黑龙江省三江湿地水禽最新消息

1999年5月中旬,笔者对黑龙江省长林岛自然保护区和雁窝岛自然保护区进行了为期两周的调查。两个保护区均在三江平原腹地挠力河、七星河流域,宝清县境内,为同一块湿地,且连成一片。长林岛自然保护区地理位置为46°37′~46°49′N,132°42′~132°45′E,,总面积为10000hm~2。雁窝岛自然保护区地理位置为46°40′~46°48′N,132°     

巴里坤县草地蝗虫的防治对策

1概况巴里坤哈萨克自治县是新疆维吾尔自治区东北部的一个边境县,位于天山山脉东段与东准噶尔断块山系之间的草原上,地理坐标为东经91°19′30″～94°48′30″、北纬43°21′～45°5′19″,东     

木垒县草场鼠害发生原因与防治对策

<正>1木垒县概况木垒哈萨克自治县位于天山东段北麓,准噶尔盆地东南缘。地理位置介于东经89°51′～92°19′、北纬43°14′～45°15′。土地总面积22171km2,合221.71万hm2、其中牧业用地160.85万hm2、农业用地7.50万hm2、林业用地9.77万hm2、     

吕梁市蜂群越冬存在的问题与对策

<正>一、吕梁市蜂群越冬期间的气候特点吕梁市位于山西省西部,北接忻州,南衔临汾,东隔汾河与晋中一依带水,西跃黄河即达陕西省。其地理位置介于东经110°22′12″¹12°19′27″,北纬36°43′52″112°19′27″,北纬36°43′52″³8°43′54″之间。全市总面积21143 km2,包括汾阳、孝义、文水、离石、柳林、临县、兴县、岚县、方山、交口、中阳、石楼等13个县市区160个乡镇。吕梁市冬季气候特点是寒冷,降雪稀少。寒冷的冬     

德宏水牛对农村贡献调查分析

1 概况盈江县地处祖国西南边陲,位于云南省西部、德宏州西北部,东经97°31′～98°16′,北纬24°24′～25°20′.     

江永香柚

1地域范围包括江永县粗石江镇、桃川镇、沅口瑶族乡、夏层铺镇、允山镇和潇浦镇等6个乡镇。江永县位于湖南省南部,永州市南部,地理位置为东经110°57′20″～111°41′15″,北纬24°55′35″～25°29′40″,海拔183～1 951 m。东部与江华瑶族自治县为邻,东南部与广     

土默特右旗天然草地类型与利用

土默特右旗位于大青山西段南侧,包头市东部。处在北纬40°14′38〃—40°51′06〃,东径110°14′32〃—111°07′02〃之间。北与包头市固阳县、乌兰察布盟武川县接壤,东邻呼和浩特市土默特左旗和托克托县,西接包头市郊区,南以黄河为界与伊克昭盟准格尔旗、达拉特旗隔河相望。总土地面积23.6万公顷。     

青海恰卜恰地区猪蛔虫感染情况调查

猪蛔虫是寄生于猪小肠的一种世界性分布、感染普遍、对养猪业危害严重的消化道蠕虫。为了解恰卜恰地区目前生猪蛔虫感染情况,我们进行了调查,调查情况报道如下。1基本概况恰卜恰镇位于共和盆地东部,地理位置介于东经100°24′～100°42′、北纬36°05′～36°32′之间,地     

浅谈平凉牛产业的可持续发展

1 平凉自然概况和养牛现状 平凉市位于甘肃省东部,陕、甘、宁三省(区)交汇处,地处北纬34°54′-35°43′,东经108°30′-107°45′之间,是古"丝绸之路"必经重镇,素有陇上"旱码头"之称.     

