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Chinese Journal of Applied Ecology ›› 2016, Vol. 27 ›› Issue (4): 1189-1195.doi: 10.13287/j.1001-9332.201604.039

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Effects of two phenolic acids on root zone soil nutrients, soil enzyme activities and pod yield of peanut

LI Qing-kai1,2, LIU Ping2, TANG Zhao-hui3, ZHAO Hai-jun4, WANG Jiang-tao2, SONG Xiao-zong2, YANG Li2, WAN Shu-bo4*   

  1. 1College of Agronomy and Plant Protection, Qingdao Agricultural University, Qingdao 266109, Shandong, China;
    2Institute of Agricultural Resources and Environment, Shandong Academy of Agricultural Sciences, Ji’nan 250100, China;
    3Shandong Luyan Agricultural Seed Co. Ltd., Ji’nan 250100, China;
    4Shandong Academy of Agricultural Sciences, Ji’nan 250100, China
  • Received:2015-09-23 Revised:2016-02-04 Online:2016-04-22 Published:2016-04-22
  • Supported by:
    This work was supported by the Natural Science Foundation of Shandong Pro-vince (ZR2014YL025), the Supporting Plan of National Science and Technology of China (2014BAD11B04), the Earmarked Fund for Modern Agro-industry Technology Research System (CARS-14) and Shandong Provincial Key Laboratory of Crops Genetic Improvement,Ecology and Physiology (ZDSYS2014).2015-09-23 Received, 2016-02-04 Accepted.*

Abstract: In order to investigate the relationship between the accumulation of phenolic acids in peanut continuous cropping soil and the continuous cropping obstacle of peanut, the effects of p-hydroxy benzoic acid and cinnamic acid on peanut root zone soil nutrients, soil enzyme activities and yield of peanut were studied by pot experiment at three stages of peanut, i.e. the pegging stage of peanut (45 days after seedling), the early podding (75 days after seedling) and the end of podding (105 days after seedling) stages. The results showed that the peanut root zone soil nutrients and enzyme activities changed obviously under the two phenolic acids treatment, especially at the pegging stage of peanut. The soil alkali-hydrolyzable nitrogen, available phosphorus, available potassium, and soil enzyme activities (urease, sucrose, neutral phosphatase) were decreased significantly. At the early and end of podding stages of peanut, the effects of the two phenolic acids on peanut root zone soil nutrients and soil enzyme activities were under a weakening trend. The allelopathy of cinnamic acid was stronger than that of p-hydroxy benzoic acid at the same initial content. The pod yield per pot was reduced by 45.9% and 52.8%, while the pod number of per plant was reduced by 46.2% and 48.9% at higher concentration (80 mg·kg-1 dry soil) of p-hydroxy benzoic acid and cinnamic acid treatments, respectively.