不同红蓝LED光照时间对冰菜生长和品质的影响   总被引：1，自引：0，他引：1  

赵明伟  吕新  张泽  刘慧英  牛宁儿  崔金霞 《新疆农业科学》2021,58(1):80-91

[目的]研究不同红蓝光照时间对冰菜生长发育的影响,分析其生长发育规律.[方法]以冰菜为研究对象,以红蓝光为人工光源,在植物工厂及水培条件下,采用可循环营养液(EC2.8 dS/m,pH6.5),待冰菜幼苗长至4片叶后移植到水培立体培养系统中,设置红光与蓝光比例为(3:1),光强统一设定为300μmol/(m2·s),补...  相似文献   

Expression of HSP70 in response to heat-shock and its cDNA cloning from Mediterranean blue mussel   总被引：1，自引：0，他引：1  

Haruhiko?ToyoharaEmail author  Masatomi?Hosoi  Isao?Hayashi  Satoshi?Kubota  Hisashi?Hashimoto  Yoshihiro?Yokoyama 《Fisheries Science》2005,71(2):327-332

Expression of HSP70 in response to heat-shock was investigated at the protein and mRNA levels in Mediterranean blue mussel. Western and Northern blot analyses revealed that HSP70 was expressed following heat-shock in the mantle at both protein and mRNA levels, suggesting that gene expression of HSP70 is implicated in the cellular response to heat-shock stress in mussel. It was then attempted to clone HSP70 cDNA in order to determine the primary structure of mussel HSP70. As a result, two full-length cDNA encoding HSP70 were isolated from a cDNA library prepared from the heat-shocked mantle. The isolated cDNA consist of single open reading frames of 2067 bp and 1911 bp which encode proteins of 689 amino acids and 637 amino acids, respectively. Both HSP70 cDNA encode an ATPase do main, and a substrate-binding do main in addition to a Glu-Glu-Val-Asp (EEVD) peptide motif that is specific for cytosolic HSP70. These findings suggest that the cDNA clones obtained in the present study encode cytosolic HSP70.  相似文献   

EXTERNALITIES,INSTITUTIONS AND THE LOCATION CHOICES OF SHELLFISH PRODUCERS: THE CASE OF BLUE MUSSEL FARMING IN THE MONT-SAINT-MICHEL BAY (FRANCE)     

Rémi Mongruel  Olivier Thébaud 《Aquaculture Economics & Management (Blackwell Science)》2013,17(3):163-181

ABSTRACT

Most marine aquaculture activities remain strongly dependent on coastal ecosystems. In the case of shellfish farming, this dependency is related mainly to water quality and to the various ecological interactions resulting from the dynamics of coastal food webs. Such ecological constraints have influenced the overall evolution of blue mussel farming in the Mont-Saint-Michel Bay, leading producers to negotiate collective arrangements regarding production capacity and techniques and to develop production strategies at the farm level. This article presents an analysis of the location choices of mussel farmers in the Mont-Saint-Michel Bay based on an empirical investigation conducted in 2002. A typology of farms with respect to their land structure is developed in which some farms choose to concentrate their activity in a single part of the bay while others distribute their activity more widely. Determinants of the location choices of each farm category, including distance to port, natural productivity differentials, and predation of mussel stocks, are analyzed. The role of the institutional arrangements allowing mussel farmers to develop these location strategies is also discussed.  相似文献   

Cryopreservation of strip spawned sperm using non‐programmable freezing technique in the blue mussel Mytilus galloprovincialis          下载免费PDF全文

Shiwen Liu  Tong Xu  Qing Liu  Xiaoxu Li 《Aquaculture Research》2016,47(12):3888-3898

In this study, a non‐programmable freezing technique has been developed with the strip spawned blue mussel (Mytilus galloprovincialis) sperm. The key parameters optimized including (1) cryoprotectant agents (CPAs); (2) cooling temperature; (3) thawing temperature; (4) sugar and amino acid supplementation and (5) sperm to egg ratio. The fertilization rate and/or integrity of plasma membrane and acrosome were used as sperm quality assessment indicators. The highest post‐thaw sperm fertilization rate of 95% was achieved, when sperm were cryopreservated in 8% dimethyl sulfoxide at 7.8 cm above the liquid nitrogen surface and thawed in a 60°C seawater bath. The addition of glucose, sucrose or trehalose in dimethyl sulfoxide did not, whereas 0.8% glycine did significantly improve the post‐thaw sperm fertilization rates. The fluorescent evaluation has demonstrated that the addition of glycine significantly improved the post‐thaw sperm acrosome integrity, revealing a positive role of glycine in the improvement of post‐thaw sperm quality in blue mussels.  相似文献   

我国蓝色粮仓科技创新的发展思路与实施途径   总被引：4，自引：0，他引：4  

杨红生 《水产学报》2019,43(1):97-104

蓝色粮仓建设对保障食物安全、推动经济发展、催生新兴产业、彰显国家权益、改善生态环境以及突破产业瓶颈具有重要意义。在当前科技和产业背景下,如何卓有成效地构建蓝色粮仓已成为社会各界关注的热点。本文明确了蓝色粮仓的概念和特点,分析了蓝色粮仓构建的必要性和可行性,提出了实现渔业产业由大国向强国跨越以及提升科技创新和产业发展能力的总体目标,从聚焦重大需求、构建科技创新链,坚持原创驱动、突破重大科学问题,强化集成示范、支撑产业健康持续发展等方面论述了实施途径,即按照基础研究、重大共性关键技术、典型应用示范全链条布局的要求,坚持生态优先谋划,陆海统筹布局,针对种质创制、健康养殖、资源养护、友好捕捞、流通加工五大产业类型需求,实施良种引领、空间拓展、技术升级、产业示范四大行动,建立智慧养殖、智能捕捞、绿色加工三大体系,满足优质蛋白供给和产业转型升级两大需求,最终构建中国特色的蓝色粮仓。  相似文献   