亳州畜禽粪污资源化利用做法

正一、基本情况安徽省亳州市辖涡阳县、蒙城县、利辛和谯城区"三县一区",位于东经115°53′-116°49′、北纬32°51′-35°05′,属黄淮海平原地带,辖境与黄河决口扇形地相连,国土总面积8521平方千米,耕地899.3万亩,土壤主要是砂姜黑土,     

不同肉用品种牛与新疆褐牛最佳杂交组合筛选试验

新疆褐牛是我国自主培育的乳肉兼用品种,具有耐寒、耐粗饲、适应性和抗逆性强、适宜草原放牧等特性。试验选择新疆褐牛（BD）与肉用品种牛——南德温牛（ND）、红安格斯牛（AG）、肉用西门塔尔牛（XM）进行经济杂交,以确定其是否可以表现出明显的杂种优势和很好的配合力。结果表明,ND×BD组出生重较其他2组高,AG×BD组出生重最低;随着月龄的增加,AG×BD组的体重迅速增加,表现为生长早期强势发育,但随着月龄的不断增加,从6月龄开始,AG×BD组与其他2组体重逐渐接近;到12月龄时,AG×BD组胸宽显著高于其他2组,但其他指标没有差异。试验显示,最佳杂交组合为ND×BD组,其次为AG×BD组,最后为XM×BD组。     

新疆褐牛和中国荷斯坦牛POU1F1基因第六外显子多态性与产奶量的关联分析

以新疆褐牛和中国荷斯坦牛为研究对象.应用PCR-RFLP方法对POU1F1基因第6外显子的多态性及其与产奶量的相关性进行了分析.结果表明,新疆褐牛和中国荷斯坦牛的群体在该位点分别有2种等位基因(A/B),频率分别为0.43/0.57和0.33/0.67.B等位基因是优势等位基因.在新疆褐牛群体中,BB型个体的产奶量显著高于AA型(P<0.05).     

Seroprevalence of enzootic bovine leukosis in Trakya district (Marmara region) in Turkey

In this study, 481 cattle belonging to 77 farms from nine localities in Trakya district in the Marmara region of Turkey were blood sampled and serologically tested for enzootic bovine leukosis (EBL). Antibodies to bovine leukosis virus (BLV) were detected in 51 cattle sera (11%) belonging to nine farms in five localities. Cattle tested were mostly female Holstein or Brown Swiss of ages ranging between 18 months and 10 years. Analysis of the relationships between age, breed or sex and seropositivity to EBL in seropositive herds indicated no significant associations (p>0.05). The relationship between seropositivity and haematological changes was also studied, and seropositive cattle had higher lymphocyte percentage and lower neutrophil percentage than seronegative cattle (p<0.001).     

新疆褐牛,中国荷斯坦POU1F1基因第六外显子多态性与产奶量关联分析

[目的]为了研究POU1F1基因第六外显子多态性与产奶量的关系.[方法]以新疆褐牛,中国荷斯坦为研究对象,利用PCR-RFLP对POU1F1基因第六外显子的多态性及其与产奶量的相关性进行了分析.[结果]表明: 新疆褐牛,中国荷斯坦牛的群体在该位点分别检测到2种等位基因A/B,频率分别为:0.43/0.57,0.33/0.67,B等位基因是优势等位基因 .[结论]在新疆褐牛群体中,BB型个体的产奶量显著高于AA型,在荷斯坦奶牛中BB型比AA,AB型的产奶量高,但差异不显著.     

利木赞牛改良大别山黄牛效果初报

木文探讨了用利木赞牛冷冻精液改良大别山黄牛的效果。经测定。杂交一代的初生体尺和生长速度明显优于本地大别山黄牛。试验表明，杂交一代不仅能保持本地大别山黄牛的优点，同时还弥补了母本体躯不丰满、增重速度慢的缺点，说明利用利木赞牛作为父本改良本土大别山黄牛效果显著，杂交组合理想，利本赞牛可作为大别山黄牛改良的父本品种使用。     

荷斯坦奶牛耐热性状的分子遗传标记研究

选取高产荷斯坦牛10头，优化奶牛RAPD反应最佳体系，并在154条随机引物中筛选出稳定性好、带型清晰的引物64条。结合红细胞钾测定结果和生产性能测定，通过RAPD分析并筛选出3个与奶牛耐热性状相关的分子标记，以期应用这些分子标记进行高产耐热荷斯坦奶牛的选育工作。     

