共查询到20条相似文献,搜索用时 78 毫秒
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水果、茶叶两个产业具有较多的共性,是我国入世后有较强竞争优势的产业之一,也是近年来推进种植业结构调整、增加农民收入的“亮点”。改革开放以来,我国的水果、茶叶生产得到长足发展。各地抓住农业结构战略性调整和加入世贸组织的有利时机,发挥比较优势,加大政策措施力度,促进了果茶产业由过去的扩大面积为主的外延式扩张跨入了以提高效益为核心的内涵式发展轨道,并正朝着外向型的方向迈进。下面,就如何提升我国果茶产业的国际竞争力讲两点意见。一、进一步明确果茶产业发展的思路(一)我国果茶产业发展的优势和潜力我国果茶产业发展有优势… 相似文献
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水果、茶叶、蔬菜是我省三大特色优势产业。要实施乡村振兴战略,厚植四川优势支柱产业,打造中高端特色农产品,实现产业兴旺、产业兴省、产业强省、产业富民目标,不断满足国民美好化生活期盼,研究提升绿色优质果茶菜供给能力,已迫在眉睫、势在必行。本文旨在综述四川省果茶菜生产现状,从生产情况、销售流通情况、生产供给存在的主要问题、推动果茶菜绿色优质发展对策建议等方面进行综述。 相似文献
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湖北省今年经济作物工作指导思想是:基本稳定现有种植面积。加快品种更新改良步伐,突出标准果园和标准茶园建设,重点发展龙头企业和专业合作组织,建设大板块,培植大龙头,打造大品牌,发展大产业,全力推进产业化经营。在工作方式上努力实现三大转变,一是由过去注重抓发展、扩面积、重数量为主向优质、高效、安全转变,发展优质、高产、高效、生态、安全果茶产业;二是由过去注重抓生产, 相似文献
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《山西农业:致富科技版》2004,(1)
农业部决定,2004年起在全国实施“果茶产业竞争力提升计划”,“苹果出口促进行动”将作为该计划最先实施项目先行启动。围绕实施“果茶产业竞争力提升计划”,今后将重点抓好五方面工作。①制定和实施优势区域布局规划,加速形成果茶产业带。②加大良种苗木体系建设与管理力度,夯 相似文献
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福建省上杭县在果品销售价格低迷时期,通过出台多项扶持政策,3年新增果茶面积2.2万亩,增长19.1%。引进水果新品种50多个,筛选推广近10个水果新品种,建成千亩蜜雪梨专业村、万亩蜜柚专业乡镇。开展科技攻关,培育出杭晚蜜柚新品种,研究项目获省科技进步奖。着力推进"一村一品、一乡一产业"发展,培育达标专业村44个。利用地理优势,发展观光果园,促进果品销售。加强科技培训,推广现代栽培技术和果园新农机具,探索果业发展新路径。 相似文献
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ICP-OES法同时测定果蔬中铅、砷、镉、铬、铜、锡含量 总被引:2,自引:0,他引:2
果蔬样品经混酸消化后,控制一定的酸度,定容后应用等离子体发射光谱法(ICP-OES)对果蔬中铅、砷、镉、铬、铜、锡六种有害重金属进行测定,研究了分析测定条件,方法简单快速。测定结果表明,五种元素的加标平均回收率在91.0%~107%之间。其RSD均小于3.5%。按该方法进行处理及测定铅、砷、镉、铬、铜、锡,在选择的测定条件下最低检出限分别为0.0006 mg/kg、0.0003 mg/kg、0.00003 mg/kg、0.00005 mg/kg、0.00003 mg/kg、0.0006 mg/kg。 相似文献
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Segregation of form, color, movement, and depth: anatomy, physiology, and perception 总被引:63,自引:0,他引:63
Anatomical and physiological observations in monkeys indicate that the primate visual system consists of several separate and independent subdivisions that analyze different aspects of the same retinal image: cells in cortical visual areas 1 and 2 and higher visual areas are segregated into three interdigitating subdivisions that differ in their selectivity for color, stereopsis, movement, and orientation. The pathways selective for form and color seem to be derived mainly from the parvocellular geniculate subdivisions, the depth- and movement-selective components from the magnocellular. At lower levels, in the retina and in the geniculate, cells in these two subdivisions differ in their color selectivity, contrast sensitivity, temporal properties, and spatial resolution. These major differences in the properties of cells at lower levels in each of the subdivisions led to the prediction that different visual functions, such as color, depth, movement, and