磁化处理对绒毛白蜡嫩枝扦插生根的影响

Magnetic treatment on rootings of semi lignified twigs of Fraxinus velutina

以绒毛白蜡‘鲁蜡5号’Fraxinus velutina‘Lula-5’无性系3年生母树的当年生半木质化枝条为试材,采用完全随机区组试验设计,研究了磁化水喷淋(MW)+磁化毯(MR),磁化水喷淋(MW)及非磁化水喷淋(ck)等3个处理对绒毛白蜡生根率、生物量积累、根系营养物质含量的影响。结果表明:(1)MW+MR处理有利于促进插条生根,插穗生根率和根系效果指数均极显著高于MW处理及ck(P<0.01);新梢平均基径和平均长度均显著高于MW处理及ck(P<0.05)。(2)磁化处理对扦插苗细根形态有显著影响,其中MW+MR处理和MW处理的细根长度、直径、表面积和体积显著高于ck(P<0.05)。(3)MW+MR及MW处理氮、磷、钾、钙、镁、铁、锰、锌、铜、可溶性糖质量分数均高于ck,钠质量分数则低于ck,差异极显著(P<0.01)。因此,磁化处理有利于提高绒毛白蜡嫩枝扦插生根率,根系生长发育、生物量积累和营养物质的积累得到进一步提高。

This research explored the effec t of magnets on the rooting of cutting slips,young seedling growth and biomass accumulation,and nourishing matter content in roots.Using a current year,sprouting branchlet from a cloned 3-year-old female Fraxinus velutina ＇Lula-5＇ tree as cuttage material and three treatments of magnetized water spray（MW）,[magnetized water spray（MW） ＋ magnetization blanket（MR）],and nonmagnetized water spray（NMW）（the control） an experiment was carried out with a randomized complete block design trial.Results showed that：（1） the cuttage segment rootage ratio and the root effective index for（MW ＋MR） were greater and highly significant（P〈0.01） compared to the MW and NMW treatments（control）.The average diameter and length growth of young sprouting shoots in the（MW ＋ MR） treatment were also significantly higher than MW and NMW treatments（P〈0.05）.（2） The fine root length,diameter,surface area,and volume showed no difference for the three treatments;whereas,all root morphology indexes in（MW ＋ MR）and MW treatments were significantly higher than the NMW treatment（P〈0.05）.（3） Compared to the control,nutrient content of N,P,K,Ca,Mg,Fe,Mn,Zn,Cu,and soluble sugar in the other two treatments was greater and highly significant（P〈0.01）,but Na was lower and highly significant（P〈0.01）.In conclusion,magnetization was beneficial for enhancement of the rooting rate,for promoting root growth as well as for biomass and nutrient accumulation.