辽育白牛与其他5品种(杂种)肉用牛持续育肥体量增长对比试验

辽育白牛是辽宁省培育的肉牛新品种,为了测试辽育白牛的肥育性状,并与辽宁地区其他主要品种(杂种)肉牛进行比较,辽宁省牛育种中心开展了育肥试验.200 kg辽育白牛公犊断奶后持续育肥12个月,增重384.22 kg,平均日增重1067.28 g;再持续育肥4个月,增重为107.80 kg,平均日增重898.33 g.在整个育肥期,辽育白牛皆显现出优越的肥育性能.结果表明,辽育白牛生长速度快,与其他5个品种(杂种)肉牛相比,具有更好的肥育性能,推广应用前景广阔.     

Additive and heterosis effects on preweaning traits, maternal ability and reproduction from crossing of the Angus and brown Swiss breeds in Florida

Angus (A), Brown Swiss (S) and A X S reciprocal F1 (AS) dams were mated to A, S and AS (also reciprocal F1) sires resulting in nine breed groups of progeny with varying proportions of Angus and Brown Swiss breeding. Breed group of dam and of sire significantly influenced birth weight, preweaning daily gain, weaning weight, 205-d weight, condition score and frame size. The means for birth weight and weaning weight were 33 and 213 kg, respectively. Brown Swiss bulls sired calves with the heaviest birth and weaning weights. Calves produced by S dams likewise were heavier at birth and weaning. Pregnancy rates were influenced significantly by year, age and breed of dam and averaged 79, 95 and 92% for S, AS and A cows, respectively. Survival rate averaged 97% and was not influenced significantly by any of the effects examined. Because survival rates were similar for all breed groups, the results for weaning rate paralleled those for pregnancy rate. Genetic influences on preweaning growth traits and survival rate were partitioned into additive breed differences (B) and heterosis (H) effects for direct (d) and maternal (m) components. Pregnancy and weaning rates were examined using similar analyses except that genotype of service sire of dam replaced that of the offspring for the direct additive breed and direct heterosis components. The Bd values indicated that the Angus breed was inferior (P less than .01) to the Brown Swiss breed for all preweaning growth traits except for condition score, in which the Angus breed surpassed (P less than .01) the Brown Swiss. The Bm values also showed an advantage for the Brown Swiss breed for all preweaning growth traits. The additive maternal effect (the genotype of the females exposed), Bm, was important for pregnancy rate and weaning rate (P less than .001 and P less than .05) but not for survival rate (P greater than .10). The direct additive breed effect was not important for any reproductive trait. Direct heterosis did not affect any of the preweaning or reproduction traits; however, maternal heterosis (Hm) significantly affected all traits except birth weight, frame score and survival rate. The Hm estimates were 12.0 and 8.4 kg for weaning weight and 205-d weight, respectively. The Hm estimates for pregnancy rate, survival rate and weaning rate were 10, 2 and 13%, respectively.     

安西牛品种资源调查及保种对策

本文介绍了安西牛生存的自然环境、品种来源、外貌特征、生产性能和发展中存在的问题;对安西牛保护、利用提出了保种对策,对全面认识和开发利用这一优良品种奠定了基础.     

荷斯坦奶牛耐热性状的RAPD标记研究

为了筛选出耐热荷斯坦奶牛的分子遗传标记，并应用这些分子标记进行高产耐热荷斯坦奶牛的选育。从高产奶牛群中筛选出耐热性状差异显著的10头高产荷斯坦牛作为实验材料，采用RAPD作为分子标记筛选方法。优化奶牛RAPD反应最佳体系，并在154条随机引物中筛选出稳定性好、带型清晰的引物64条。通过RAPD结果，并结合红细胞钾测定结果和生产性能进行分析，确定3个分子标记与奶牛耐热性状相关，并对其进行了测序与分析。