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1.
本文主要介绍了瓜叶菊的播种、移栽、浇水与施肥及病虫害防治的相关技术与方法,并对不同栽植期与瓜叶菊的开花关系进行了阐述,为人为控制瓜叶菊花期提供了新方法,对瓜叶菊盆花生产具有一定的指导作用。 相似文献
2.
柠檬酸钾对小麦种子萌发及幼苗生长的影响 总被引：4，自引：0，他引：4
研究了不同浓度柠檬酸钾浸种处理小麦种子,对种子萌发及幼苗生理生化的影响。结果表明,柠檬酸钾能提高小麦种子的发芽率,促进小麦幼苗株高和根长的生长,柠檬酸钾还能提高小麦叶片中总叶绿素、可溶性蛋白质和可溶性糖的含量,增强种子中α-淀粉酶、β-淀粉酶以及叶片中硝酸还原酶的活性。且以20mg／mL左右为最佳浓度范围。 相似文献
3.
多效唑对大豆品质的影响 总被引：3，自引：0，他引：3
为了验证多效唑对大豆品质的影响,我们对生长的大豆通过土施或喷施的办法施以不同浓度或剂量的多效唑,然后再通过生物化学的方法对大豆种子中主要营养物质的含量进行测定,通过与对照组的比较,发现施用多效唑以后,大豆种子中蛋白质、糖、脂肪的含量发生明显变化,从而证明多效唑对大豆的品质有显著的影响 相似文献
4.
多效唑(PP333)浸种对小麦生长发育的影响 总被引：2，自引：0，他引：2
吴迪 《四川职业技术学院学报》2010,20(1):118-119
以小麦品种川育20为材料,研究了不同浓度0（CK）、50、100、200mg／L的多效唑溶液浸种对小麦种子萌发过程中呼吸速率的变化以及采用水培成幼苗后,对其形态指标和生理指标的测定。结果表明：经多效唑溶液浸种处理后,小麦种子在萌发过程中,呼吸速率有所变化,同时,小麦幼苗株高明显受到抑制;地上、地下部分干物质积累增加;根冠比、叶绿素含量增加;根系活力加强,抗性增强。说明多效唑溶液浸种有助于小麦壮苗、增强植物抗逆性,有利于小麦的生产,以100mg／L多效唑浸种效果最为明显。 相似文献
5.
在瓜叶菊种子发芽出苗后,用4种不同配方的营养液进行根外施肥,以汉普营养液作为对照.4种配方与对照所培育出的种苗有极显著差异,配方3所培育出的种苗长势最好,抗性最强. 相似文献
6.
本文研究了盐胁迫下不同浓度水杨酸(SA)对小麦种子萌发及幼苗生长的影响。结果表明:5 mmol/LNaCl胁迫下,小麦种子发芽率降低,根伸长、芽伸长受到抑制;小麦幼苗叶绿素含量、超氧化物歧化酶(SOD)活性降低,膜脂过氧化作用产物丙二醛(MDA)积累;0.1-1mmol/LSA处理提高了盐胁迫下小麦种子发芽率,促进小麦幼苗生长,提高小麦幼苗叶绿素含量、超氧化物歧化酶的活性,抑制MDA积累,缓解盐胁迫对小麦幼苗的伤害,并表现出浓度效应。 相似文献
7.
人工老化对甜玉米种子活力及抗氧化指标变化分析 总被引：1，自引：0，他引：1
以甜玉米种子为试验材料,研究了人工老化时间对种子活力及抗氧化指标的影响。结果表明,随着老化时间的延长,不同甜玉米种子的发芽势、发芽率都逐渐降低,在种子老化6d后,种子发芽率降低了46%~50%;而种子发芽指数、活力指数变化趋势则因品种而异;在甜玉米种子成熟老化过程中,VE含量先升高再降低,甜玉米种子中的SOD、POD、CAT酶活性均逐渐升高,并且随着老化程度的加剧,不同甜玉米种子中的SOD、CAT酶活性差异不明显,而POD酶活性则和种子发芽率呈负相关。 相似文献
8.
研究证明麦套花生在喷施100μg/gP333(多效唑)的化控条件下,适宜的栽培密度是12000穴/667m2～13000穴/667m2.产量可达350～375kg/667m2.在花生花期后喷施多效唑能显著地提高产量. 相似文献
9.
成熟的苦瓜种子含水量较高，对脱水的反应既有别于正常性种子，又不同于顽拗性种子．室温下应用不同的方法脱水，虽然脱水速度不同，但都有利于苦瓜种于萌发．当含水量在6％以上时．随含水量降低，种子发芽率，发芽势和活力指数显著提高；超氧物歧化酶（SOD）的活性略有降低，脂氧合酶（LOX）的活性和丙二醛（MDA）含量缓慢上升．当含水量低于6％时，种子发芽率和活力指数下降．SOD活性迅速降低，LOX活性和MDA含量明显增加．温度较高的日晒脱水可显著降低苦瓜种子的发芽率和活力指数．使种子很快死亡；并显著降低SOD和LOX的活性．MDA含量增加明显．室温脱水和6％～9％的含水量有利于苦瓜种子的萌发和活力保持． 相似文献
10.
