不同嫁接方法对紫娟茶树嫁接成活率的影响

以碧香早为砧木,采取10年生紫娟茶树枝条为接穗,通过采用劈接、切接和腹接3种嫁接方法及5种不同接穗形式研究紫鹃在湖南地区的嫁接成活率及生长状况。试验结果表明:3种嫁接方法对成活率影响存在显著差异,其中腹接成活率最高;不同的接穗形式对嫁接成活率和接穗新梢的生长情况存在显著影响,其中采用一芽一叶(叶子为全叶)和一芽两叶(第二片叶剪去一半)的接穗形式,嫁接成活率最高,达90%以上,且接穗新梢生长最好。采用芽接的接穗形式,嫁接成活率最低,成活率为20%。     

浅谈战略转型条件下海南橡胶资产的保护

对番木瓜传统的单芽腹接法种苗繁殖进行芽接技术的创新研究，并采用3种嫁接方法进行比较试验。结果表明：不同品种的番木瓜采用创新研究技术的单芽腹接创新法的发芽率为67.50%，比传统单芽切接法高23.6%；单芽腹接创新法比切接法的发芽率高14.8%；芽接技术的创新研究取得了突破性进展，其研究结果对番木瓜产业化的发展具有重要的促进作用。     

枇杷“高接换种”后的管理技术

良种是果树生产的生命线．对定植多年的枇杷实生树或劣种树进行“高接换种”是改良种性、提高产量、品质的行之有效的捷径．不同的树龄、树势，嫁接方法各异．通常采用剪（锯）须切接、倒砧切接、嵌接，少数采用腹接．“高接换种”的效果如何，除了与嫁接技术有关，还与接后的管理水平高低有密切的关系．如精心管理，第二年即可形成新的树冠，开花结果；管理不当，会直接影响成活，有的即使愈合抽新芽也会死亡；有的则迟迟形不成良好的树冠．因此，接后管理是嫁接换种成败的重要一环．现把莆田市近年枇杷接后的管理技术措施总结如下，供参考…     

印楝嫁接技术研究

研究3种嫁接方式(劈接、切接和芽接)以及3种不同砧木大小(小于0.5 cm、0.5～1 cm、1～1.5 cm)和3个不同无性系(LD0505、LD0507和LD0509)对印楝嫁接成活率的影响。结果表明：嫁接方法是影响嫁接成活率的关键因子，其次是砧木的大小，不同无性系对嫁接成活率影响不显著，采用切接和砧木大小为1～1.5 cm时能够提高印楝嫁接成活率，最佳的处理组合是A2B3C2，成活率高达85%。     

香荚兰嫁接试验结果与分析

在不同生长季节，采用合接，劈接，切接、靠接等嫁接方法，对墨西哥香荚兰和滇南香荚兰进行嫁接，并用椰子汁，蔗糖溶液和２，４－Ｄ，ＩＢＡ，ＢＡ等处理砧穗，还进行了共砧嫁接与反接试验，结果，各种试验方法均未获嫁接成活植株。初步分析认为，香荚兰植物嫁接时愈伤组织木栓化，是导致双方嫁接合部不亲和，嫁接不成功的主要原因。     

龙眼和芒果小苗切接技术

一、龙眼小苗低位切接技术对于龙眼嫁接方法的研究，近几年有很大的发展．从舌接法到目前普遍使用的切接法，更显得方法简单易行，提高工效和节省接穗等优点。低接位的优点一是生产上有利矮密早栽培，二是解决个别龙眼苗种植后接口处产生上大下小，植株生长不良的问题，即树头培土重新引发接位处生根。然而，由于龙眼嫁接技术性较强，往往因某个环节操作不当或气候条件不适而影响成活率．尤其是低位嫁接，因组织相对老化，而成活率不高。为了探索龙眼小苗低位切接的技术，经过多年的嫁接实验，其成活率达85％以上。现将这项技术介绍如下。一…     

热区桃树育苗技术研究

对解除桃种子休眠的3种方法及2种嫁接方法在不同生长季节的嫁接成活率进行比较研究。结果表明，用冷藏和除去种皮的方法可解除桃种子的休眠，切接和嵌芽接对桃树嫁接的成活率都较高，但用嵌芽接法嫁接较好。     

