的。后期随着托市收购时间与数量临近,价格仍将保持坚挺。其他贸易粮无成交。     

两大饲料原料市场动态

玉米东北产区:进入7月份,东北农民手中玉米基本售空,粮食市场收购冷清,个体收购逐渐退出市场,大中型粮食企业少有收购。吉林扶余、农安等地站台挂牌收购价格为每吨(下同)1240元,但是,收购数量不大。目前,吉林省深加工企业只有长春大成和公主岭黄龙在收购玉米,收购价格分别为126     

国内大豆市场行情走势不容乐观

近日，东北部分地区国产新豆收购价格走低，黑龙江哈尔滨阿城地区油豆收购价格相对趋软，目前价格区间在2．57～2．60元／千克，水分在14％～15％之间。黑龙江拜泉地区大豆收购价格相对较为稳定，其中贸易商收购价格在2．52～2．54元／千克，当地油厂收购价格为2．66元／千克(含0．02元／千克的车费)。部分油厂收购开始放低对质量水分等质量要求。目前收购市场行情依然有下跌倾向，后期大豆市场如何发展，具体影响因素在于以下几方面：     

近期国内玉米价格相对持稳

一东北玉米收购价格继续稳定 近日东北地区玉米上市数量有所增加,但整体仍然处于较低水平,由于国家临时存储玉米托市收购政策尚未公布,收购市场显得较为沉闷,收购价格也基本保持稳定.     

东北玉米市场价格将继续坚挺向上

<正> 近期东北玉米市场购销活动较为活跃,内需和外贸形势均有所好转,另外目前东北地区农民玉米存量已降至较低水平,尤其是交通沿线地区符合质量标准玉米相对更少,且惜售心量仍然存在,玉米价格因此保持强势,具体情况如下: 近期由于吉林省普降大雨,乡村道路已经泥泞不堪,玉米短途运输受到影响,玉米收购工作十分滞缓,当地玉米深加工企业的日收购量也大幅下降到平时的1/4左右,但收购价格仍较平稳,据了解,目前公主岭大型企业玉米挂牌收购价1100元/吨,实际价格为1090元/吨(扣杂),出口玉米收购价格为1110元/吨,粮库出库价格为1110元/吨,车板价格为1120～1130元/吨,与前期基本持     

聚焦国内玉米市场值得关注的几个问题

1产区玉米出库积极,短期货源相对充裕 近期,我国南方销区由于受到饲料小麦替代影响,饲料企业玉米采购大多放慢。同时目前,正值关内冬小麦收购高峰期,而今年我国小麦同比增产,且质量好于去年,政府又制定了最低收购价格制度,收购资金敞开供应。以致今年农民出售小麦热情较高,粮库收购积极性也很大,这使目前关内粮食主产区的部分地区仓容存在一定的问题,为此这些粮库加快部分玉米出库力度,腾仓并库以便多收小麦。     

电感耦合等离子-质谱法测定饲料中钠、镁、铬、锰、铁、铜、锌、砷、硒、镉和铅

应用电感耦合等离子-质谱技术(ICP-MS),建立饲料中钠、镁、铬、锰、铁、铜、锌、砷、硒、镉和铅等元素的测定方法。对饲料样品的前处理方法、仪器工作参数和11种元素标准曲线进行优化;并以加标回收、分析方法比对和重复测试说明方法的准确性和精密性。方法在0～1 000 ng/ml范围内线性良好,仪器检出限为0.557 7～5.072 ng/ml,具有良好的精密度,其回收率在88.1%～104.4%之间,相对标准偏差小于5.0%。同时与原子吸收和原子荧光方法进行比对,测定结果相近。所建立的方法简单、快速,可替代原子吸收和原子荧光方法测定饲料中的11种金属元素,为饲料的质量控制提供理想的元素分析方法。     

Supplementation of broodmares with copper, zinc, iron, manganese, cobalt, iodine, and selenium

In experiment 1, 6 pregnant mares received a concentrate that contained a trace mineral premix that provided 14.3 mg Cu, 40 mg Zn, 28 mg Fe, 28 mg Mn, 0.08 mg Co, 0.16 mg I, and 0.16 mg Se/kg concentrate (group A). Seven mares received the same concentrate plus 502 mg Zn and 127 mg Cu once daily (group B). No differences (P > .05) in foal growth data, or Cu, Zn, and Fe concentrations of mare milk, mare serum, or foal serum were observed. In experiment 2, 6 pregnant mares received the same concentrate as group A (group C), and 8 mares received the same concentrate fortified with 4× the trace mineral premix (group D). Group C mares had higher serum Zn concentration at 1 day (P < 0.01) and 56 days (P < 0.04). Group C mares had higher milk Fe concentration at 28 days (P < .01), and group D mares had higher milk Cu concentration at 56 days (P < .01). Group C foals had higher serum Cu concentration at 14 days (P < .03). The results from this study provide no evidence to indicate that supplementing late gestating and lactating mares with higher dietary trace mineral levels than those recommended currently by NRC has any influence on foal growth and development, or on the Cu, Zn, and Fe concentrations of the mare milk, mare serum, or foal serum.     

Comparisons of Angus, Charolais, Galloway, Hereford, Longhorn, Nellore, Piedmontese, Salers, and Shorthorn breeds for weight, weight adjusted for condition score, height, and condition score of cows

Breed differences for weight (CW), height (CH), and condition score (CS) were estimated from records (n = 12,188) of 2- to 6-yr-old cows (n = 744) from Cycle IV of the U.S. Meat Animal Research Center's Germplasm Evaluation (GPE) Program. Cows were produced from mating Angus and Hereford dams to Angus, Hereford, Charolais, Shorthorn, Galloway, Longhorn, Nellore, Piedmontese, and Salers sires. Samples of Angus and Hereford sires were 1) reference sires born from 1962 through 1970 and 2) 1980s sires born in 1980 through 1987. The mixed model included cow age, season of measurement and their interactions, year of birth, pregnancy-lactation code (PL), and breedgroup as fixed effects for CW and CS. Analyses of weight adjusted for condition score included CS as a linear covariate. The model for CH excluded PL. Random effects were additive genetic and permanent environmental effects associated with the cow. Differences among breed groups were significant (P < 0.05) for all traits and were maintained through maturity with few interchanges in ranking. The order of F1 cows for weight was as follows: Charolais (506 to 635 kg for different ages), Shorthorn and Salers, reciprocal Hereford-Angus (HA) with 1980s sires, Nellore, HA with reference sires, Galloway, Piedmontese, and Longhorn (412 to 525 kg for different ages). Order for height was as follows: Nellore (136 to 140 cm), Charolais, Shorthorn, Salers, HA with 1980s sires, Piedmontese, Longhorn, Galloway and HA with reference sires (126 to 128 cm). Hereford and Angus cows with reference sires were generally lighter than those with 1980s sires. In general, breed differences for height followed those for weight except that F1 Nellore cows were tallest, which may in part be due to Bos taurus-Bos indicus heterosis for size.     

液相色谱-串联质谱法测定动物尿液中11种β-受体激动剂残留量的不确定度评估

采用液相色谱-串联质谱法测定动物尿液中11种β-受体激动剂残留量,对标准溶液、体积、质谱峰面积、浓缩过程及回收率等测定不确定度因素进行了分析,通过评定各不确定度分量及标准不确定度,得出11种β-受体激动剂的扩展不确定度在0.7 ～ 1.1 ng/mL范围内.由各因素对合成不确定度的贡献比分析可知,影响较大的因素为试验回收率及标准溶液浓度.