共查询到20条相似文献，搜索用时 125 毫秒
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丹参繁殖方法的对比试验研究 总被引：3，自引：1，他引：3
对丹参种子、分根、根茎和扦插几种繁殖方法进行栽培试验，对生长量、产量进行对比，结果表明，以上四种繁殖方法，以采用根茎作繁殖材料，生长量明显，产量最高。其次是分根繁殖和种子繁殖，扦插繁殖最差。 相似文献
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大田扦插繁殖东北红豆杉幼苗,最扩大繁殖东北红豆杉资源的最佳途径。经三年的田间实验,现已全部掌握了东北红豆杉的大田扦插繁殖技术,有的枝条在扦插当年即可获得成熟种子。 相似文献
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植物的繁殖方式大多数是由种子进行的,但有些植物的营养器官也能繁殖新个体,植物依靠营养器官所进行的繁殖,叫做营养繁殖。扦插是营养繁殖方法的一种(另外还有压条、嫁接),植树造林,繁殖优良果木,加速培育绚丽多姿的花卉,常常采用扦插法繁殖(图1),而农作物如甘薯、番茄等,也常用扦插方法种植。这样的营养繁殖,有利于保持植物优良性状加快繁殖速度。怎样进行扦插呢?你可做下面的实验来探究。实验材料,用品的准备1!准备插床:一花盆(或其他容器)在底部排水孔处,垫上小石块,然后在底部放置中粒颗粒土(沙壤土)利于排水。然后,按小粒的沙壤土6成与… 相似文献
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组织培养是荆门野生百合快速繁殖的重要方法。实验证实,该组织培养的最佳外植体是外层鳞片的基部组织,初生诱导芽的适宜培养基为MS BA1.0 mg/L NAA0.1 mg/L,增殖培养基的适宜配方为MS BA0.5 mg/L NAA0.1 mg/L,生根培养基的适宜配方为1/2MS BA0.05 mg/L NAA0.05 mg/L 活性炭3 g/L、2/1MS BA0.05 mg/L NAA0.1 mg/L 活性炭3 g/L,试管苗移栽适宜土壤基质为腐殖土与沙壤土1:1的混合土。同时经与百合种子繁殖、鳞片扦插繁殖相比较,扦插繁殖的单产和总产接近于组织培养繁殖。建议建立组织培养基技术与鳞片扦插技术相结合的规模化生产种植模式,并提供了相应的技术参数体系。 相似文献
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宋微 《中国校外教育(理论)》2010,(1)
矮牵牛在生产中常采用播种繁殖,但是种子大都是从国外进口的,价格昂贵,为了更快的获得大量种苗,本实验对矮牵牛进行了快速繁殖方法的实验,主要采用扦插繁殖.在实验过程中,分别在7种不同的基质中各插150株矮牵牛的插穗,在整个实验过程中给予相同的温度和湿度,20天左右,测一下每种基质中生根数、生根率及平均根长. 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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Dong-dong Cao Jin Hu Xin-xian Huang Xian-ju Wang Ya-jing Guan Zhou-fei Wang 《Journal of Zhejiang University. Science. B》2008,9(12):964-968
The changes of kernel nutritive components and seed vigor in F1 seeds of sh
2 sweet corn during seed development stage were investigated and the relationships between them were analyzed by time series
regression (TSR) analysis. The results show that total soluble sugar and reducing sugar contents gradually declined, while
starch and soluble protein contents increased throughout the seed development stages. Germination percentage, energy of germination,
germination index and vigor index gradually increased along with seed development and reached the highest levels at 38 d after
pollination (DAP). The TSR showed that, during 14 to 42 DAP, total soluble sugar content was independent of the vigor parameters
determined in present experiment, while the reducing sugar content had a significant effect on seed vigor. TSR equations between
seed reducing sugar and seed vigor were also developed. There were negative correlations between the seed reducing sugar content
and the germination percentage, energy of germination, germination index and vigor index, respectively. It is suggested that
the seed germination, energy of germination, germination index and vigor index could be predicted by the content of reducing
sugar in sweet corn seeds during seed development stages.