物理降温对草地早熟禾耐热性影响的研究     

姜鹏君  孙彦 《北方园艺》2009,(3)

利用温室模拟北京夏季的高温高湿环境,对草地早熟禾(Poa Pratense)在热胁迫过程中的外观质量指标(绿叶数/株,生长高度)和生理生化指标(叶片含水量、叶片相对电导率、叶绿素含量)进行研究分析,比较6种处理之间耐热性能的差异,从而选出最好的降温处理方法,为北京地区建植耐高温冷季型草坪的高效低成本养护管理提供一定的理论基础和指导意义.结果表明:在高温胁迫下,采用一定的遮荫处理可以降低温度,提高草地早熟禾耐热能力.  相似文献   

1961-2010年黄河源区蓝绿水资源时空变化   总被引：1，自引：0，他引：1  

张为彬  查小春  马玉改 《水土保持通报》2014,(6):338-343

利用SWAT(soil and water assessment tool,SWAT)模型和非参数检验方法(Mann-Kendall),从时空尺度上分析了黄河源区1961-2010年蓝绿水资源量多年平均变化和各生长季节的变化规律。研究结果表明,在时间上,近50 a来,黄河源区绿水资源量多年平均是蓝水的2倍以上。黄河源区蓝水资源春、秋两季减少,秋季显著减少,减少幅度0.355 mm/a,夏季略微增加;绿水资源春季减少,夏、秋两季增加,秋季显著增加,增加幅度0.286 mm/a。在空间上,黄河源区蓝绿水资源量在各季节呈现出由东南向西北递减的趋势,东南部地区蓝水资源秋季减少明显,减小幅度最大为1.98 mm/a,绿水资源量夏、秋两季增加明显,最大为1.62 mm/a。随全球气候的变化,蓝绿水资源量在时空上差异将会进一步加大。因此,应加强黄河源区水资源的管理,减少源区绿水尤其是其中无效用水(蒸发)的消耗,减少生长季高耗水作物的种植,以保证中下游地区水量的有序供给。  相似文献   

Preparation and photocatalytic properties of Pt and Crco doped Nano TiO2 films      

HUANG Jia mu  ZHU Xiao hong  CAI Xiao ping 《保鲜与加工》2008,(9):1018-1022

Pt and Cr co doped Nano TiO2 film was prepared by the sol gel method. The film was characterized by AFM, XRD and UV Vis. The experiment showed that when the average TiO2 film diameter is 32 nm and the film thickness is 290 nm, the rate of photodegradation is 95% in 2.5 hours. Additionally, when the optimal co doping ratio for Pt Cr is n(Pt): n(TiO2) equals 0.03% and n(Cr):n(TiO2) equals 0.4%, the photodegradation of methylene blue for Nano TiO2 film can be enhanced. The photocatalytic properties of Pt and Cr co doped Nano TiO2 film is better than that of pure TiO2 and Pt, Cr separately doped TiO2 film.  相似文献   

NaOH改性稻秆对亚甲基蓝染料吸附性能的研究     

潘云霞  刘澜  郑怀礼 《农机化研究》2012,34(8):200-203

为解决农村稻秆的资源化利用问题,将稻秆用NaOH改性做吸附剂处理亚甲基蓝染料废水;考察pH值、吸附剂投加量、染料浓度和温度对染料吸附性能的影响;分析改性稻秆对亚甲基蓝染料的吸附动力学过程。研究结果表明,亚甲基蓝浓度为150mg/L,pH值为12、吸附剂投加量为4g/L时,改性稻秆对亚甲基蓝染料有很好的去除效果,染料的吸附率达到98.1%;改性稻秆对亚甲基蓝染料的吸附符合Freundlich等温模型,最大吸附量为52.910mg/g,升高温度能够增加吸附剂对亚甲基蓝染料的吸附效果;改性稻秆吸附亚甲基蓝是一个快速吸附过程,符合伪二级吸附动力学方程。  相似文献   

不同频率LED红蓝光交替照射对生菜生长与品质的影响     

陈晓丽  杨其长  马太光  薛绪掌  乔晓军  郭文忠 《农业机械学报》2017,48(6):257-262

在全人工光型植物工厂中进行试验,运用供光模式可调的红蓝LED光源,以不同频率的红蓝光交替照射生菜,并以同比例的红蓝光同时照射生菜作为对照组,通过测定生菜生长动态、光合色素、可溶性糖、粗蛋白、维生素C以及硝酸盐含量,研究红蓝光供光模式及交替频率对生菜生长与品质的影响。结果表明:在等能耗基础上,16 h光期里,红蓝光交替1次有利于生菜地上部分生物量、可溶性糖以及粗蛋白的积累;红蓝光交替4次有利于生菜中维生素C的积累以及硝酸盐的代谢;所有处理中,叶绿素及类胡萝卜素含量均以4次和8次红蓝光交替为最大,且二者之间无显著性差异。  相似文献