›› 2019, Vol. 31 ›› Issue (4): 631-638.DOI: 10.3969/j.issn.1004-1524.2019.04.16

• Environmental Science • Previous Articles     Next Articles

Effects of bio-organic fertilizer on soil microbial population and enzymes activities under different continuous cropping years of protected cucumber

WANG Yanyun1,2, ZHAO Longjie1, HAO Chunli1, CAI Jinzhong1,2,*   

  1. 1. Department of Analytical Science and Technology, Xiamen Huaxia University, Xiamen 361024, China;
    2. Xiamen Environmental Monitoring Engineering Technology Research Center, Xiamen 361024, China
  • Received:2018-09-05 Online:2019-04-25 Published:2019-04-19

Abstract: In the present study, bio-organic fertilizer was made from trichoderma, abandoned north Chinese caterpillar fungus medium and gulomic acid residue after evaporation. The low (7.5 t·hm-2), medium (15 t·hm-2), high (30 t·hm-2) dosage bio-organic fertilizer was applied in non-continuous cropping soil and protected cucumber continuous soil of 3, 7, 11 years, respectively, and soil microbial population, enzymes activities and amelioration effect were determined. The results showed that the quantity of soil bacteria, actinomycetes, trichoderma, activities of soil invertase, phosphatase, urease, catalase, soil quality membership value, and the yield and contents of vitamin C and soluble sugar of cucumber were enhanced at first and then decreased with the increasing continuous cropping years under the same application rate of bio-organic fertilizers. However, the quantities of soil fungi and Fusarium oxysporum were increased with the increasing continuous cropping years. Under the same continuous cropping years, the quantity of soil microbes, activities of soil enzyme, yield and quality of cucumber were enhanced with the increasing application rate of bio-organic fertilizer. This bio-organic fertilizer could ameliorate ecological quality of continuous cropping soil, yield and quality of cucumber, and its amelioration effect on soils with was enhanced with higher application rate on soils with longer continuous cropping years.

Key words: continuous cropping obstacle, bio-organic fertilizer, soil microbe, soil enzyme, cucumber quality

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