共查询到20条相似文献，搜索用时 937 毫秒
1.
随着全球性生活水平提高,目前世界茶叶消费结构发生了很大变化,总的特点是高档茶供不应求,低档茶滞销积压.据联合国贸发会统计,每年全世界约有10—15万吨低档茶积压滞销.为此,世界一些茶叶主产主销国,一方面调整茶类结构,扩大名优茶生产,限制低档茶生产和进口;另一方面积极开展中低档茶综合开发利用研究.尤其是近 相似文献
2.
肉桂是武夷岩茶的后起之秀。改革开放以来，武夷山市的肉桂品种发展迅速，茶园从1984年的66公顷发展到1997年的2133公顷，十三年增长323倍；产量从1984年的2吨多提高到1997年的257.64吨，增长126.8倍。但由于市场经济管理体系不完善，生产者对发展肉桂存在着盲目性，产销一直处于混乱状态。致使1997年肉桂芝茶滞销较严重，给武夷山市茶农造成了经济损失。本文就肉桂岩茶为何会出现滞销和怎样促销进行探讨。一、肉桂滞销原因分析（一）盲目发展，肥培管理跟不上，鲜叶内含物发生变化，影响成茶品质的提高。肉桂品种原产地在武夷山和星村沿着… 相似文献
3.
当前,口岸对茶叶的验收,基本上是靠感官指标,弹性很大,验收的松紧往往受茶叶畅销与否的影响,茶叶滞销时,验收则偏紧,茶叶合格率就低;反之,茶叶畅销时,验收则偏松,合格率就高。自1967年执行贸易样加工以来,在1979～1981年期间,出厂茶叶品质水平有较大幅度下降,1982年以后,茶叶滞销情况逐年加重,各厂为了扩大茶叶销路,出厂的品质水 相似文献
4.
象山是浙东沿海的一个半岛县,是新茶区。1983年至1985年的茶叶滞销,使刚尝到种茶甜头的广大茶农生产积极性严重受挫,大批茶园荒芜,近万亩幼龄茶园失管,1985年茶叶产量仅750吨,产值204万元,分别比1982年降低31.8%和44.4%。1986年到1988年生产有所恢复,但是1989年后又出现了茶类结构性滞销。面对困难和变化多端的市场,我们及时调整了茶类结构,大力 相似文献
5.
小桥镇是建瓯市的重点产茶乡镇，现有茶园栽培面积约1．7万亩，近90％为水仙品种。近年来，由于受国内外茶叶市场的影响，时常出现滞销情况，严重影响了茶农的生产积极性。为了改变我镇茶叶目前滞销和效益低下状况，提高适应市场的变化需求和质量效益，笔者于2006年春茶期间，开展闽北水仙轻发酵包揉型乌龙茶制法的探索和实验，取得较为明显的成效。现将实验结果初报如下： 相似文献
6.
1983年,我省茶叶严重滞销,为寻求对策,茶业界人士纷纷提出“以质取胜”的主张。春茶在各季茶中品质最好,比重也最大,因此提高春茶产量及其在全年中的比 相似文献
7.
我省在发展棉花生产上,过去只注重原棉的产量和外观质量,忽视了棉纤维内在品质的改进和提高,致使有些棉区生产的原棉滞销,但因安庆棉区生产的原棉品质较优,国内各纺织厂竞相争购。可见提高原棉品质 相似文献
8.
据马来西亚《星洲日报》 《热带作物学报》2009,(1):14-14
2008年12月31日,马来西亚橡胶总会副主席杨建良表示,马来西亚、泰国和印度尼西亚必须共同设立目标,鼓励小胶园主在未来的5年内将老树更新,才能有效地减产,让胶价尽快回升,解决橡胶滞销的问题。 相似文献
9.
我国棉花产量自1982年以来,已跃居世界首位,总产量占世界棉花产量的30%左右,已由原棉进口国变为出口国。这样的发展速度在世界棉业史上是罕见的。然而,当前又出现了棉布滞销,原棉积压的新问 相似文献
10.
11.
Sena L.P. VanderJagt D.J. Rivera C. Tsin A.T.C. Muhamadu I. Mahamadou O. Millson M. Pastuszyn A. Glew R.H. 《Plant foods for human nutrition (Dordrecht, Netherlands)》1998,52(1):17-30
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. 相似文献
12.
