›› 2017, Vol. 29 ›› Issue (5): 760-766.DOI: 10.3969/j.issn.1004-1524.2017.05.11

• Horticultural Science • Previous Articles     Next Articles

Effects of exogenous fatty acids on growth and rhizosphere soil of pepper plants

ZHANG Fujian, CHEN Yu, WU Chaoqun, XIAO Chen, WU Caijun*, YANG Youxin*   

  1. College of Agronomy, Jiangxi Agricultural University, Nanchang 330045, China
  • Received:2016-12-30 Online:2017-05-20 Published:2017-06-06

Abstract: To investigate the effects of palmitic acid and oleic acid on the pepper plant growth, the rhizosphere soil microorganism and enzyme activities, pot experiments were performed to investigate the exogenous fatty acids function on the growth of pepper plants and soil environment, including three treatments (palmitic acid, oleic acid and control without any fatty acid added to the soil). The results showed that palmitic acid and oleic acid added to soil could promote growth and development of pepper plants, and improve rhizosphere soil microorganism. The palmitic acid treatment significantly promoted the growth of pepper plants, including plant height, stem diameter, biomass, and photosynthesis compared with the control. At the same time, the palmitic acid and oleic acid treatment increased the rhizosphere actinomycetes and bacteria, reduced the number of fungi, accompanying with increasing of polyphenol oxidase, urease and invertase activity. The two treatments increased pH value and decreased electrical conductivity of the rhizosphere soil. Therefore, soil added with palmitic acid and oleic acid promoted pepper growth and improved its soil environment.

Key words: pepper, palmitic acid, oleic acid, growth, microbial quantity, soil enzyme

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