• ISSN 1008-505X
  • CN 11-3996/S
ZHAO Qing-yun, ZHAO Qiu-fang, WANG Hui, WANG Hua, ZHUANG Hui-fa, ZHU Zi-hui. Beneficial effects of plant growth promoter rhizobacteria on vanilla (Vanilla planifolia Ames.) growth[J]. Journal of Plant Nutrition and Fertilizers, 2015, 21(2): 535-540. DOI: 10.11674/zwyf.2015.0230
Citation: ZHAO Qing-yun, ZHAO Qiu-fang, WANG Hui, WANG Hua, ZHUANG Hui-fa, ZHU Zi-hui. Beneficial effects of plant growth promoter rhizobacteria on vanilla (Vanilla planifolia Ames.) growth[J]. Journal of Plant Nutrition and Fertilizers, 2015, 21(2): 535-540. DOI: 10.11674/zwyf.2015.0230

Beneficial effects of plant growth promoter rhizobacteria on vanilla (Vanilla planifolia Ames.) growth

  • 【Objectives】 Vanilla (Vanilla planifolia Ames.) is one of tropical perennial crop. The elongation of growth period often leads to weak plant, reduced population of soil beneficial microbes, increased harmful microbes and unbalance of the soil microbial community structure. We hope this can provide theoretical basis for solving the problems of weak vanilla plant growth and continuous cropping biological obstacles. The main objectives of this study were to study the effect of one of recognized root growth promoter, rhizobacteria Bacillus subtilis Y-IVI on ameliorate soil microbial community structure and the proper way of its application. 【Methods】 A solid fermented bioorganic fertilizer (BIO) was prepared by inoculating Bacillus subtilis Y-IVI into cattle manure and fermented 5 days inside greenhouse, the final active Y-IVI content is 3 × 108 cfu/g. A pot experiment in green house was carried out with chemical fertilizer as control, the effects of application of Y-IVI inocula, biofertilizer and cattle manure on the plant growth of both aboveground part and root were investigated Selective mediums method was used to study the colonization ability of Y-IVI in vanilla rhizosphere soil and their influence on the pathogen number of rhizome rot disease (Fusarium oxysporum). 【Results】 The application of BIO could obviously increase vanilla plant above ground and root dry weight by 63.1% and 59.4% compared with control, and significantly increased the plant above ground dry weight by 43.2% compared with cattle manure. The single application of Y-IVI binocular does not have the significant effect on plant above ground and root dry weight. The application of BIO significantly increases the average root diameter, root surface area and total root volume by 41.9%, 88.9% and 80.4%, compared with control, but not the total root length; root surface area and total root volume of BIO treatment were obviously increased by 41.9% and 30.8% compared with manure, respectively, while average root diameter merely increased by 10.1%; average root diameter of Y-IVI treatment was significantly increased by 25.5% compared with control, but root surface area and total root volume had no significant difference. Application of BIO and Y-IVI significantly decreased population of Fusarium oxysporum in rhizosphere soil by 52.2% and 41.8%, compared with control, respectively, and organic fertilizer treatment merely decreased by 10%; population of Y-IVI remained about 106 cfu/g rhizosphere soil after application of BIO and Y-IVI 4 mouths. No Y-IVI was detected in organic fertilizer treatment and control. 【Conclusions】 Inoculation of Y-IVI solid fermented bio-organic fertilizer BIO could promote vanilla plant above ground and root growth, significantly decrease F. oxysporum number in rhizosphere soil; Y-IVI can successfully colonize in rhizosphere soil to have sound effects on vanilla growth. The BIO can apply to vanilla culture to reduce chemical fertilizer and organic fertilizer application, the number of F. oxysporum, and decrease continuous cropping obstacles.
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