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Soil Microbial Community Structure and Physicochemical Properties in Amomum tsaoko -based Agroforestry Systems in the Gaoligong Mountains, Southwest China

Author

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  • Guizhou Liu

    (CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla 666303, China)

  • Man Jin

    (CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla 666303, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Chuantao Cai

    (CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla 666303, China)

  • Chaonan Ma

    (CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla 666303, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Zhongsuzhi Chen

    (CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla 666303, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Lunlun Gao

    (CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla 666303, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

Abstract

Amomum tsaoko is cultivated in forests of tropical and subtropical regions of China, and the planting area is expanding gradually. However, little attention has been paid to the impact of A. tsaoko cultivation on the soil characteristics of the regions. We analyzed the effects of the A. tsaoko -forest agroforestry system (AFs) on the composition of soil microbial communities with increasing stand ages. We also compared the soil physicochemical properties, microbial biomass, and phospholipid fatty acid (PLFA) composition between native forest (NF) and AFs. The results showed that the level of total carbon, nitrogen, and organic matter dramatically dropped in AFs with increasing stand ages. pH affected other soil properties and showed close correlation to total carbon ( P = 0.0057), total nitrogen ( P = 0.0146), organic matter ( P = 0.0075), hydrolyzable nitrogen ( P = 0.0085), available phosphorus ( P < 0.0001), and available potassium ( P = 0.0031). PLFAs of bacteria ( F = 4.650, P = 0.037), gram-positive bacteria ( F = 6.640, P = 0.015), anaerobe ( F = 5.672, P = 0.022), and total PLFA ( F = 4.349, P = 0.043) were significantly affected by different treatments, with the greatest value for NF treatment, and least value for AF5. However, the microbial biomass declined during the initial 5 years of cultivation, but it reached the previous level after more than 10 years of cultivation. Our research suggests that AFs is a profitable land-use practice in the Gaoligong Mountains and that AFs showed a recovering trend of the soil nutrient condition with increasing stand ages. However, the severe loss of nitrogen in the soil of AFs requires additional nitrogen during cultivation to restore it to pre-cultivation levels.

Suggested Citation

  • Guizhou Liu & Man Jin & Chuantao Cai & Chaonan Ma & Zhongsuzhi Chen & Lunlun Gao, 2019. "Soil Microbial Community Structure and Physicochemical Properties in Amomum tsaoko -based Agroforestry Systems in the Gaoligong Mountains, Southwest China," Sustainability, MDPI, vol. 11(2), pages 1-14, January.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:2:p:546-:d:199497
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    References listed on IDEAS

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    1. Norman Myers & Russell A. Mittermeier & Cristina G. Mittermeier & Gustavo A. B. da Fonseca & Jennifer Kent, 2000. "Biodiversity hotspots for conservation priorities," Nature, Nature, vol. 403(6772), pages 853-858, February.
    2. Diana H. Wall & Uffe N. Nielsen & Johan Six, 2015. "Soil biodiversity and human health," Nature, Nature, vol. 528(7580), pages 69-76, December.
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    2. Godson Chinonyerem Asuoha & Uchenna Paulinus Okafor & Philip Ogbonnia Phil-Eze & Romanus Udegbunam Ayadiuno, 2019. "The Impact of Soil Erosion on Biodiversity Conservation in Isiala Ngwa North LGA, Southeastern Nigeria," Sustainability, MDPI, vol. 11(24), pages 1-17, December.

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