漳州地区碧桃嫁接试验

为加快碧桃品种的扩繁速度,增加种苗数量,通过以本地毛桃作为砧木,分别在春季的3月和秋季的10月使用切接和芽接两种嫁接方法,进行碧桃嫁接试验,结果表明:10月芽接碧桃嫁接成活率最高,是漳州地区碧桃嫁接最佳方法。     

云南双江县茶树良种嫁接比较试验

为提高云南双江县茶区茶树良种嫁接成活率,就不同嫁接时间、嫁接方法、接口高度等对茶树良种嫁接成活率影响因素进行比较研究.茶树良种嫁接试验结果表明,双江县茶区茶树嫁接时间以冬季(1月)为宜,接穗为一芽一叶,嫁接方法以"劈接-接口高度15 cm-套袋-遮阴"较好.     

小粒咖啡鲁伊鲁—11嫁接改良及繁育试验研究

用咖啡F1优良复合杂交种鲁伊鲁－11作接穗,开展咖啡幼苗嫁接繁育和大树换冠改造试验。幼苗春季嫁接,当年可出圃种植;大树换冠改造投产早,经济效益显著。通过嫁接部位套塑料袋保暖保湿措施使适宜的嫁接期延长。采用切接法并利用环保型绑缚材料接蜡膜,既简便,包扎严实,又节省接穗材料,成活率很高,促进了小粒咖啡杂交F1品种的推广应用。     

豫北优质大豆产业发展策略

针对豫北地区的大豆生产现状，从气候、土壤、品种、生态因素及市场需求等方面提出了优质大豆的发展策略与途径。     

Comparisons of methods of scheduling irrigations of potatoes

Irrigation of Netted Gem potatoes was scheduled during three growing seasons by three methods: (a) when plants displayed first visual symptoms of moisture stress, (b) when indicated by a soil moisture budget involving estimated evapotranspiration, and (c) on the basis of tensiometer readings of soil moisture suction. When the tensiometer method of scheduling was used, the mean yields of tubers were 55.0 and 25.8 cwt/acre (6160 and 2890 kg/ha) higher than those obtained with the other two scheduling methods. Methods did not affect the specific gravity of potatoes. Method (a) scheduled irrigations least frequently. Scheduling by the budget method was not always adequate because it was based on the assumption that the crop extracted water from a constant 4 ft (1.2 m) profile from planting to full vegetative growth. In one year the budget method scheduled the first irrigation earlier than necessary and delayed the second irrigation during a critical period of crop growth. From full vegetative cover to harvest the irrigation schedules were alike for both the budget and tensiometer methods.     

吉林省平安农业科学院大豆所大豆研究工作报告

1　吉林省平安农业科学院大豆研究工作简介吉林省平安农业科学院大豆研究所 ,设在吉林省长春市西安大路种子大厦内。现有科技人员 6人 ,其中研究员 2人 ,农艺师 2人 ,技术员 2人 ,定向培养研究生 2人。大豆研究所的主要任务是选育稳产、高产、优质及抗病虫大豆新品种 ;同时密切     

湖南沅陵4种绿茶品质成分分析

以长沙县高桥相同嫩度茶鲜叶原料采用卷曲形毛尖茶加工工艺制绿茶为对照,分别对沅陵县齐眉翠峰、凤娇碣滩茶、干发茶和军大坪茶4种绿茶的主要生化成分与感官品质进行初步分析。结果表明,沅陵4种绿茶的茶多酚总量28.76%~30.34%,游离氨基酸总量2.35%~3.22%,咖啡碱含量3.00%~3.63%,水浸出物含量37.26%~40.07%,可溶性糖总量5.46%~5.65%,可溶性蛋白含量1.50%~1.74%,类黄酮化合物总量1.16%~1.79%,叶绿素总量1.36%~2.01%,儿茶素总量13.53%~16.20%。与对照相比,4种绿茶的茶多酚、可溶性糖和儿茶素总量均高于对照,除齐眉翠峰外其余3种茶样水浸出物和叶绿素总量均高于对照,除干发茶外其余3种茶样类黄酮化合物总量均高于对照。     