form perception, should exhibit corresponding differences. Human perceptual experiments are remarkably consistent with these predictions. Moreover, perceptual experiments can be designed to ask which subdivisions of the system are responsible for particular visual abilities, such as figure/ground discrimination or perception of depth from perspective or relative movement--functions that might be difficult to deduce from single-cell response properties. 相似文献
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本试验以菜豆品种先行者为试材,采用32孔、50孔两种规格穴盘,设置10、15、20、25 d等4个苗龄段,通过研究不同穴盘规格和苗龄对菜豆性状及产量的影响,筛选出适合菜豆育苗的穴盘规格和适宜的苗龄。结果表明:穴盘育苗的营养面积增大,菜豆产量随之增加,25 d苗龄条件下,32孔穴盘的前期产量和总产量均显著高于50孔穴盘;随着苗龄的增长,菜豆的前期产量和总产量呈增加趋势,其中25 d苗龄的产量显著高于其他苗龄。综合上述各项指标,菜豆育苗阶段,10 d苗龄可选用32孔、50孔穴盘,15 d以上秧苗选用32孔穴盘为宜。 相似文献
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WILLIAMS TI 《Science (New York, N.Y.)》1960,132(3436):1296-1297
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通过野外调查、标本采集、分类学研究及资料考证,基本摸清了贵州樟科、莲叶桐科、景天科、堇菜科、柳叶菜科、鹿蹄草科、柿科、山矾科、木犀科等9个科药用植物资源的种类与地理分布.结果发现贵州现有樟科药用植物49种4变种,莲叶桐科药用植物5种,景天科药用植物21种,堇菜科药用植物19种1变种,柳叶菜科药用植物20种4变种,鹿蹄草科药用植物7种1变种,柿科药用植物9种1变种,山矾科药用植物12种,木犀科药用植物30种3变种.其中,4种为贵州特有药用植物,40种5变种为贵州药用新资源. 相似文献
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The primary rocks are a sequence of titanium-rich basic volcanics, composed of clinopyroxene, plagioclase, and ilmenite with minor olivine, troilite, and native iron. The soil and microbreccias are respectively loose and compacted mixtures of fragments and aggregates of similar rocks, minerals, and glassy fragments and spheres. Impact events are reflected by the presence of shock metamorphosed rock fragments, breccias, and glasses and their resulting compaction to form complex breccias, glass-spattered surfaces, and numerous glass-lined craters. Chemistry of the glasses formed by the impact events is highly variable, and the high iron and nickel content of a few moundlike features suggests that at least some of the projectiles are iron and nickel-rich meteorites. 相似文献
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The finding of appreciable quantities of p,p'-DDT after feeding o,p'-DDT to rats led to the proposal of a theory, that an isomeric metabolic conversion occurs. The presence of p,p'-DDT as an impurity in supposedly pure samples of o,p'-DDT is the correct explanation for the appearance of p,p'-DDT. Purified o,p'-DDT and (14)C-labeled o,p'-DDT yielded no data to support the idea that o,p'-DDT is converted to the p,p'-DDT isomer. 相似文献
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重金属稀土元素污染在水生物体内的生物富集 总被引:2,自引:0,他引:2
对铅、镉、汞以及镧、铈在鲤鱼体内的生物富集作用进行了室内试验和讨论。结果表明,重金属及稀土元素在鱼体各部位均有较强的富集作用,其中肌肉部分富集能力较弱,内脏富集能力最强;鱼体各部位对重金属及稀土元素的富集作用随时间的增加而增加,在一定的时间后趋于平衡;并且,鱼体中各部位对重金属及稀土元素的生物富集作用存在较大差异。 相似文献