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。 相似文献
13.
14.
橡胶树丛枝病病原的抗血清制备与应用 总被引：5，自引：1，他引：4
以感染橡胶树丛枝病病原的长春花为材料,制备得到橡胶丛枝病病原菌抽提液,以抽提液为抗原免疫家兔,制备抗血清,经微量沉淀测定,抗血清效价为１：２０４８。应用橡胶丛枝病抗血清检测橡胶褐皮病,无症苗木检出率达３０％－３７％,可疑的褐皮病树检出率达８５．７％。 相似文献
15.
以‘福桐’、‘绿桐’2个无性系与10个不同种源的白花泡桐个体为研究对象，采用ISSR分子标记对12份白花泡桐材料的亲缘关系进行研究，并利用DPSv3.01进行聚类分析。结果表明：10条引物共扩增出66条条带，其中有37条多态带，多态性比例为56.1%。根据ISSR聚类分析结果，在遗传距离为0.35时，12份白花泡桐材料可分为5类，第1类为‘福桐’无性系与河南、河北种源个体；第2类为‘绿桐’无性系与湖南、湖北、江苏种源个体；第3类为浙江、广东种源个体；第4类为江西、福建种源个体；第5类为广西种源个体。此结果 相似文献
16.
17.
18.
R. W. Summers 《Crop Protection》1989,8(6):451-454
One hundred and fifty-six pre-roost gatherings of starlings were observed at 28 sites around a roost in west Norfolk during winter. Pre-roost gatherings occurred more frequently at individual farmyards compared with individual fields, but 82% of the sites where gatherings occurred were on fields. The size of gatherings was greater, the closer to the roost. Birds in pre-roost gatherings on fields of autumn-sown winter wheat spent most of the time feeding and had a diet composed almost exclusively of wheat seeds. Birds in gatherings on grass fields also fed intensively whereas only 31% of birds at farmyards were feeding. The implications that these results have with regard to potential damage to fields of winter wheat and around farmyards are discussed. 相似文献
19.
为深入研究昆虫病原真菌蝉拟青霉疏水蛋白PChyd基因的功能,根据蝉拟青霉基因组信息克隆疏水蛋白PChyd基因,对该基因序列进行生物信息学分析,使用qRT-PCR技术对其在不同培养条件或阶段下的表达模式进行分析,并通过酶切酶连的方法构建了该基因的敲除载体。结果表明：PChyd基因的开放阅读框序列全长303 bp,编码100 aa,包含22 aa的信号肽序列和70 aa疏水蛋白功能区域。系统发育分析显示该基因与粗糙虫草菌亲缘关系最近。qRT-PCR结果显示PChyd基因在PDA培养的菌丝体、诱导的附着胞、诱导的芽生孢子中表达量显著高于另外2个样品,其中芽生孢子表达量最高,暗示该基因在蝉拟青霉侵染初期和在昆虫血腔中定殖阶段可能具有重要作用。凝胶电泳结果表明,成功构建了该基因的敲除载体,扩增出含有上臂、HPH、下臂的3356 bp左右的片段。本研究为进一步探究蝉拟青霉疏水蛋白PChyd基因的致病机理、生防工程菌的改造奠定了基础。 相似文献
20.
The characterisation of the wheat endosperm by mechanical tests of compression highlighted a relation between the rupture energy and the elasticity modulus for different varieties of wheat; this relation allows us to distinguish mealy and vitreous endosperms. An approach based on the micromechanics of cohesive granular materials is used to analyse these experimental results. A geometrical model of the wheat endosperm made of grains linked by cohesive bonds is proposed. We introduced two parameters, the first one α represents the percentage of active bonds (bonds where the stiffness and strength are non-zero), and the second one β represents the threshold of the bond's rupture. The parameter β can be related to the cross-section of the bond. This model successfully describes the mechanical tests on the wheat endosperm. The comparison with the experimental tests makes it possible to clearly differentiate vitreous wheats and mealy wheats and then attribute this property to the parameter β. The model shows the same tendency as regards the evolution of the rupture energy and the elastic modulus with the parameter α. The modelling of endosperm by the mechanics of cohesive granular media provides a new theoretical framework to interpret the rheology of endosperm. This approach allows us to connect this rheology to the mechanical actions at the scale of the granules. 相似文献