油橄榄引种试验初报

在大具乡建立油橄榄基地,从2006年开始先后从国内外引进油橄榄种植资源30余份进行栽培试验。结果表明,引进的30个品种中除了克罗莱卡、软阿斯、城固32、米提尼的生长挂果情况差之外,其余的品种表现都良好,尤其是豆果、皮瓜尔和佛奥的生长挂果情况较为突出。抗病虫害较好的品种为莱星、鄂植8号,因此,在丽江市进行油橄榄推广中可以重点选择以上几个品种。     

湖桑硬枝扦插育苗试验初报

湖桑硬枝扦插育苗技术成功后,由于留叶取穗不合算,因此推广甚少。近年,苏州蚕专研究用温床促根的办法,使剪稍桑条扦插成功,这是硬枝扦插技术的重大突破,为探索该技术的实用价值,今年我们搞了小面积试验,虽因地热线损坏而提前终止加温,但已显示其实用价值。现将情况介绍如下:     

桑树地膜覆盖硬枝扦插育苗试验初报

<正>桑树硬枝扦插育苗法,曾有多人搞过,也都取得了较好的效果.但从方法上来看,还存在着技术要求高,实用操作麻烦等问题,难以被农民接受,生产上大面积推广受到了限制.受前人硬枝扦插育苗试验的启发,1995、1996年,我们采取地膜覆盖、桑树硬枝直插法进行了育苗试验,取得了显著效果.现将试验情况报告如下:     

插床类型对油橄榄扦插育苗根构型及上袋生长的影响

为了探索出一种集生根率高和节约化为一体的油橄榄扦插育苗技术,试验设计了6种插床,对比了不同插床对不定根构型及后期苗木生长的影响。结果表明：缩小插床空间有利于提高床内温湿度,生根率可达98％以上;采用育苗袋进行扦插,受物理修根作用的影响,可控制不定根的生长方式,螺旋式根系质地柔韧,上袋不易折断,明显提高了上袋成活率;床内架空,在空气修根作用下不定根生长到一定程度后受空气温湿度的影响而褐化,从而影响根尖生长,促使二级不定根生长,提高了根系质量和数量;该扦插方法单位面积出苗率是普通插床的2倍以上,基质可重复利用,节约了育苗成本;后期苗木抽梢早,枝梢长势强。本试验中,可将T4和T6插床设计在现实生产中推广应用。     

桑树硬枝扦插试验初报

选用鲁插1号、鲁插2号、鲁插3号、昌盛、湖桑32号、71-1,进行硬枝扦插试验对比,2011年3月份开始在我镇进行。鲁插系列的桑树硬枝扦插的成活率明显高于其它品种。这一方法取得成功,能大大减少桑树育苗的用工,缩短桑树育苗的时间。     

茶树良种扦插省力化育苗新技术

茶树良种扦插省力化育苗新技术雷光明，聂樟清，叶美凤（江西省蚕桑茶叶研究所３３０２０２）茶树良种短穗扦插育苗，江西历来以夏末秋初为最适宜，但遮荫。浇水费工很多，如遇伏旱，更加大了苗圃管理的工作量，影响茶苗生长和成活率，造成茶树良种繁殖成本高。推广慢、普...     

实生桑不同部位及不同基质扦插育苗试验初报

将2年生实生桑苗做根茎部剪截,人为分成全木质化、未木质化、半木质化三种,进行扦插对比试验。结果表明,木质化程度较深的剪截苗生根发芽率高。     

云南丽江油橄榄介壳虫调查及防治试验

介壳虫危害影响丽江地区油橄榄引种产业的发展。2015年进行了丽江地区油橄榄介壳虫的调查及防治试验。结果表明,存在两种危害油橄榄的介壳虫,分别是油橄榄片盾蚧和矢尖盾蚧;不同品系油橄榄危害介壳虫种类与成虫和若虫种群数量有显著的差别。应用两种市场化学药剂不同剂量对两种介壳虫防治试验均显示有较强的杀虫效果,其中对若虫防治效果强于成虫,两次连续用药显著提高防治效果。     

正交试验方法在铺地百里香扦插繁殖中的应用研究

应用正交试验方法,对园林芳香草坪新种--铺地百里香Thymus serpyllum进行了扦插繁殖试验研究.结果表明,扦插基质是影响铺地百里香扦插繁殖的主要因素,其次为插穗、NAA浓度、插穗在NAA中的浸泡时间;四因素的最佳水平组合为A2B2C2D2,即剪取上部枝条4～5 cm,去顶芽后,用珍珠岩做扦插基质,在浓度为100 mg/L的NAA中浸泡5 min,铺地百里香的扦插效果最为理想.     

