共查询到20条相似文献,搜索用时 62 毫秒
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正2016年,益阳市资阳区沙头镇引进湖南南星养殖有限公司(以下简称公司),公司投资2000万元在富兴村建立高标准稻蛙共生基地66.7公顷。2017年,基地黑斑蛙产量65万公斤,生产的"蛙稻香"大米获得国家绿色食品认证,成为益阳市规模最大的稻蛙共生产业基地和益阳市产业扶贫项目。2017年,益阳市农业委员会下拨扶贫专项资金11.4万元,作为富兴村38户贫困户的股金入股公司,平均每户入股资金3000元。入股资 相似文献
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2016—2018年,连云港市黑斑蛙养殖产业发展迅速,现已成为当地最重要的野生动物繁育产业,但在养殖管理、养殖技术、养殖设施、营销模式和养殖产业化方面仍存在一定问题。本文对连云港市2016—2018年黑斑蛙养殖产业发展情况及存在的问题进行深入分析,分别从科研投入、建立黑斑蛙生态养殖示范基地、拓展黑斑蛙养殖产业化等方面提出发展对策,以期为黑斑蛙养殖产业发展提供参考。 相似文献
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浙江省棘胸蛙养殖现状及发展对策 总被引:2,自引:0,他引:2
《浙江农业科学》2015,(7)
浙江省棘胸蛙产业经多年发展,已经初具规模,相关生物学研究和养殖技术都有较大突破,成为极具潜力的养殖品种。本文基于对全省棘胸蛙养殖产业的调查,分析存在的问题,提出对策,以期促进浙江省棘胸蛙养殖产业的健康发展。 相似文献
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基于常德市鼎城区星宇黑斑蛙养殖专业合作社在洞庭湖区稻田养殖黑斑蛙的成功经验,从黑斑蛙养殖基础设施建设、繁殖技术、饲养管理、主要病害及防治、养殖效益和存在的风险分析五个方面梳理总结养殖管理技术要点,为黑斑蛙养殖户提供参考。 相似文献
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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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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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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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WILLIAMS TI 《Science (New York, N.Y.)》1960,132(3436):1296-1297
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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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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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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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Wood NV 《Science (New York, N.Y.)》1947,105(2733):531-532