Project supported by the National Natural Science Foundation of China (No. 30370911) and Education Department of Zhejiang
Province, China (No. 20070147) 相似文献
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Dong-dong CAO Jin HU Xin-xian HUANG Xian-ju WANG Ya-jing GUAN Zhou-fei WANG 《Journal of Zhejiang University. Science. B》2008,9(12)
The changes of kernel nutritive components and seed vigor in F1 seeds of sh2 sweet corn during seed development stage were investigated and the relationships between them were analyzed by time series regression (TSR) analysis. The results show that total soluble sugar and reducing sugar contents gradually declined, while starch and soluble protein contents increased throughout the seed development stages. Germination percentage, energy of germination, germination index and vigor index gradually increased along with seed development and reached the highest levels at 38 d aider pollination (DAP). The TSR showed that, during 14 to 42 DAP, total soluble sugar content was independent of the vigor parameters determined in present experiment, while the reducing sugar content had a significant effect on seed vigor. TSR equations between seed reducing sugar and seed vigor were also developed. There were negative correlations between the seed reducing sugar content and the germination percentage, energy of germination, germination index and vigor index, respectively. It is suggested that the seed germination, energy of germination, germination index and vigor index could be predicted by the content of reducing sugar in sweet corn seeds during seed development stages. 相似文献
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以黄瓜为试材,研究了种子在含不同浓度亚精胺的MS培养基上的萌发情况,然后将处理后的七龄幼苗去3／4下胚后转接到不含亚精胺的MS培养基中,统计再生植株的株高、节间平均长度、叶面积、雌株（长有雌花再生植株）比率、雌花总数．结果表明,较低浓度的亚精胺显著促进黄瓜种子的萌发且有利于再生植株生殖生长,显著提高雌花成花率;而较高浓的亚精胺则对种子的萌发表现出明显的抑制作用,也不利于再生植株叶片生长和花芽分化,但促进节间伸长． 相似文献
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Kaya M Kaya G Kaya MD Atak M Saglam S Khawar KM Ciftci CY 《Journal of Zhejiang University. Science. B》2008,9(5):371-377
Chickpea is an important food legume crop of Turkey and is largely grown for human consumption on low moisture or salt-affected soils.The objective of the study was to find the effects of NaCl stress at electrical conductivities of 4.5,8.6,12.7 and 16.3 dS/m and seed sizes (7,8 and 9 mm) on germination and early seedling growth of three popular chickpea cultivars (AKN-97,Gokce and Uzunlu-99).Mean frequency of germination,germination time,germination index,root length,shoot length and seedling fresh weight showed seed size-dependent responses of cultivars to salt stress.In general,small seeds germinated and grew more rapidly compared to medium and large seeds of the same cultivars against all levels of salt stress,with the best results in cultivar Uzunlu-99.No effect of NaCl treatments was observed on frequency of germination; however,a drastic decrease in early seedling growth was recorded at increased NaCl concentrations.Regression analysis results showed a significantly positive rela-tionship (P<0.01) between seed size and mean germination time,whereas a significantly negative relationship was recorded between seed size and germination index,root length,shoot length.Moreover,linear regression values apparently confirmed that increased seed size in each cultivar affected decreased germination index,root and shoot lengths with enhanced mean germination time.Thus,it was concluded that the use of small seeds could considerably reduce the production costs of chickpea in salt-affected soils. 相似文献
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凤仙花种子萌发特性的研究 总被引：2，自引：0，他引：2
通过比较分析凤仙花种子经不同的处理后的萌发率、发芽势、平均萌发时间和萌发指数,发现Prech ill处理、0.2%KNO3处理对种子的萌发有显著影响,对发芽势和萌发指数均有较大的提高:0.2%KNO3和Prech ill同时处理对凤仙花种子萌发影响最大,效果最好;光照处理对种子萌发没有明显的影响。 相似文献
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通过研究成熟度、GA3、覆土厚度、温度和基质等条件对百香果种子萌发的影响,探讨其萌发特性。结果表明,生理成熟期的百香果种子发芽率最高;生理成熟期和近商品成熟期的种子先浸泡GA3溶液再播种会降低发芽率,而商品成熟期的种子经GA3溶液处理后可提高发芽率:覆土厚度控制在2.0 cm左右时发芽率和种苗成活率最高,发芽畸形率最低:种子在40℃环境下发芽率最高、发芽速度最快;基质以白水苔泥炭:珍珠岩为4:1的配制最适宜百香果种子发芽,可得到较高的发芽率和最低的发芽畸形率。研究结果为百香果高效高产栽培提供了科学依据和技术支持. 相似文献
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研究了不同浓度的钠盐（Na2SO4和Na2CO3）胁迫对红麻种子萌发和幼苗生长的影响.结果表明：不同浓度盐胁迫对红麻种子的发芽指标和活力指数均有一定抑制作用,随浓度的增加抑制作用越强.浓度10~50 mmol/L的Na2SO4胁迫下,红麻种子的发芽势、发芽指数与对照没有显著差异,但活力指数显著低于对照,而当Na2SO4浓度为100 mmol/L时种子的发芽势、发芽指数与对照存在显著差异,Na2SO4浓度为200 mmol/L时种子不能萌发;Na2CO3浓度≥50 mmol/L时,红麻种子不能萌发.相同浓度下,Na2CO3比Na2SO4对红麻种子萌发的抑制作用更明显. 相似文献
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低温胁迫下镧对水稻种子萌发的影响 总被引：3，自引：0，他引：3
以水稻(Oryza sativa)种子为实验材料,研究了不同浓度稀土元素镧浸种对水稻种子低温萌发的影响。结果表明:15℃低温胁迫抑制水稻种子的萌发,浸种期用硝酸镧处理能够提高种子的抗逆性。低浓度((50~250)×10-6mol/L)硝酸镧浸种能提高水稻种子发芽率、发芽势、呼吸速率和过氧化氢酶活性,提高种子抗寒能力,实验发现用硝酸镧处理种子萌发以250×10-6mol/L浓度为最佳,低温胁迫下,发芽率提高9.67%,呼吸速率提高56.25%,过氧化氢酶活性提高1.73%。350×10-6mol/L以上高浓度对水稻种子的萌发无明显影响。 相似文献