蛋鸡强制换羽试验效果初报

强制换羽技术已在现代养禽业中被广泛运用。2012年9月至2013年1月某鸡场对一批罗曼蛋鸡进行了强制换羽试验,通过实施强制换羽,复产后产蛋高峰来得整齐,获得理想的第二个产蛋周期,前后三个月平均值相比种蛋合格率提高31.3%、蛋重提高16.3%、受精率提高12.3%、孵化率提高18%、出壳重提高11.7%,节约培育费用,延长种鸡经济利用期,一定程度上回避了经营风险。     

蚯蚓人工养殖试验初报

蚯蚓,又名地龙,是世界上最有价值的生物之一。由于它在医药、食品、环保、禽畜饲料、水产养殖和土壤改良等方面具有很高的价值,因而蚯蚓的开发利用受到各国专家的瞩目。蚯蚓含65％左右的蛋白质,多种人体必须氨基酸、维生素、矿物质等,美国、日本已将蚯蚓作为食品精制成各种糕点、罐头等;我国也成     

三华李化学脱叶药剂筛选试验研究初报

迫使三华李提早落叶,可以实现三华李二次开花,从而进行反季节促早栽培。以4～5年生三华李果树为对象,通过喷施脱落酸、乙烯利、噻苯隆、石硫合剂等药剂进行生长季脱叶试验。结果表明：全株喷施45%石硫合剂10～15倍液总体效果最好,药后30天脱叶率可达80%以上,老叶脱叶彻底,只剩树体顶端嫩叶,且脱叶速度较缓,有利于树体营养的积累,同时还可起到清园的作用;乙烯利脱叶速度快,效果好,喷药后15天脱叶率达到100%,但易产生药害,对三华李树体影响较大,不推荐后续使用。     

Influence of storage time and processing on chemical composition and in vitro ruminal fermentation of olive cake

Olive oil extraction generates olive cake (OC) that could be used in ruminant feeding. However, the chemical composition of OC is affected by multiple factors, being therefore highly variable. The objective of this study was to analyse the influence of storage time and further processing: crude, exhausted (subjected to a second oil extraction) and cyclone (obtained from a cyclone separator) on nutritive value of OC samples. Twelve samples (six crude and six exhausted) were obtained monthly from the same pond from 1 to 6 storage months, and nine samples (three crude, three exhausted and three cyclone) were obtained monthly from a different pond from 6 to 9 months storage. Chemical composition was analysed, and OC samples were fermented in vitro with sheep rumen fluid. Increasing storage time up to 6 months decreased sugars and total soluble polyphenols content but increased fibre content in OC. Dry matter effective degradability (DMED) decreased linearly (p < 0.001) by 35.9 and 45.5% as storage time augmented from 1 to 6 months for crude and exhausted OC, respectively. Crude OC had lower DMED values than exhausted OC (averaged values 0.255 and 0.294 g/g, respectively). Both potential production and rate of gas production were lower (p ≤ 0.018) in crude compared with exhausted OC, which was attributed to the high fat content of crude OC (≥86 g/kg dry matter). For samples stored longer than 6 months, cyclone had greater (p < 0.05) DMED than crude and exhausted OC (averaged values 0.207, 0.164 and 0.164 g/g, respectively). The results indicate that ruminal degradability of OC is reduced with advancing storage time, but only subtle changes were observed during the first two months. Cyclone showed greater degradability than crude and exhausted OC, but differences between crude and exhausted OC became negligible after five storage months.     

Effects of the supplementation with an high‐polyphenols extra‐virgin olive oil on kinetic sperm features and seminal plasma oxidative status in healthy dogs

The aim of this work was to evaluate the effects of the supplementation of two extra‐virgin olive oils (EVOO) having different polyphenols content, on canine spermatozoa kinetic parameters and seminal plasma oxidative status. The study was conducted on 12 clinically healthy dogs of different breeds (2–7 years, 5–48 kg of body weight) divided into two groups: an experimental group supplemented with EVOO (Coratina cultivar) high in polyphenols (H‐P) and a control group fed EVOO (Cima di Bitonto cultivar) low in polyphenols (L‐P). The oil was daily administered per os (1 ml/3 kg BW) before meal. Semen collection was made twice at 15 days distance (D0₁ and D0₂) and then at 30 (D30), 60 (D60) and 90 (D90) days. Semen concentration and kinetic parameters were measured using computer‐assisted sperm analysis (CASA) system to evaluate: sperm total count, sperm motile (MOT%), progressive motility (PROGR%) and its fractions, straight‐line velocity (VSL, μm/s), curvilinear velocity (VCL, μm/s), average path velocity (VAP, μm/s), amplitude of lateral head displacement (ALH, μm), beat cross frequency (BCF, Hz), straightness (STR%) and linearity (LIN%). On seminal plasma, reactive oxygen species (ROS) and biological antioxidant potential (BAP) were tested. From findings, no differences were found for sperm MOT, VSL, VCL, VAP, ALH, BCF, STR, LIN and BAP. A gradual enhancement of PROGR% was observed in H‐P group (p < .01). The ROS levels were higher in dogs H‐P compared to the other group (p < .05). In conclusion, our results highlight the positive effects of EVOO polyphenols on sperm PROGR% in healthy dogs.     

摩擦式自锁装夹切削锥形孔件的方法

摩擦式自锁装夹切削,是一种针对壁厚较薄,而孔径较大的锥形孔件能获得外观光洁,无接刀痕迹,内外径同轴度高,工件无变形无夹伤,生产效率高的制造方法。     

罗汉果组培苗扦插繁殖技术研究

采用正交试验设计研究了扦插温度、扦插基质、激素类别、激素浓度对罗汉果组培苗扦插效果的影响。结果表明：成活因子和长势因子分别为第1、2主成分,2个因子的方差累计贡献率在77%以上;扦插温度、激素类别对扦插苗的影响较大,扦插基质、激素浓度影响次之;扦插效果最佳组合为：扦插温度25 ℃,扦插基质为细河砂,激素浓度为200 mg/L的吲哚丁酸。