不同砧木材料嫁接冬瓜苗期氮营养特性综合评价

评价冬瓜砧木的氮素营养效率,解决冬瓜氮肥施用过量的问题.以'铁柱168'为接穗,获得11种嫁接苗,以自根苗为对照,分别在低氮(0.5 mmol/L)和正常氮(14.0 mmol/L)水平下进行水培试验,测定11种砧木材料的嫁接冬瓜苗期的植株干物量、氮含量和氮素累积量等指标.通过主成分分析计算嫁接苗与自根苗在正常氮和低氮...     

壳聚糖与丙烯酰胺接枝聚合反应的研究

以硝酸铈铵作为引发剂,将壳聚糖与丙烯酰胺接枝聚合得到改性的壳聚糖-丙烯酰胺聚合物。结果表明,其最佳反应条件为温度30℃,时间4h,硝酸铈铵引发剂浓度0.4mmol/L,壳聚糖与丙烯酰胺单位比例为1∶7。     

章古台沙地樟子松嫁接红松技术的研究

利用樟子松作砧木,以红松作接穗,改变了红松对立地条件要求较高的生物学特性,扩大了红松的栽培范围。试验表明:在章古台沙地经嫁接的红松生长发育良好,并正常开花结实,径生长量为樟子松的117.8%,材积为146.38%,其木材产值是樟子松的4.4倍。     

甜瓜中间砧对嫁接黄瓜生长和果实品质的影响

 【目的】探讨甜瓜中间砧对日光温室黄瓜生长和果实品质的影响。【方法】以‘中农14’黄瓜为接穗,‘伊丽莎白’甜瓜为中间砧,根砧为‘砧优美’白籽南瓜,研究甜瓜中间砧嫁接、普通嫁接和自根黄瓜的植株生长势、伤流液成分及黄瓜果实品质差异。【结果】甜瓜中间砧嫁接黄瓜生长势比自根黄瓜生长势强,与黄瓜/南瓜嫁接相比差异不明显;果实中的可溶性糖、可溶性固形物、VC含量显著高于黄瓜/南瓜嫁接,而可滴定酸含量显著低于黄瓜/南瓜嫁接;保留2片甜瓜真叶的中间砧对黄瓜品质的影响效果更佳,并可显著提高可溶性蛋白和干物质含量。【结论】甜瓜中间砧嫁接既可保持普通嫁接的强生长势,又可显著改善黄瓜果实品质。     

茄果类蔬菜嫁接栽培研究进展

综述了茄果类蔬菜嫁接栽培的研究进展、研究方法和应用效果。通过对砧木的选择与选育,可以不同程度地降低茄果类蔬菜土壤传播病害的发病率,砧木对接穗的生理影响表现为可提高作物的根系活力,增强养分吸收能力,提高内源激素水平,加快光事速率,显提高茄果类蔬菜的产量。嫁接方法对嫁接成经和嫁接苗的生产性能无影响,嫁接部位对嫁接苗的生长发育、产量和早熟性有显影响。     

犬低温体外循环综合监测的试验研究

试验借助现代医学监测设备,首次在我国兽医临床对２８只低温体外循环的犬系统开展了生命体征综合监测的研究。结果表明,密切观察动态心电（ＥＣＧ）,结合平均动脉压（ＭＡＰ）、中心静脉压（ＣＶＰ）、心率（ＨＲ）的变化,是判断循环功能、冠状动脉灌注、心肌缺血改变、保证脑血流通畅以及辅助转流时间长短的主要参考指标。保持良好的血气监测水平,是达到满意组织灌注不可缺少的指标;进一步证实,体外循环期维持良好的血钾水平,并于主动脉开放后１０ｍｉｎ适时补钙,有利于心脏收缩与复苏,对减轻心肌再灌注损伤具有重要作用。研究提示为确保每只手术犬在低温体外循环的肝素标准化以及合理使用鱼精蛋白用量,激活全血凝固时间（ＡＣＴ）的监测必须个体化。     

一种新型的ATM交换机的缓冲结构

比较了目前流行的各类交换的缓冲结构及缓冲管理技术，在此基础上提出了一种可行的缓冲结构，采用了旁路技术和共享缓冲技术，并对输出流量作了整形。     

杨木塑合木制备初探Ⅲ．杨木塑合木的红外光谱分析

对选定工艺条件下的各种杨木塑合木进行了傅立叶变换红外光谱（FTIR）分析，确定改性试剂在木材组织内与细胞壁高聚物发生了接枝反应。     

榆叶梅乔化繁育技术研究

通过在乔木树种上嫁接繁殖，可使榆叶梅形成良好干形，在园林绿化工程中有更好的应用价值。试验证明，李树与榆叶梅嫁接亲合力好，可以作为乔化榆叶梅的嫁接砧木，嫁接后可以形成较好的干形，达到乔化榆叶梅的目的。     

Suboccipital craniectomy, dorsal laminectomy of C1, durotomy and dural graft placement as a treatment for syringohydromyelia with cerebellar tonsil herniation in Cavalier King Charles spaniels

OBJECTIVE: To evaluate retrospectively the efficacy of the suboccipital craniectomy and dorsal laminectomy of C1 with durotomy and placement of a dural graft for treatment of syringohydromyelia (SHM) because of cerebellar tonsil herniation in Cavalier King Charles spaniels (CKCS). This technique is used with great success in human medicine. STUDY DESIGN: Four CKCS diagnosed by Magnetic resonance imaging (MRI) of SHM because of cerebellar tonsil herniation and not responsive to medical therapy underwent a suboccipital craniectomy and dorsal laminectomy of C1 (2 dogs) and of C1 and partial C2 (2 dogs) with durotomy and placement of a dural graft. Three dogs were evaluated neurologically 24 hours, 1 month, and 3 months postoperatively and evaluations were compared with preoperative neurological examination. Repeat MRI took place 3 months postoperatively. RESULTS: Neurological examinations showed neither improvement nor progression of clinical signs 3 months postoperatively. MRI showed no regression of syrinx size 3 months postoperatively. CONCLUSION: Improvement was not seen. Given the progressive nature of the disorder, evaluation over a longer period of time is necessary to detect if progression has stopped. Some modification to the surgical technique is needed to accomplish the same results as in human medicine. A study of a larger population is needed to attain more reliable information. CLINICAL RELEVANCE: Suboccipital craniectomy and dorsal laminectomy of C1 with durotomy and placement of a dural graft is a feasible technique in CKCS, but needs some modification to accomplish the same results as in human medicine.