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不同处理方法对商陆种子发芽率的影响 总被引:1,自引:1,他引:0
通过对商陆种子进行多种播前处理,结果发现,浓硫酸浸泡处理20min对破除种子硬实最有效;浓硫酸处理商陆种子20min后再用赤霉素处理,种子发芽率和胚根长度都以500mg/L的GA处理最有效,差异最明显;赤霉素处理种子1h,也可以提高种子发芽率、发芽势、胚根长度;以400mg/L或500mg/L效果最好。用15%H2O2处理种子8h可有效提高种子发芽率;用15%H2O2浸泡8h再用赤霉素浸泡1h,种子的发芽率和胚根长度与对照之间存在着极显著差异,以400mg/L或500mg/L赤霉素效果最好。 相似文献
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不同方法破除黄花苜蓿新品系种子硬实的效果研究 总被引:1,自引:0,他引:1
《种子》2020,(6)
为获得破除黄花苜蓿新品系种子硬实特性的最佳方法,采用低温,液氮,热水浸种,高温干燥,砂纸打磨,激素(赤霉素GA),酸(HCl、H_2SO_4)、碱(NaOH)、盐(KMnO_4、KNO_3、NaCl)和双氧水(H_2O_2)13种处理方法,对破除黄花苜蓿新品系种子硬实的效果开展研究。结果表明:适度砂纸打磨处理效果最好,能完全破除黄花苜蓿的种子硬实,发芽率可达98%;其次是98%浓硫酸处理种子25~60 min,硬实率可下降到16%以下,即发芽率可达84%以上;再次是100℃热水处理,能使发芽率提高到62%,硬实率降至38%。3~15 min的液氮处理,也能使发芽率达62%~64%,但幼苗在后期生长过程中死亡率高达20%~26%,不宜采用。其它处理,如70℃高温干燥0.5~3 h处理,-18℃7 d的处理等,与对照相比效果显著(p0.05),但处理后的种子硬实率依然在45%以上,在生产中的实际应用价值较小。KNO_3的所有处理对破除参试黄花苜蓿种子硬实的效果均不显著。 相似文献
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不同处理方法对白花曼陀罗种子萌发的影响 总被引:2,自引:0,他引:2
以贵州中部地带野生白花曼陀罗种子作为实验材料,用蒸馏水浸种24 h作为对照组,采用砂纸摩擦处理、开水烫种处理、双氧水处理、硝酸钾处理和高锰酸钾处理种子,并对处理后种子的发芽势和发芽率进行记录,结果表明:(1)硝酸钾处理、开水烫种处理和砂纸摩擦处理均可提高白花曼陀罗种子的发芽势和发芽率;硝酸钾处理浓度在0.3%时白花曼陀罗种子的发芽势和发芽率最高,分别为11%和56%;开水烫种时间为90 s时,发芽势和发芽率分别为10%和46%;经砂纸摩擦处理的种子发芽势和发芽率分别为8.33%和34.67%;(2)高锰酸钾处理对白花曼陀罗种子的发芽没有促进作用;30%双氧水处理则抑制白花曼陀罗种子的萌发。 相似文献
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不同处理对打破野生黄花苜蓿种子硬实的效果研究 总被引:1,自引:0,他引:1
为了探索打破锡林浩特野生黄花苜蓿种子硬实的适宜方法,提高种子发芽率,分别采用6种不同方法处理种子。结果表明:切割处理的种子发芽率达到98.50%,硬实完全破除,砂纸打磨发芽率达到93.00%,硬实率下降到4.00%;浓硫酸处理15~50 min,发芽率均达到95%以上,硬实完全破除;100℃热水浸种对破除硬实效果显著,但发芽率(69.00%)相对较低;液氮处理5~20min,均能不同程度地打破种子硬实,提高发芽率,但幼苗均呈现不同程度的损伤;0.3%高锰酸钾处理1~6h对破除种子硬实效果不显著。 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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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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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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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