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稀土元素镧对潍县萝卜陈种子活力的影响 总被引:1,自引:1,他引:0
为了揭示氯化镧对潍县萝卜陈种子活力的影响,以潍县萝卜陈种子为试材,对其进行不同时间、不同浓度氯化镧浸种处理,测定种子的发芽率、发芽势、发芽指数和活力指数。结果表明:0~10 mg/L氯化镧溶液浸种12 h和24 h,潍县萝卜种子发芽率、发芽势、发芽指数均比CK显著提高,而活力指数仅有浸种12 h得以显著提高。0~10 mg/L氯化镧浸种36 h和48 h,种子发芽率、发芽势、发芽指数都比CK有不同程度的降低,活力指数则略有升高,但都未达到显著水平。因此,在生产中可以用2.5 mg/L氯化镧溶液对潍县萝卜陈种子浸种12 h,即起到经济、有效提高种子活力的目的。 相似文献
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为研究沙棘属植物云南沙棘、江孜沙棘和肋果沙棘各采集点种实表型性状、种子发芽特性及其相关性,通过测定果实的鲜果长、宽、干果长、宽、果实含水量和种子的长度、宽度、长宽比、百粒重、种子含水量等表型性状,以及种子发芽率、发芽势、发芽指数等发芽特性,并比较浸种时间(12,24,48h)和培养温度(20,25,30℃)对种子发芽的影响。结果表明:青藏高原沙棘属3种植物各采集点种实表型性状和种子发芽特性存在显著差异;浸种24h,30℃发芽条件下,青藏高原沙棘属3个种9个采集地点种子发芽率、发芽势和发芽指数均存在显著差异,其中类乌齐县肋果沙棘发芽率(95.68%)最高,白朗县江孜沙棘(86.00%)最低;温度设定在20~30℃之间,3种沙棘植物种子发芽势和发芽指数差异显著;浸种时间12~48h时,沙棘属植物种子发芽率差异显著;浸种24h,在温度25℃和30℃条件下,沙棘属植物种子发芽率、发芽势和发芽指数最高;种子发芽势与种子发芽指数呈极显著正相关,与鲜果宽呈极显著负相关,发芽指数与鲜果宽呈极显著负相关,种子百粒重与鲜果长、种子宽呈极显著正相关。 相似文献
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为了探索梓树种子萌发的最佳处理,提高种子萌发率,为生产实践提供科学指导,研究了赤霉素(GA3)、萘乙酸(NAA)2种不同植物激素及其不同浓度,以及浸种时间对湖北和辽宁2种源地梓树种子发芽特性的影响.结果表明:NAA抑制梓树种子发芽,但GA3对梓树发芽率的提高有促进作用.不同种源梓树种子的发芽特性有差异,湖北种源种子的发芽效果优于辽宁种源.50mg/L的GA3处理12h或36h,湖北种源地种子发芽势、发芽率、发芽指数最高,而辽宁种源最高发芽特性处理为300mg/L 36h. 相似文献
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《种子》2018,(11)
刀叶金合欢种子种皮透性差,常规处理种子萌发率低。为获得更高的种子发芽率,采用浓硫酸6种不同拌种时间、4种不同水温处理种子,浸种24h后置床催芽进行比对。结果表明:1)刀叶金合欢种子的种子膨胀率、发芽势、发芽率、发芽指数与浓硫酸拌种时间长短和浸种水温高低处理关系密切;2)水温是影响刀叶金合欢种子膨胀率、发芽势、发芽率、发芽指数的主要因子,浸种处理水温越高,其种子膨胀率、发芽势、发芽率、发芽指数越大;3)浓硫酸不同拌种时间对提高种子膨胀率、发芽势、发芽率、发芽指数起重要作用,经浓硫酸不同拌种时间处理下的种子,其种子膨胀率、发芽势、发芽率、发芽指数,均高于对照处理;4)浓硫酸拌种5min+100℃水温烫种处理,其种子膨胀率、发芽率、发芽指数分别为14.8%、76.4%和2.55%,在本试验中表现最好,种子发芽势则以浓硫酸拌种1min+100℃水温烫种处理最好,达到66.8%,以上与其它处理相同因子比较,差异性也达到显著水平(p0.01)。 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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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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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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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