龙眼截干换种方法试验初报

对4年生龙眼树主干嫁接、主干新梢上嫁接和二级主枝上嫁接3种换种方法的试验结果:龙眼换种采用主干上嫁接换种具有接穗用量少、换种成本低、树冠恢复快、易于管理和利于矮化栽培的优点。     

Intimal Hyperplasia in Autogenous Vein Grafting

Vascular bypass grafting with autogenous vein is a frequent and important surgical procedure to cure vascular diseases and better promote blood supply in the clinical medicine. But the intimal hyperplasia(IH) has been one of the major cause of the graft late failure, especially for the middle and small artery. The pathology of IH is brief introduced. The Etiology of IH is discussed from the balance between proliferation and apoptosis, growth factor, hemodynamics and autologous vein itself. Prevention and cure of IH also are proposed.     

穗条农艺性状对油茶岑软3号芽苗砧嫁接的影响

为了更好地进行油茶(Camellia oleifera)岑软3号芽苗砧嫁接育苗,研究了其穗条的农艺性状,即不同木质化程度和部位对嫁接育苗成活率及生长情况的影响。试验结果表明,未木质化的接穗嫁接成活率低,仅为53.17%,半木质化以上的当年生接穗,无论是顶芽、中部芽还是下部芽,嫁接成活率均可达90%以上;其中选择完全木质化接穗的顶芽生长表现最佳,其次是完全木质化接穗的中部芽和半木质化的顶芽,完全木质化接穗的下部芽和未木质化接穗的嫩芽最差。     

Intracardiac foreign body in a dog

A dog that was referred to the University of Florida Veterinary Medical Center was discovered to have a bamboo skewer within the right atrium and right ventricle, traversing the tricuspid valve. The skewer was ingested approximately four months prior to referral and was partially removed via gastrotomy. The presenting complaint at the time of referral included coagulopathy, anemia and leukocytosis. A linear, hyperechoic structure was identified in the right heart during an echocardiogram. The foreign body was suspected to be a portion of the skewer that the patient had previously ingested. Cardiopulmonary bypass was performed and the foreign body was removed successfully. Complications following surgery included the development of tricuspid valve and ventricular wall thrombi, atrial flutter and amiodarone toxicity. Many indications have been described in the veterinary literature for cardiopulmonary bypass. However, to the best of the authors' knowledge, successful removal of an intracardiac foreign body with cardiopulmonary bypass has not been reported in a veterinary patient. This represents a new indication for cardiopulmonary bypass in veterinary medicine.     

嫁接苦瓜高产栽培与管理

嫁接苦瓜栽培是用于大田生产的新型栽培方式。主要对苦瓜高产栽培技术进行以下总结。     

番茄砧木新品种抗青一号的选育

抗青一号为番茄砧木一代杂交种。该品种早中熟、耐寒性强、高抗青枯病。其与接穗易亲和、成活率高,嫁接后的番茄高抗青枯病等土传病害,抗逆性提高、不易衰老、产量增加、农药用量减少,且果实品质、商品性无不良影响。湖南省各示范点嫁接后均表现比对照红石串自根苗增产,增产幅度为50%～131.13%,平均产量3 800～4 500 kg/667m2,最高产量达5 000 kg/667m2,嫁接后增产效果十分显著,且嫁接对接穗品质影响不大。适宜在青枯病严重的番茄产区作嫁接番茄砧木品种,进行早春保护地或露地丰产栽培使用。     

Teat tip reconstruction by supernumerary teat autotransplantation in cattle

OBJECTIVE: Evaluation of use of a supernumerary teat as a pedicle graft to repair experimental teat tip damage in cattle. STUDY DESIGN: Experimental study. ANIMALS: Mature, non-gravid hybrid cows with > or =1 supernumerary teat. METHODS: The main teat and adjacent supernumerary teat were examined for patency by ultrasound with a 8 MHz linear array transducer. The tip of the main teat was resected at the junction of cistern and canal. The supernumerary teat was partially resected semi-circumferentially at the cranial aspect of the base to maintain vascular supply and transplanted by end-to-end anastomosis. The pedicle of the supernumerary teat graft was amputated in stages starting at 14 days, again at 16 days and separated at 18 days. Reconstructed teat patency was evaluated at intervals by ultrasonography and confirmed at 50 days by histopathology. Repeated measures ANOVA was used to compare the measurements of luminal diameter between days; significance was set at P<.05. RESULTS: All reconstructed teats were patent. Decreased luminal diameters were detected at 25, 32, 39, and 46 days by ultrasonography. On histopathology, granulation and epithelial (mucosal) proliferation contributed to luminal reduction. CONCLUSIONS: In this experimental model of an acute damage to a teat tip, supernumerary teat grafting was successfully used to restore teat anatomy. CLINICAL RELEVANCE: Supernumerary teat pedicle grafting may be considered as a salvage technique for reconstruction of a damaged bovine teat in cows that have an adjacent patent supernumerary teat. Function of the reconstructed teat in a lactating cow remains unknown.     

核桃方块芽接愈合体形态特征调查

砧木和接穗质量是植物嫁接繁殖工作的基础,对砧木和接穗数量化指标研究工作很少。以云新核桃方块芽接愈合体为研究对象,采用大样本的调查方法,调查了砧木粗度、帮扎方式、导流孔宽度、芽片的大小和芽的形状。分析结果表明,核桃生长期方块芽接时砧木和接穗的量化指标为:①接穗芽座无,叶痕无或有隆起但不明显;②方块芽芽片宽度在16~25 mm,长度在40~50 mm之间;③绑扎方式为露芽和叶柄;④导流孔宽度2~5 mm之间;⑤砧木嫁接部位的粗度以1.3~2.0 cm最为适宜。     

补充不同处理蛋氨酸和小肽及对奶牛产奶性能和营养物质消化率的影响

为研究蛋氨酸和小肽及其过瘤胃保护处理对奶牛生产性能和营养物质消化率的影响,本试验选择产奶量、膘情、胎次、泌乳阶段接近的泌乳奶牛12头,随机分为4组,试验1、2组添加小肽17．5 g／d·头,试验3、4组添加蛋氨酸10．0 g／d·头,其中,试验2组和4组均添加经脂肪包被的小肽或蛋氨酸。通过饲养试验和消化代谢试验分析和测定了各试验牛的生产性能及各营养物质的消化率。结果表明各组间奶牛产奶量、乳蛋白、乳脂率和饲料粗蛋白消化率无显著差异(P>0．05),但试验2组的产奶量、乳成分及粗蛋白消化率相对较高;试验1、2、4组的奶料比显著高于试验3组(P<0．05),试验4组的Ca、P消化率显著高于其它各组(P<0．05)。综合分析表明添加小肽的效果优于添加氨基酸的效果,过瘤胃保护处理有利于奶牛生产性能和营养物质消化率的提高,其中以试验2组(保护性小肽)的效果最好。     

椪柑高接换种的接枝方法研究

通过对中间砧的不同角度、不同接芽方位、不同粗度接枝进行高接试验。结果表明:8年生枳砧普通从江椪柑高接改换从江椪柑良种少核株系,切接高度可选择在1～1.5m,切接角度0°～70°,接枝切面近靠主干一侧,并以距主干角度0°～70°且直径大于1.5cm以上的粗壮接枝开砧为优。