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对延庆县等地葡萄园受冻情况进行的调查结果表明：葡萄品种间抗寒性有明显的差异；栽培地点的不同冻害发生严重程度明显不同；葡萄园栽培管理技术对葡萄植株能否安全越冬至关重要，尤其是冬灌、埋土防寒以及前一年病虫害发生情况等均与冻害严重程度有密切的关系。 相似文献
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<正>"你看嘛,我在同一块地头采用避雨和露天两种不同栽培模式种植的葡萄,面对今年恶劣气候,就是两种不同的命运。避雨栽培亩入至少有2万元;而露天栽培的葡萄分文不值,让我蒙受不小损失。"近日,在四川省泸州市纳溪区棉花坡镇高洞村种植大户朱孝国的葡萄地头,朱孝国不无心疼地说。笔者在朱孝国的葡萄园看到,眼前景象就是两个不同的天地,朱孝国的葡萄园一边为避雨栽培,一边为露天栽培,虽然均采取套袋等技术种植,但露 相似文献
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以解决新疆石河子1.27万hm2新植葡萄产区严重冬季冻害为研究目标,在石河子3个不同物候区域24个观察点,对近几年引进的美国大粒无核品种如无核白鸡心等、本地栽培品种无核紫等10多个规模种植的品种,进行了连续4年葡萄根系和枝条冬季冻害调查,以此数据为基础,总结了石河子葡萄冬季冻害发生规律,从种苗选择、定植方式、葡萄采摘、秋季控水等关键管理环节,提出了有效预防根系和枝条冻害的技术措施。 相似文献
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吴斌 《农产品加工．学刊》2013,(10)
葡萄作为世界性的重要经济水果，价值很高，也是我国六大水果之一，长江南北普遍种植。随着气候的变化，葡萄的冻害也时有发生。它有外部因素和内部因素之分，发生冻害主要外部因素是管理水平、较长时间的低温和温度变化剧烈而引起的，其内部因素是植物体内的各种分泌激素、营养成分对葡萄有一定的抗性影响，植物体的不同部位和不同的品种间其受害程度也有所不同，还有一个直接原因是寒潮侵入的时间、强度、持续的时间长短，以及当时气象上的综合因素都是造成冻害较重的重要直接原因。 相似文献
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正气灼病与日灼病是葡萄栽培过程中两种不同的生理性病害,露地栽培、避雨栽培、套袋栽培等栽培方式均有不同程度发生。虽然两种病害都属于生理性病害,但在发病部位、危害程度、导致发病因素等方面均有一定差别,果农应注意区分和采取正确方法防治。 相似文献
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介绍了运用冷冻干燥技术进行速溶蛋花汤的加工,研究了生产工艺、特点以及影响产品质量的主要因素。试验表明,采用冷冻干燥技术加工的速溶蛋花汤,具有营养丰富、风味独特、方便快捷等特点。 相似文献
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DENG Zhao-jing 《保鲜与加工》2005,(1):153-156
A new definition of inertia,i.e. the momentum is the measuring of inertia of matter, is proposed. The article through and etc., subjects, the correctness of the new notion of inertia:The monentum is the measuring of inertia has been demonstrated, and the unsolved contradictions of the traditional definition of inetia. And the mass is the measuring of inertia has been revealed. 相似文献
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香蕉是热带亚热带发展中国家重要的粮食作物和碳水化合物来源。但近年来,香蕉生产受到严重的病虫危害。大多数香蕉栽培品种是三倍体,生长周期长,而且不孕。由于没有种子,给繁殖和育种带来一定的困难。遗传转化技术的发展为香蕉品种的改良提供了一种有效的手段。香蕉的遗传转化方法有电激法、基因枪法、农杆菌介导法等。农杆菌介导法的应用是香蕉品种改良的一个重大突破。香蕉遗传转化的外植体也发展到多种,有原生质体,胚性细胞悬浮系,分生组织,以及横切薄片等。近几年,随着分子生物学的发展,出现了转化效率更高,重复性更好的香蕉遗传转化技术。如农杆菌和基因枪结合法,离心辅助农杆菌介导法、真空渗透技术等。这些新技术新方法的出现,必将推动香蕉产业高速发展。 相似文献
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Automobile comfort dynamic simulation is necessary when we predict and evaluate the comfort of a automobile or optimize performance of automobile. The nine DOF vibration model of automobile is established , which acts root mean square value of body in multiple work conditions as comfort evaluation indices. Based on the comfort simulation, the Hongyan 1160 is predicted in the way of comfort. The programmes can be used in many different automobiles . The computational result indicates that the model can simulate vibration of automobile truly. It is significant to research automobile comfort evaluation to optimize performance of automobile and comfort simulation .The computational program can be applied to optimize or simulate which has some reference value. 相似文献
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南瓜降糖功能及其系列食品加工技术 总被引：3，自引：0，他引：3
阐述了南瓜在糖尿病辅助治疗方面的功能特性,介绍了南瓜降糖主要制品南瓜全粉、南瓜脆片、南瓜果酱和南瓜肉汁的工艺流程和操作要点。 相似文献
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母猪繁殖障碍成因分析 总被引：3，自引：0，他引：3
繁殖障碍是导致母猪淘汰的最主要因素,直接造成母猪非生产天数延长,繁殖猪群生产效率降低,严重影响猪场的经济效益。本文作者对引起母猪繁殖障碍的多方面因素,包括营养因素（如饲养水平、饲料品质、断奶日龄）、环境因素（如温度、湿度、通风、光照）、疫病因素、生产技术及管理因素进行了详细阐述。 相似文献
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Applicability of molecular markers in the context of protection of new varieties of cucumber 总被引：2，自引：0，他引：2
G. P. Bernet S. Bramardi D. Calvache E. A. Carbonell M. J. Asins 《Plant Breeding》2003,122(2):146-152
The growing number of candidate varieties presented every year at each national Plant Variety Protection Office and their decreasing genetic variability forces strategies to be adopted that will reduce costs without losing rigour when deciding about the acceptance or rejection of a candidate variety. Molecular markers have been envisaged as a reliable tool to establish differences, but can molecular markers be used for assessing distinctness? A comparison between a molecular and a morphological characterization of 41 seed samples belonging to 36 cucumber varieties and including several external controls has been carried out to investigate the applicability of molecular markers in the context of distinctness, uniformity and stability (DUS) tests and the protection of new varieties. Both types of character indicate the same relationships among main groups, Dutch and Beth‐Alpha types, and Gerking and Slice types, the correlation between distance matrices being only 0.6489. Varieties considered uniform for morphological traits proved not to be so for molecular markers. Therefore, molecular characterization is not offering the same estimates of uniformity and relatedness between varieties as does morphological characterization. External controls were used to establish distinction limits with morphological and molecular dendrograms to focus on those varieties, which were suspiciously similar. The results with cucumber show that molecular identity could be used to assess any lack of distinctness and so corroborate the morphological assessment of candidate varieties. The morphological trait ‘type’ provides distinct characterization of varieties and the molecular characterization of candidate varieties could be used to design better field experiments to assess distinction within each group of morphological cucumber type. 相似文献
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