Analysis of nutritional components of eight famine foods of the Republic of Niger

In the western Sahel, indigenous plants become important staples when cereal harvests are inadequate to support populations inhabiting that region of Africa. The purpose of this study was to assess the nutrient content of several of these edible wild plants. The leaves of the following seven plant foods were analyzed: Ziziphus mauritiana, Cerathotheca sesamoides, Moringa oleifera, Leptadenia hastata, Hibiscus sabdarifa, Amaranthus viridi, and Adansonia digitata. The fatty acid, vitamin E, carotenoid, selected mineral and amino acid contents of these plant foods were determined. These same analyses were performed on the fruit of the Adansonia digitata. In quantitative and qualitative terms, Amaranthus viridis was found to be an excellent source of protein. Its amino acid composition compared favorably to that of a World Health Organization (WHO) protein standard. It also contained considerable amounts of the two fatty acids that are essential in humans (linoleic and -linolenic) and a number of minerals including iron, magnesium, calcium and zinc. The leaves of Hibiscus sabdarifa contained an appreciable quantity of protein the composition of which was comparable to the WHO standard. The mineral content of the leaves of this plant was also exceptionally high; noteworthy was its high zinc content. H. sabdarifa also contained significant quantities of the two essential fatty acids. Ziziphus mauritiana was an excellent source of the essential fatty acid linoleic acid and several of the metals including iron, calcium, magnesium and zinc. Its content of other essential nutrients, however, was rather low. In general, Adansonia digitata leaves were nutritionally superior to the fruit of the tree; however, the fruit did contain useful quantities of potassium, phosphorus, zinc and -linolenic acid. The Leptadenia hastata leaves were an especially good source of lutein and -carotene. These data should be useful to the people who inhabit the western Sahel in helping them devise healthy diets during times when cereal staples are in short supply.     

防治水稻潜叶蝇的药剂筛选

通过对防治水稻潜叶蝇不同药剂、不同用量的田间对比试验,结果表明,32 g/kg的35%丁硫克百威拌种预防潜叶蝇效果最好,药效可达55 d以上,适宜在生产上推广应用。     

狗牙根诱变后代抗寒性评价

通过电解质外渗法和匍匐茎恢复试验对‘阳江’狗牙根及其12个通过形态鉴定选出的坪用价值高且花序密度低的诱变后代进行抗寒性鉴定。电解质外渗法结果表明:诱变后代间的抗寒性具有较大差异,其叶片半致死温度(LT₅₀)的变异范围为-7.6～-0.2℃(最低值与最大值相差7.4℃);参试材料抗寒性由强到弱依次为M18>M4>M26>M28> M22>阳江>M29>M31>M10>M37>M16>M1>M25,其中,有5个诱变后代抗寒性优于亲本,分别是M18、M4、M26、M28、M22。匍匐茎恢复实验结果表明:诱变后代M1、M22、M26、M31、M25在0℃和-5℃低温胁迫后的恢复生长率都高于亲本,恢复能力均优于亲本;M10、M37、M28在-5℃低温胁迫下,恢复生长能力低于亲本,抗寒性相对较弱,M16和M4在0℃和-5℃低温胁迫下,恢复生长率都低于亲本,抗寒性明显弱于亲本。综合2种方法鉴定结果显示:诱变后代M1、M25的恢复能力较强;M4、M28的叶片抗寒性较好,青绿期较长;M22、M18、M26的叶片抗寒性和匍匐茎恢复能力均较强;M29,M31的叶片抗寒性和匍匐茎恢复能力与亲本相似;M10、M16、M37的叶片抗寒性和匍匐茎恢复能力均较弱,整体抗寒性较弱。     

芦笋枯萎病病原鉴定

对造成福建省漳州市东山县的芦笋枯萎病病原菌进行分子鉴定,以期确定病原菌的属、种名,为防治该病害寻求理论依据。试验对分离纯化的病原菌核糖体DNA的ITS区进行测序,在Genbank中搜索其同源性并构建它们的系统发育树,结果表明：引起芦笋枯萎病的病原菌是镰刀属中的尖孢镰刀菌(Fusarium oxysporum),且病原菌之间的同源性高达89%,遗传差异不显著。