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为提高独头蒜在青海高原地区的增产潜力,本研究以‘乐都紫皮大蒜’为试材,采用正交实验设计,研究了播期、种瓣大小和种植密度三种因子对大蒜植株生长指标、独头率及小区独头蒜产量的影响。结果表明:三个因素对独头蒜生产的影响依次为:播期>种植密度>种瓣大小。在不同因素对大蒜生长指标的主效应分析中,播期、种瓣大小和种植密度均对大蒜植株的株高和最大叶长有极显著影响,而对最大叶宽、叶片数和假茎粗无显著影响。另外,播期为SD1 (2021-04-14)的独头率达42%,小区独头蒜产量达0.69 kg,显著高于SD2 (2021-04-26)、SD3 (2021-05-08)的独头率和小区独头蒜产量;小种瓣的独头率达39%,小区独头蒜产量达0.62 kg,显著高于中种瓣和大种瓣的独头率和小区独头蒜产量;种植密度为12 cm×8 cm的独头率达38.3%,小区独头蒜产量达0.67 kg,显著高于密度为12 cm×4 cm和12 cm×12 cm的独头率和小区独头蒜产量。综上所述,播期、种瓣大小和种植密度三种因素最佳组合为A1B1C2,即播期为SD1、种瓣大小为小和种植密度为12 cm×8 cm。本... 相似文献
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麻江红蒜近几年倍受消费者的喜爱,在市场上供不应求。选择好种植土壤和品种、精细整地、施足底肥、适时播种、搞好田间管理、防治好病虫害能使红蒜种植获得丰收。 相似文献
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“泡蒜”是在大蒜种植过程中经常出现的一种现象,其表现为:植株生长旺盛健壮,叶色正常,鳞茎较一般蒜头大,但果皮内无蒜瓣,只在近根部位有类似于蒜瓣的聚集物,每粒有麦粒大小。鲁西南的蒜农称这种大蒜为“泡蒜”、“汽蒜”,也有叫“假洋葱”的。近年来,随着大蒜种植面积的迅速扩大,泡蒜的发生也越来越严重,轻则使大蒜减产20%左右,重则绝产。 相似文献
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1.选好品种以采收早蒜薹为主时,可选用蔡家坡紫皮蒜或洋县紫皮蒜等叶片宽、生长发育快的早熟品种;以采收晚蒜薹和蒜头为主时,可选用叶片窄、生长发育慢、蒜头较大的蔡家坡白皮蒜等晚熟品种。2.茬口选择以小麦茬为宜,忌重茬,已种植过葱、蒜、韭的地块,应间隔3年以上再种植大蒜。 相似文献
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<正> 蒜田杂草的发生与其他作物有很大不同,它具有发生早、种类多、周期长等特点。一般大蒜种植季节是各类杂草种子的成熟季节,种得早杂草发生得也早,再加上地膜覆盖后地温的升高,更有利于杂草的滋生。目前又到了大蒜的种植季节,有关专家提醒各地,对蒜田杂草应及早防治。种植大蒜时茬口不同,杂草种类也有很大的不同,使用一种除草 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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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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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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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