芽孢杆菌与植物生长调节剂在苔藓结皮种源扩繁中的作用
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S157.9;S154;S184

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国家重点研发项目课题“边坡工程安全防控与生态还绿技术”(2017YFC0504703);国家重点研发国际合作项目“人工促进生物土壤结皮快速固沙技术”(2016YFE0203400-05);杨凌示范区产学研用协同创新重大项目“生物结皮的种源扩繁与生态综合护坡技术产业化(2017CXY-08)”(2017CXY-08);中央高校优秀青年科研业务专项基金项目“人工培育苔藓结皮的关键影响因子”(2014YQ006)


Effects of Bacillus and a Plant Growth Regulator for Provenance Propagation of Moss Biocrusts
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    摘要:

    [目的] 研究芽孢杆菌与植物生长调节剂对苔藓结皮生长发育的影响,为提高苔藓结皮种源扩繁效率提供科学依据。[方法] 选择芽孢杆菌(胶质芽孢杆菌/巨大芽孢杆菌)与生长调节剂(噻苯隆)2种因素,设计双因素完全试验,观测温室条件下苔藓结皮的覆盖度、株高度和株密度。[结果] ①只添加胶质芽孢杆菌处理的苔藓生长状况最优,相比对照组(未添加芽孢杆菌及生长调节剂)分别提高了苔藓覆盖度(+18.9%)、株高度(+0.85 mm)和株密度(+15.44株/cm2);②添加巨大芽孢杆菌能提高苔藓株密度(+5.76株/cm2),但会减小其株高度(-0.78 mm),对盖度则无显著影响;③生长调节剂TDZ减小了苔藓植物覆盖度(-11.78%)、株高度(-3.33 mm),对株密度影响不显著;④芽孢杆菌与生长调节剂存在交互作用,巨大芽孢杆菌+TDZ处理增大了苔藓株密度(+9.79株/cm2),且高于只添加巨大芽孢杆菌处理(+3.67株/cm2),胶质芽孢杆菌+TDZ处理增加苔藓株密度(+4.3株/cm2)但弱化了胶质芽孢杆菌的促进作用(-11.14株/cm2)。[结论] 功能性微生物与生长调节剂对苔藓结皮生长发育具有显著影响,在今后苔藓结皮种源扩繁实践中应加以考虑和借鉴。

    Abstract:

    [Objective] The effects of Bacillus and a plant growth regulator on the growth and development of moss biocrusts were studied in order to provide a scientific basis for improving the provenance propagation efficiency of moss biocrusts.[Methods] A two-factor complete experiment was designed to observe the coverage, height, and density of moss biocrusts under greenhouse conditions by selecting Bacillus(B. mucilaginosus/B. megaterium) and growth regulator (Thidiazuron, TDZ) as the two variables.[Results] ① The growth status was optimal after the addition of B. mucilaginosus, which increased the coverage (+18.9%), height (+0.85 mm), and density (+15.44 strains/cm) compared to the control group (no Bacillus and growth regulator). ② After the addition of B. megaterium, the density of moss biocrusts increased (+5.76 strains/cm2); however, the height decreased (-0.78 mm) and the coverage was not significantly changed. ③ Treatment with TDZ reduced the coverage (-11.78%) and height (-3.33 mm); however, it had no significant effect on the density of moss biocrusts. ④ The growth status of BSC was significantly affected by the interaction of Bacillus and TDZ. The combination treatment of B. megaterium and TDZ increased the density of moss biocrusts (+9.79 strains/cm2) and was higher than that of the treatment where only B. megaterium was added (+3.67 strains/cm2). Additionally, the combined treatment of B. mucilaginosus and TDZ increased the density of moss biocrusts (+4.3 strains/cm2); however, it weakened the positive effect of B. mucilaginosus (-11.14 strains/cm2).[Conclusion] The effects of functional microorganisms and a growth regulator on the growth and development of moss biocrusts are very significant, which should be considered during the practice of provenance propagation of moss biocrusts.

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王清玄,鞠孟辰,卜崇峰.芽孢杆菌与植物生长调节剂在苔藓结皮种源扩繁中的作用[J].水土保持通报,2019,39(5):166-171

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  • 收稿日期:2019-05-30
  • 最后修改日期:2019-06-09
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  • 在线发布日期: 2019-11-16
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