选用花生种子为试材,研究不同浓度的硒对花生苗期生长及脂肪酶活力的影响.结果表明:在硒浓度为0.5 mg.L-1时,硒对花生种子发芽率和发芽势有较好的促进作用;硒浓度为1.0 mg.L-1时,MDA含量较低,叶绿素含量较高;硒浓度为3.0 mg.L-1时,脂肪酶活力较高,有利于花生的生长发育;硒浓度为5.0 mg.L-1时,对花生根长和POD活性有较好的促进作用.综合分析,低浓度硒能提高花生种子的发芽率,增加发芽势和根长,对花生苗期生长有促进作用,但高浓度(6.0 mg.L-1)时对花生种子的萌发和幼苗生长则有明显的抑制作用. 相似文献
11.
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
12.
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
13.
铬对辣椒种子萌发的影响 总被引：2，自引：0，他引：2
文章探讨不同浓度的铬（Cr^6＋）对辣椒（Capsicum frutecens L．）种子萌发的影响，实验结果表明，当Cr^6＋浓度为5mg／L和10mg／L时，Cr^6＋对辣椒种子萌发率的影响不大．而高浓度的Cr^6＋不利于辣椒萌发和生长．Cr^6＋对辣椒幼根生长的抑制作用大于对芽生长的抑制作用． 相似文献
14.
用麦宝种衣剂对小麦种子进行包衣处理,测定种子发芽期间及苗期的各项活力指标及几个生理指标。结果表明：麦宝种衣剂处理对小麦种子发芽率、发芽势、发芽指数、活力指数和苗长、单株鲜重及苗期形态指标的影响与对照相比有所降低;麦宝种衣剂处理对TTC根系活力、过氧化物酶的影响与对照相比有所下降,但叶绿素含量与对照相比有所提高。 相似文献
15.
采用不同浓度的两种酚酸类物质及其混合物对大巢菜种子及幼苗进行处理,测定其对大巢菜发芽率、营养生长及其某些生理指标的影响。结果表明,酚酸类物质及其混合物可以显著延缓大巢菜种子发芽所需要的时间,降低最终的萌发率;对大巢菜幼苗的根长度、苗高度及干物质积累有一定的抑制作用;同时,根系活力与叶绿素含量也有不同程度的下降。 相似文献
16.
在室内条件下,初步探究了温度对蜡梅种子萌发的影响.结果表明:(1)蜡梅种子千粒重为212.094±4.168 g.种壳限制蜡梅种子吸水进程,有种壳,浸种96 h,吸水率不足8%,去除种壳,10 h内,吸水率达80.2%.(2)四个温度处理下,萌发率(%)大小为:25℃(78.33)>15℃(77.5)>30℃(55)>4℃(0),4℃下,萌发率为0,15℃种子基本能正常萌发,但萌发活力指数下降,25℃下,种子萌发率,发芽势,活力指数最高,萌发速率最快,30℃下,萌发率显著下降.(3)根TTC还原活力(mg/g/h)比较:25℃(0.5348)>15℃(0.4361)>30℃(0.3318),温度对幼苗鲜、干重、含水量无显著影响,对胚根长度影响显著.可见,种壳限制蜡梅种子吸水,进而影响其萌发.低温限制蜡梅种子萌发,在一定范围内,降温对蜡梅萌发影响不大,高温则延迟萌发,且降低蜡梅种子萌发速度和质量,蜡梅萌发适合的温度在25℃左右. 相似文献
17.
当稀土微肥浓度在400mg·L－1左右时,发芽率、发芽指数和活力指数分别比对照增加14．63％,27.94％和64．43％;浸种后培养48h,根长平均比对照增加1．5cm。 相似文献
18.
Wang ZF Wang JF Bao YM Wang FH Zhang HS 《Journal of Zhejiang University. Science. B》2010,11(12):958-964
Seed vigor is an important characteristic of seed quality, and rice cultivars with strong seed vigor are desirable in direct-sowing
rice production for optimum stand establishment. In the present study, the quantitative trait loci (QTLs) of three traits
for rice seed vigor during the germination stage, including germination rate, final germination percentage, and germination
index, were investigated using one recombinant inbred line (RIL) population derived from a cross between japonica Daguandao and indica IR28, and using the multiple interval mapping (MIM) approach. The results show that indica rice presented stronger seed vigor during the germination stage than japonica rice. A total of ten QTLs, and at least five novel alleles, were detected to control rice seed vigor, and the amount of variation
(R
2) explained by an individual QTL ranged from 7.5% to 68.5%, with three major QTLs with R
2>20%. Most of the QTLs detected here are likely to coincide with QTLs for seed weight, seed size, or seed dormancy, suggesting
that the rice seed vigor might be correlated with seed weight, seed size, and seed dormancy. At least five QTLs are novel
alleles with no previous reports of seed vigor genes in rice, and those major or minor QTLs could be used to significantly
improve the seed vigor by marker-assisted selection (MAS) in rice. 相似文献
19.
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
20.
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