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为探究野生地肤的发芽特性，本试验对其休眠期、浸种时间、催芽温度等多项指标进行了测定。结果表明：野生地肤的休眠期为一个月左右，属于休眠期短的种子类型；浸种时间和催芽温度最佳处理组合为4h、20℃；在温度20℃、浸种4h的条件下，泠藏的野生地肤种子发芽率没有变化，但是发芽势增加，常温下贮藏发芽率、发芽势都有所增加；三种不同果皮颜色类型的种子的发芽率、发芽势以褐色为最好，其次是红色的，最差的是绿色的种子。 相似文献
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本文研究了增灵对玉米发芽的影响，探讨了不同浓度、不同浸种时间、不同温度等条件下玉米的发芽率、发芽势。结果表明，增灵在用水稀释1000倍时，能较好的提高玉米的发芽率和发芽势。说明了适合浓度的增灵处理玉米种子能提高种子的活力。 相似文献
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采用不同浓度的水杨酸（SA）浸泡玉米,通过测量种子发芽率、发芽势及幼苗的一些形态指标和生理指标,研究SA对玉米种子萌发及幼苗生长的影响．结果表明：SA浸种对玉米种子萌发及幼苗的生长具有显著影响,大致呈低促高抑现象． 相似文献
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对豫黄瓜2号种子进行5个不同浓度的VC溶液浸种处理,结果表明:不同处理对黄瓜种子的发芽率,发芽势和发芽指数影响不明显,但对其幼苗生长的影响较大;其中,浓度为40mgl/,80mg/l的处理对子叶面积的增大,下胚轴的缩短等有明显的效果. 相似文献
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一串红种子发芽特性研究 总被引：2，自引：0，他引：2
王少平 《河南职业技术师范学院学报》1999,27(2):30-33
研究了浸种温度、浸种时间、不同浓度ＫＮＯｂｌ溶液润湿发芽床对一串红种子发芽特性的影响。试验结果表明：浸种温度对一串红种子的发芽率、发芽势及发芽的指数有极显著影响,且以２０～２５℃处理效果最佳。而浸种时间及不同浓度ＫＮＯ３溶液润湿发芽对一串红种子的发芽影响不大。 相似文献
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不同浸种时间对辣椒种子活力的影响 总被引：6，自引：0，他引：6
对4个辣椒品种种子进行5个不同浸种时间处理,结果表明,不同浸种时间对各个品种种子发芽率均没有影响.但对其发芽势和发芽指数影响达到极显著水平,在0～16h范围内,随着浸种时间的延长,其发芽势和发芽指数均呈逐渐降低的趋势. 相似文献
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水杨酸浸种对NaCl胁迫下辣椒种子活力及抗盐性的影响 总被引：1，自引：0，他引：1
以辣椒种子为实验材料,用不同浓度的水杨酸（SA）浸种和对辣椒幼苗进行根部处理,研究100mmol／LNaCl胁迫对辣椒种子活力及抗盐性的影响．结果表明：一定浓度SA可以缓解辣椒种子盐害,提高其发芽率、发芽势,保护细胞膜的通透性,降低种子浸出液电导率和丙二醛（MDA）含量,缓解辣椒幼苗细胞膜脂过氧化．但超过一定浓度的SA则会抑制辣椒种子的萌发,使种子浸出液电导率和丙二醛含量升高． 相似文献
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采用培养皿发芽法,研究了水杨酸浸种对盐胁迫下西瓜种子萌发和幼苗生长的影响。结果表明,300mmol/L NaCl溶液浸种显著降低了西瓜种子的发芽率、发芽势、发芽指数和活力指数及胚根长和胚芽鲜重;1.0mmol/L以下浓度水杨酸浸种使盐胁迫下西瓜种子萌发和幼苗生长量随水杨酸浓度提高而显著增加;2.0 mmol/L水杨酸浸种对盐胁迫下西瓜种子萌发和幼苗生长无明显影响,3.0 mmol/L水杨酸浸种进一步降低了盐胁迫下西瓜种子萌发和幼苗生长量。结果说明,较低浓度水杨酸浸种可缓解盐胁迫对西瓜种子萌发和幼苗生长的抑制作用,减轻西瓜种子萌发期盐胁迫伤害的最适水杨酸浓度为1.0 mmol/L。 相似文献
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田艳春 《赤峰学院学报(自然科学版)》2014,(19):18-20
用不同浓度的α-萘乙酸（NAA）200mg/L、400mg/L、600mg/L处理黄瓜种子12小时,以蒸馏水为对照,进行恒温催芽及幼苗培养,观察其对黄瓜种子萌发及幼苗生长的影响,结果表明：NAA处理对黄瓜种子的萌发与幼苗生长有明显的促进作用,发芽率、发芽势、壮苗指数和G值均比对照高,且随着处理浓度的增加各项指标呈现先上升后下降的趋势,其中400mg/L处理对黄瓜种子萌发及幼苗生长的促进作用最明显,为本实验筛选的最佳浓度. 相似文献
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为确定催芽机播小麦种子适宜的浸种条件,选用小麦品种偃展4110,将其种子在不同温度、不同时间下分别浸种,分析了种子吸水特性与种子回干后的活力。结果表明,在种子吸水率相当的条件下,采用较低的温度浸种,浸种液的电导率较低,即能够减少种子内含物渗出量,并且种子吸胀率较小。与其它浸种处理相比,30℃浸种6 h和40℃浸种4 h下小麦种子简化活力指数较高。30℃浸种6 h处理既保证了种子发芽率和活力,又相对适合机械化播种。 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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GUO Bao-feng Xiao Da-wei 《重庆大学学报(英文版)》2005,4(3):129-133
Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator＇s Garden. Translating building data to the Virtual Reality Modeling Language （VRML） is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching. 相似文献