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利用不同浓度(0,100,200,400,600 mg/L)的赤霉素对喀斯特山区野生燕麦种子进行处理,测定其种子萌发活力.结果表明:除25℃、600mg/L赤霉素浓度处理条件会对种子的发芽势产生一定抑制作用外,其余条件下萌发的种子,发芽势、发芽率会随着赤霉素浓度的增加而提高.在25℃条件下,400mg/L赤霉素浓度处理种子的萌发效果最佳,其发芽势、发芽率和发芽指数达到最高,分别为54%、92%、6.67. 相似文献
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目的:筛选能有效提高防风种子发芽率的外源物质,为解决防风生产中存在的发芽率低、出苗缓慢等实际问题提供技术依据.方法:在20℃黑暗条件下,用青霉素、赤霉素(GA3)、KNO3溶液及40℃温水浸种20 min+ 400 mg/L青霉素溶液对防风种子进行24 h发芽预处理.结果:不同浓度的青霉素对防风种子的发芽均无明显的促进作用,各处理间差异不显著;40℃温水浸种20 min+ 400 mg/L的青霉素处理可以显著提高防风种子的发芽率,但对发芽势和发芽指数无显著影响;400 mg/L和500 mg/L的赤霉素处理均可显著地提高防风种子的发芽势、发芽率和发芽指数,其中400 mg/L的赤霉素处理与对照相比达极显著水平,分别较对照提高44.53%、7.79%和22.51%;0.3%的KNO3处理可有效提高防风种子的发芽势、发芽率和发芽指数,分别较对照提高50.59%、10.33%和23.53%.结论:400 mg/L的赤霉素处理与0.3%的KNO3处理对防风种子的萌发均具有显著促进作用. 相似文献
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低温及赤霉素处理丝棉木种子对其发芽力的影响 总被引:1,自引:0,他引:1
以丝棉木种子为材料,采用不同浓度赤霉素处理,结合低温层积,对丝棉木种子发芽进行试验研究.结果表明:赤霉素处理能极显著提高丝棉木种子发芽率、发芽势和发芽指数.经过低温处理30 d的丝棉木种子,播种前用赤霉素浓度150mg/L浸泡24 h可有效提高种子的发芽力;未经低温处理的丝棉木种子,播种前用赤霉素浓度3 000 mg/L浸泡24 h,可有效提高种子的发芽力,从而取代低温层积处理的过程. 相似文献
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前人研究表明,使用赤霉素药液处理甜瓜、西葫芦等植物的陈年种子,可对其萌发有促进作用。然而,国内外关于赤霉素处理包瓜种子的报道很少。本试验设置了150 mg/L、250 mg/L和350 mg/L三种不同浓度的赤霉素以及8 h和12 h两种不同浸种时间对陈年包瓜种子进行浸泡处理,筛选出最佳浸种浓度和时间来改善包瓜陈年种子的萌发情况,为指导蔬果生产提供理论依据。试验的结果显示,用浓度为350 mg/L赤霉素药液处理种子8 h后陈年包瓜种子的发芽势最高,为0.42。用150 mg/L、250 mg/L和350 mg/L三种赤霉素浓度处理8 h后可促进陈年包瓜种子根重增加。各处理组合较对照组能明显提高陈年包瓜种子的发芽势,但对陈年包瓜种子发芽率的影响并不明显。 相似文献
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采用单因素方差分析的方法,研究了吲哚乙酸(IAA)、6-苄基腺嘌呤(6-BA)和赤霉素(GA3)对油松种子萌发的影响.设置8个浓度梯度:0,20,40,60,80,100,150,200 mg/L,测定油松种子的发芽率和发芽势.结果显示:吲哚乙酸(IAA)、6-苄基腺嘌呤(6-BA)和赤霉素(GA3)浓度分别是20,60 mg/L和80 mg/L时,对油松种子萌发有明显的促进作用,发芽率和发芽势显著提高,但超过此浓度则可抑制种子萌发. 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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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
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The cotyledon and hypocotyl of eight varieties of alfalfa( Medicago sativa L. )are used to study the effect of different cultivation procedures and genotypes on embryogenic callus and embryoid induction,plant development and transplant of alfalfa.The varieties of alfalfa with high embryoid induction rate and high differentiation rate are screened. A high frequency regeneration system for alfalfa tissue culture is established:which is benifical to the gene transformation of alfalfa. 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