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不同磁场强度对刺槐硬枝扦插超声波育苗生根的影响

2015-12-03夏尚光侯金波

天津农业科学 2015年11期
关键词:磁场

夏尚光+侯金波

摘    要:以刺槐硬枝插穗为试材,设置了600,800,和1 000 Gs等3种磁场处理强度,研究其成活生根情况。结果表明: (1)与对照相比,各处理根系长增加2~4 cm,生根条数增加5~8根,叶片数增加8~12个,其中,以800 GS磁场苗床的处理效果最佳。(2)在相同磁场强度下,采用托玛琳石处理与未用托玛琳石处理相比,各处理的插穗新根生长速度均明显加快,根系长度平均增加约1 cm,发根量增加2~3根,总叶量2~3片。由此表明,磁场和托玛琳石都对剌槐硬枝扦插生根生长有明显的增速效果。

关键词: 磁场;速生剌槐;超声波育苗;硬枝扦插;生根率

中图分类号:S685.99         文献标识码:A         DOI 编码:10.3969/j.issn.1006-6500.2015.11.028

Effect on Rootage of Branchlets Ultrasonic Propagation for Robinia Pseudoacacia under Different Intensities of Magnetic Field

XIA Shang-guang1, HOU Jin-bo 2

(1. Academy of  Forestry, Hefei, Anhui 230031, China; 2. Anhui Hongsen Gaoke Ecological Development Company for Agriculture and Forest, Guoyang, Anhui 233602, China)

Abstract: This study takes branchlet cuttinGs of fast-growing Robinia  pseudoacacia var inermis Dc as testing material, sets three treatments of magnetic field of 600, 800 and 1 000 Gs, to compare the effects on rootage under different intensities of magnetic field. The results showed that root length of the treatments increased 2~4 cm longer, root number 5~8 more, leaf number 8 to 12 more, than those in control (not using seedbed of magnetic field, traditional ultrasonic seedling), the effect of treatment with seedbed of magnetic field under 800 Gs is best. Then the growth speed increased to some extent, of treatments with Tourmaline, the average root length 1 cm longer, the root number 2~3 root more, leaf number increased 2~3 more, compared with treatments untreated with Tourmaline in the same densities of magnetic field. It suggests that the magnetic field and Tourmaline both have promoting effect on the growth of Robiaia pseudoacacia var inermis Dc.

Key words: magnetic field; Robiaia pseudoacacia; ultrasonic seedling; rootage

生物磁学是研究和应用物质的磁性和磁场与生物学特性之间相互联系和相互影响的一门新兴边缘学科。随着科学技术发展的突飞猛进,生物磁学也得到了大力扩展和深化, 目前已在医学、农业、食品、环保以及生物工程等领域得到广泛应用[1]。电磁辐射对生物生长、发育、遗传与分化的影响已经成为人们研究的热点[2]。国内外许多研究证明,磁场直接处理植物种子,可明显提高种子的发芽势与发芽率,促进种子生根等。植物种子受磁场照射可促进发芽,刺激生根和胚轴延长,细胞分裂指数增加[3] ,提高根系活力,为植物体内许多重要物质的生物合成提供更多的中间产物[4]。番茄种子在磁场处理下活力明显提高[5]。但磁场处理是否能促进木本树种穗条生根生长其研究鲜见报道,特别是对刺槐硬枝扦插。

速生剌槐(Robiaia pseudoacacia var.)是……

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