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对于商品生产的菜农来说,出售大小一致、整齐漂亮的胡萝卜,可以大大提高商品价值,增加收入。要想获得这样的效果,最重要的是得到发芽率高而且发芽整齐的种子。但是,通常的胡萝卜种子,发芽率能达到60%就算很好了。怎么能让它尽快地、整齐一致地出苗,是很有实用价 相似文献
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融合组合是集束丸粒化种子的特殊配方组合,易于生产,每个集柬丸粒化种子中含有2~5个具有平衡生长习性不同种类或品种的种子,每个品种在发芽和生长阶段可以平衡、互补。融合组合包括单种或多种集束丸粒化种子。所有品种组合都具有栽培简单、生产投入成本低的特点,发茅率达95%以上。生长周期从播种到出苗需要8~12周。融合组合适宜彩色盆栽、吊盆和大型露台盆栽应用,每盆栽植3~5株。 相似文献
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<正>胡萝卜花叶病毒病发病适温20~25℃,栽培管理条件差、干旱、蚜虫数量多时发病重。植株生长衰弱时发病也严重。发病症状花叶病毒病一般在苗期或生长中期发生,植株生长旺盛叶片受害,轻者形成明显斑驳花叶,或产生大小为1~2毫米的红斑,心叶一般不显症。重者叶片皱缩花叶,还有的叶片扭曲畸变。发生规律病原物为病毒,国外报道过的胡萝卜病毒病的毒源有胡萝卜花叶病毒、胡萝卜杂色矮缩病毒、胡萝卜薄叶病毒、胡萝卜斑驳病毒及萝卜红叶病毒。病毒可随肉质根在窖内或野生胡萝卜上越冬,传毒虫媒为埃二尾蚜和胡萝卜微管蚜及桃蚜。田间主要通过蚜虫传播,也可通过人工操作接触摩擦传毒。 相似文献
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<正>在盐碱地上种植棉花,最棘手的生产难题就是出苗难、难全苗,主要障碍因素就是盐碱。地下水矿化度越高,土壤盐碱化越重,对棉花出苗生长的影响也就越大。所以,出苗前后阶段是决定棉花能否全苗的关键时期;出苗前由于盐碱地渗透压高,种子在土壤中吸水受阻、出现水分亏缺、延长了出苗时间,种子在发芽出土过程中消耗了较多的自身能量,由此埋下了难全苗及出弱苗的隐患;出苗后幼苗的生长仍处在逆境当中,地温上升缓慢,水分失去平衡,光合速率降低,减少了 相似文献
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1主要影响
在甘肃河西走廊经常会发生春播期的低温大风天气,危害和影响制种玉米的生长发育.一方面低温大风天气会造成玉米出苗缓慢、出苗率低、不整齐,甚至会严重缺苗.部分品种组合玉米苗期生长出现植株弯曲、叶片不能正常展开等畸形. 相似文献
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速冻菜肴宫保鸡丁的工艺研究 总被引:1,自引:0,他引:1
研究了中式菜肴宫保鸡丁的加工工艺,通过单因素试验研究鸡脯肉、黄瓜、胡萝卜处理条件对宫保鸡丁感官品质的影响,采用正交组合设计优化宫保鸡丁加工工艺。结果表明,鸡脯肉100℃油炸60 s,黄瓜110℃油炸20 s,胡萝卜110℃油炸50 s,鸡脯肉、黄瓜、胡萝卜以一定的比例混合加热,加入其他辅料,然后速冻,产品微波解冻时间为6 min。 相似文献
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2003年夏秋季4~9月对14个胡萝卜品种进行了引种栽培试验,通过对出苗情况、抗逆性、果型、单果重、抽样测产产量及品质的比较,初步筛选出5个适宜在海拔1 000~1 400 m、平均温度13.9~14.5℃的冷凉地区作为夏秋季节推广品种. 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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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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Based on the relation between the incipient yield pressure and the limit of yielding in cylinder according to the elastic disabled rule, a laboratorial method of determining limit of yielding of material is designed and a set of experimental data were gained by the method. The incipient yield pressure of the cylinder is gained by analyzing the experimental data, and then the limit of yielding is gained. The laboratorial method has a good reliability as the experimental value has a little error to the theory value. It has a definite engineering signification and theory value to research the mechanical capability of material and the disabled rule of high pressure vessel. 相似文献
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基于RS与GIS技术,利用景观生态学理论及景观格局指数对布尔津县土地利用现状进行定量分析。结果显示为:(1)布尔津县以草地、林地为主要景观类型,镶嵌着耕地、水域等景观类型。(2)四个分区(即高山区、丘陵区、平原区、荒漠区)的林地资源组成差异明显,耕地、居民、交通及工矿用地集中分布在丘陵区和平原区(3)从各项指数来看,高山区的多样性指数较低;平原区是受人文因素最多的区域,景观优势度低,各种土地利用类型比例差异不大,有利于生态可持续发展,但要合理的开发利用;荒漠区生态环境相对脆弱,要加强生态环境的保护与改善。通过该研究对布尔津县的土地利用现状作一个了解,为该县乃至整个地区的景观规划和可持续发展战略提供科学依据。 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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Efficiency of water use of early plantings of sunflower 总被引:4,自引:0,他引:4
M. Auxiliadora Soriano Francisco Orgaz Francisco J. Villalobos Elías Fereres 《European Journal of Agronomy》2004,21(4):465-476
Rain fed crop production in Mediterranean environments depends to a large extent on strategies that avoid the intense summer drought. Early plantings of sunflower have given consistently higher yields in such environments, but the basis for such yield increases has not been explored. We conducted two field experiments at Cordoba (Spain) to investigate the effects of an early and a late planting date on the components of water-limited crop productivity; namely, water use (T), water use efficiency (TE) and harvest index (HI) of sunflower. The results were generalized by simulating rain fed sunflower yields, under early (1 January) and late (15 March) plantings, for a 25-year period with the aid of a simulation model of the Ceres type (OILCROP-SUN) which has been validated in Cordoba. Experimental seed yields of early plantings in 1989 and 1996 were 2.0 and 3.0 t ha−1, while late plantings yields were 1.3 and 2.4 t ha−1, for the 2 years. Average simulated yields were 2.7 ± 1.1 and 1.9 ± 0.7 t ha−1 for early and late plantings, respectively. For the 2 years, T of early plantings was higher than that of late plantings, but the response of TE and HI to planting date was not the same in the two experiments. In the simulation exercise, T and TE of early plantings were consistently higher than those of late plantings, while there were no differences in the HI for the two planting dates. We conclude that early plantings of sunflower increase rain fed yields by increasing both T and TE, while the impact of planting date on HI very much depends on the crop water stress pattern, which is quite variable from year to year even in the predictable Mediterranean environment. 相似文献