阴道涂片法确定绵羊情期的研究

实验用阴道涂片法确定绵羊发情时期。在发情季节,把经试情确定发情周期正常的母羊于发情前期、发情期、发情后期和发情间期分别进行阴道涂片,观察各种细胞成分及其变化。结果说明,绵羊阴道涂片中主要可见到白细胞、有核上皮细胞、角化上皮细胞和细胞碎片等4种细胞成分。白细胞在发情间期数目最多,显著(P<0.01)多于其它各期;各时期有核上皮细胞的数目无显著差异;角化上皮细胞在发情期数目最多,明显(P<0.01)高于其它各期;发情间期和前期的细胞碎片明显(P<0.01)多于发情期和发情后期。因此,有可能以角化上皮细胞和白细胞的数目作为指标,确定绵羊的发情时期。     

母犬阴道出血的诊断与治疗

犬阴道出血在宠物临床上并不多见,但也时有发生,给居室里饲养爱犬的人带来很大麻烦。犬阴道出血可分为发情前期延长、发情期延长、阴道损伤、产后母体胎盘坏死和产后子宫出血。本文系统地对各种情况的犬阴道出血的病因、症状、诊断和治疗措施进行了分析和描述,并就有关问题进行了讨论。     

水稻伤流液研究进展

水稻根系伤流液可作为其研究根系活力和诊断营养状况的主要依据,同时与水稻地上部分的生长以及产量关系密切。系统综述了水稻根系伤流液的组成成分、伤流强度的变化规律、影响因素及其与地上部的关系,并对改进水稻伤流液收集方法以及其有待进一步研究的问题进行了展望。     

Results and complications of a novel technique for primary castration with an inguinal approach in horses

Reasons for performing study: Complications associated with equine castration can have medical and financial consequences. This retrospective study investigated a novel method of castration via an inguinal approach in mature stallions and compared the incidence of complications with other methods. Hypothesis: Castration via an inguinal approach has a low complication rate at the site of surgery compared with other castration techniques. Methods: Mature stallions (n = 238) were castrated under general anaesthesia in dorsal recumbency using an inguinal approach. The vaginal process was incised, the spermatic cord ligated twice and the testis removed. After suturing, the vaginal process and one or 2 layers of fascia, the subcutis and cutis were closed in a simple continuous pattern. Results: Five of 238 (2.1%) horses had post operative haemorrhage and a haematoma in the scrotal region, which required additional treatment. All horses made a full recovery. Five of 238 (2.1%) of the horses had a post operative respiratory infection, which resolved with antibiotic therapy. Sixteen of 238 (8.8%) had transient signs of colic shortly after surgery. Conclusion: This technique of castration with an inguinal approach had a low incidence of complications at the site of surgery compared with other methods. An inguinal approach and leaving the vaginal tunic in situ may cause less soft tissue trauma than a scrotal approach.     

花期前后不同干旱过程对玉米抗旱生理反应的影响

本试验对盆栽玉米分别进行了正常供水;花前水分胁迫、花后正常供水;花前正常供水、花后水分胁迫共3种水分处理,在玉米生长的拔节期、喇叭口期、花期及成熟期进行了生理特性测定,研究了花前花后水分胁迫对根系伤流量、生长参数、活力及叶片生理特性的影响。结果表明,花期是玉米开始衰老的关键时期。正常供水条件下,玉米的根系伤流液量、根系活力、CAT活性、POD活性及膜透性呈现上升趋势,在开花期达到高峰后开始下降。花前水分胁迫条件下,根系活力减弱,保护酶活性较低,MDA含量显著增加。花后水分胁迫条件下,玉米保护酶活性有大幅的减弱,花前水分胁迫对玉米生长的影响是花后补充供水难以恢复的。     

不同的氮磷和密度对红小豆伤流量及氨基酸含量的影响

采用3因素5水平2次通用旋转组合设计,在田间布置小区试验,研究了不同水平的氮、磷和种植密度处理对红小豆伤流量及成分氨基酸含量的影响,建立了相应的回归方程。结果表明:对伤流量的影响,氮、磷起主要作用,互作均不显著;理想氮、磷和密度组合方案为N 20.60~25.80 kg.hm-2,P2O520.67~32.45kg.hm-2,密度21.04万~23.96万株.hm-2。适宜的氮、磷和密度能够提高植株伤流量。氮、磷和密度对伤流量及氨基酸含量影响都呈正抛物线状,氮肥达到了显著水平;氮—密度互作达到显著水平;理想氮、磷、密度组合范围为N 24.97~30.85 kg.hm-2,P2O526.14~42.86 kg.hm-2,密度为19.63万~22.70万株.hm-2。伤流量及氨基酸含量变化与红小豆氮素的吸收效率有相似的规律。