Unilateral Nephrectomy in a Juvenile Llama

Objective —The purpose of this study was to decribe the clinical presentation, diagnostic evaluation, and surgical management of a llama with an ectopic ureter.
Animals or Sample Population —Nine-month-old female llama.
Results —The diagnostic evaluation included the use of computed tomography and an excretory ureterogram to confirm and identify the location of the ectopic ureter. Surgical management involved a unilateral nephrectomy.
Conclusions and Clinical Relevance —Computed tomography is a valuable asset to diagnose the presence and terminal location of an ectopic ureter in llamas, and nephrectomy appears to be a viable procedure to resolve the subsequent urinary incontinence.     

酿酒山葡萄引种的试验研究

2001~2005年,引种8个山葡萄种内和种间杂交品种的试验结果表明:筛选出适宜当地气候和土壤条件、抗寒、产量高、可酿造干红葡萄酒左优红、加工果汁饮料的哈桑、用于调色和调酸的双优和双红,为当地主栽和推广品种。     

甘南高原独一味间作栽培藏木香对独一味生长的影响

采用田间随机区组法研究甘南高原独一味间作栽培藏木香对独一味出苗率、成活率、叶长、叶宽和株高的影响。结果表明,独一味间作栽培藏木香时,当年生独一味的出苗率、成活率比单作极显著提高;两年生独一味的叶长、叶宽和株高的生长变化也比单作显著加快。该研究攻克了独一味大田栽培中成活率低的技术难关,对独一味的人工栽培有一定的指导意义。     

不同基因型烤烟叶片光合作用对光和CO2的响应研究

为揭示不同基因型烤烟的光合特性,通过大田试验,利用LI-6400XT光合测定系统测定了毕节烟区4种主栽品种上部叶片的光、CO2的响应曲线,分别利用Farquhar模型和直角双曲线模型拟合光、CO2曲线,阐述了4个品种光响应和CO2响应特征及其主要参数.结果表明,4个品种响应曲线规律基本一致,响应特征参数差异明显.云烟97对高光照的适应能力相对最强、碳同化能力也表现较好;K326则表现出对弱光和低摩尔分数CO2的利用效率,对环境适应能力较强;毕纳1号饱和CO2速率明显高于其余品种,具有一定的高产潜力;红花大金元的优势体现在自身碳同化过程中的羧化效率.高海拔区域,选择种植云烟97能发挥其适应高光照的优势;中低海拔区域,K326和毕纳1号适应性较好,且能更好地发挥其生产潜力.     

猪繁殖和呼吸综合征的研究进展

从近二年来已经发表或即将发表的文献来看,猪繁殖和呼吸综合征的研究已经取得了一些极为显著的进展。     

Endometrial nitric oxide synthase activity in mares susceptible or resistant to persistent breeding‐induced endometritis and the effect of a specific iNOS inhibitor in vitro

Emerging research suggests that the nitric oxide system may play a role in persistent breeding‐induced endometritis (PBIE) in the mare. Differences in uterine nitric oxide (NO) levels between mares susceptible or resistant to PBIE and a dose‐dependent inhibitory effect of NO on uterine contractility have been demonstrated. The objectives of this study were to investigate the difference in total nitric oxide synthase (NOS) activity of the endometrium between susceptible and resistant mares and the effect of a specific inducible nitric oxide synthase (iNOS) inhibitor on the endometrial NOS activity in vitro. Six susceptible and six resistant mares were selected based on preset criteria and the results of an intrauterine challenge with killed spermatozoa during oestrus. Endometrial biopsy samples were collected 24 hr post‐challenge and cultured at 37°C for 24 hr in L‐arginine supplemented minimum essential medium with or without a specific iNOS inhibitor (1,400 W dihydrochloride, 1 mM). The medium and the cultured endometrial tissue were collected after 24 hr of culture and assayed for NO and total protein, respectively. Total NO content of the medium, normalized to endometrial tissue wet weight or total protein, was used as a measure of endometrial NOS activity. Non‐parametric tests were applied for statistical analysis. Susceptible mares had significantly greater endometrial NOS activity than resistant mares. The iNOS inhibitor treatment significantly reduced NOS activity in endometrial samples derived from susceptible and resistant mares. These findings provide a basis for in vivo testing of specific iNOS inhibitors as preventative or therapeutic options for PBIE in mares.     

黄土藻类回接之生境条件研究

通过液体藻种固相接种培养试验,对人工培养藻类结皮的生态环境条件进行了研究,探讨了温度、光照、水分对藻类生长繁殖的影响规律。结果表明:温度条件对藻类的生长有影响,20℃和室温条件下藻类生物量平均增长率较小,说明其生长比35℃条件下稳定;从光照条件来看,全光和暗光条件下藻类生物量逐渐减少,而弱光条件下生物量持续增加,说明弱光条件下藻类生长最旺盛;水分是影响藻类生长的重要条件,土壤含水量达到30%～35%时藻类生长良好,说明足够的水分供给能够增强液体藻种对环境的适应性,因此,在藻类接种的初期,加强水分的供应能够保证人工培养藻类结皮的成活率。     

黄土高原丘陵沟壑区放牧林草地土壤团聚体性质研究

通过放牧试验的方法,研究土壤团聚体含量和破坏率,以探讨不同放牧强度、不同放牧畜种、不同放牧植被类型条件下表土的团聚体(＞ 0.25 mm)含量和破坏率.结果表明:放牧强度对土壤性质有影响,重度放牧下土壤团聚体含量最小;从畜牧羊种选择来看,绵羊相对于山羊来说对土壤结构破坏较小,土壤中团聚体含量较高;对于不同植被类型,放牧...     

沿海防护林主要病虫害发生原因及防治对策

本文对日照沿海防护林17种主要病虫害发生原因进行了全面分析，提出了相应的防治对策。