莱豆新品种龙莱1号的选育

征集龙岩市莱豆地方品种13个,按照育种目标进行品种筛选、提纯、繁殖、特征特性观察与栽培技术试验,育成的莱豆新品种龙莱1号具有中熟、品质优、产量高、抗病性较强、适应性广、商品价值高等特点。该文介绍该品种从2003～2010年的选育过程及该品种主要特征特性。     

血吸虫疫苗研究现状和发展方向

血吸虫疫苗的研究工作已经进行了很长一段时间,发现了一批有价值的候选疫苗分子。同时通过改进和优化免疫途径,血吸虫疫苗的免疫保护力正在逐步提高。随着研究的日益深入,对血吸虫疫苗的免疫机制等了解更加透彻,距离研制出能诱导高的、稳定的免疫保护力的疫苗分子的目标将越来越近。     

北京建设都市型现代农业的研究探索

近年来,在北京市委、市政府的正确领导下,深入贯彻落实科学发展观,将农业作为首都经济、社会、生态系统的重要组成部分和社会主义新农村建设的首要任务,积极开发农业多功能,挖掘农业新价值,对建设都市型现代农业进行了深入地研究和探索,取得初步成效。     

早胜牛的采精及细管冻精制作技术要点

近年来，伴随我国畜牧业蓬勃发展的同时，为了更大限度的提高母畜的受胎率和充分利用优秀种畜的基因，人工授精技术得到了不断完善和发展，并在全国各地广泛推广和应用。本文结合实践经验总结出的一些技术措施，阐述了对早胜牛这一地方优良种质资源进行保种和开发利用的重要意义，同时指出人工授精技术和低温冷冻保存精液技术在早胜牛上的实践，对于进一步开发利用培育优质高产肉牛新品种，促进肉牛产业高质量发展具有非常重要的现实意义。通过早胜牛种公牛采精的全过程以及细管冻精制作要点的详细讲解，低温冷冻保存精液技术，可更经济、可靠地实现家畜品种资源的保护，让优良基因长时间保存使得后续研究需要得到保障。     

两种血清抗性检测方法的比较分析

采用流式细胞术法对大肠杆菌的血清抗性进行检测,并与传统涂板法相比较,探讨流式细胞术在血清抗性检测方法中的应用。结果表明,两者呈正相关关系(P=0.0340.05),流式细胞术法可以代替涂板法对大肠杆菌的血清抗性进行检测。该方法可以减少由于涂板不均匀、人工计数等造成的误差,且易操作、计算少、耗时少,数据更准确。     

基于“车间实境课堂”的机械类专业实践课程教学研究

结合机械类专业实践课程特点,针对传统教学过程中在教材、教师、课程设置方面存在的问题,探索结合生产实际的"车间实境课堂"教学法,主张将车间实际场景融入到课程教学全过程,实现理论知识与工程实际的紧密结合,以提高学生的学习兴趣及工程实践与创新能力,进而有效提升应用型工程技术人才的培养质量。     

Effects of Lactic Acid Bacteria and Fructooligosaccharides on Growth Performance,Nutrient Digestibility and Serum Biochemical Indices of Arctic Foxes (Alopex lagopus) during Early Growth Period北大核心CSCD

This experiment was conducted to study the effects of dietary lactic acid bacteria (LAB) and fructooligosaccharides (FOS) on growth performance, nutrient digestibility and serum biochemical indices of Arctic foxes (Alopex lagopus) during early growth period. Sixty male post-litter Arctic foxes with the average body weight of (1.16±0.15) kg and at the age of (45±3) days were randomly assigned to 4 groups with 3 replicates per group and 5 foxes per replicate. The foxes were fed the following diets, respectively: basal diet (control group), basal diet+3×109 CFU / kg LAB (LAB group), basal diet+5 g / kg FOS (FOS group) and basal diet+3×109 CFU / kg LAB+5 g / kg FOS (LAB+FOS group). The experiment lasted for 30 days. The results showed as follows: 1) on the days 1 to 15, the diarrhea rate of foxes in the LAB group and LAB+FOS group was significantly lower than that in the control group and FOS group (P<0.05). On the days 16 to 30, the average daily gain of foxes in the LAB+FOS group was significantly higher than that in the control group and FOS group (P<0.05), but had no significant difference with LAB group (P>0.05); the diarrhea rate of foxes in the LAB+FOS group was significantly lower than that in the control group and FOS group (P<0.05), but had no significant difference with LAB group (P>0.05); compared with the FOS group, the feed to gain ratio of foxes in the LAB+FOS group was significantly decreased (P<0.05). 2) The dry matter digestibility of foxes in the LAB + FOS group was significantly higher than that in the control group and FOS group (P < 0.05), but had no significant difference with LAB group (P>0.05). There were no significant differences in nitrogen intake, fecal nitrogen, urine nitrogen, nitrogen deposition, net protein utilization and protein biological value among all groups (P>0.05). 3) Serum total protein (TP) content of foxes in the LAB+FOS group was significantly higher than that in the FOS group (P<0.05), but had no significant difference with control group and LAB group (P>0.05). Serum albumin (ALB) content of foxes in the LAB group was significantly higher than that in the control group and FOS group (P<0.05), but had no significant difference with LAB+ FOS group (P>0.05). Serum urea nitrogen (UN) content of foxes in the LAB+FOS group was significantly decreased compared with the control group (P < 0. 05). In conclusion, the combined supplementation of 3 × 109 CFU / kg LAB and 5 g / kg FOS in the diet is beneficial to reduce diarrhea rate, improve dry matter digestibility, improve body immune level, and promote the growth of Arctic foxes during early growth period. © 2023 Chinese Journal of Urology. All rights reserved.     

馉饳菜生物学特性的研究

麦瓶草幼苗是当地人们喜食的野菜,俗称馉饳菜.本试验对其生长发育性状和种子发芽特性进行了研究,以期为麦瓶草的栽培提供依据.结果表明,麦瓶草种子在低于15℃时播种,可以迅速发芽,在年前形成幼苗,年后为产品形成期,至3月底采收结束.麦瓶草种子寿命较短,为短命种子,只有当年采收的种子才萌发良好,陈种子发芽率极低.种子发芽整齐度高,萌发期3～5 d,光照对发芽过程没有影响,为中光性.     

儒学审美意识与中国古典园林的交融

儒家思想及其审美意识对中国古典园林的产生和发展影响深远。笔者先从早期儒学与园林肇端的交融谈起,说明儒家主导思想及审美意识与中国古典园林的交融,主要体现在礼乐人格塑造、山水比德思想、隐逸出世思想等方面,挖掘中国造园思想的哲学、美学根源,及其对现代园林景观的启示。     

新疆核桃腐烂病拮抗菌的筛选及鉴定

为给核桃促生菌群的构建提供菌株材料,通过对新疆核桃拮抗菌的分离纯化,筛选出对核桃腐烂病病原菌具有拮抗作用且能在其根际稳定定殖的优质高效菌株。从阿克苏、和田、喀什等新疆核桃主产区的根际土壤中分离出拮抗菌30株,采用对峙试验法对其拮抗能力进行测定,选出拮抗菌14株。经耐利福平诱导后剩余7株。将其进行大田定殖试验后,最终筛选出7株拮抗菌。经16S r DNA鉴定,这7株拮抗菌属于3个属,分别为假单胞菌属Pseudomonas、芽孢杆菌属Bacillus、链霉菌属Streptomyces,其中假单胞菌属为优势种属,且拮抗效果及稳定性最好。