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Effects of Different Weeding Methods on the Biomass of Vegetation and Soil Evaporation in Eucalyptus Plantations

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  • Yusong Deng

    (Forestry College of Guangxi University, No. 100 Daxue Road, Nanning 530004, China
    Guangxi Key Laboratory of Forest Ecology and Conservation, No. 100 Daxue Road, Nanning 530004, China)

  • Gairen Yang

    (Forestry College of Guangxi University, No. 100 Daxue Road, Nanning 530004, China
    Guangxi Key Laboratory of Forest Ecology and Conservation, No. 100 Daxue Road, Nanning 530004, China)

  • Zhifeng Xie

    (Forestry College of Guangxi University, No. 100 Daxue Road, Nanning 530004, China)

  • Jingrui Yu

    (Forestry College of Guangxi University, No. 100 Daxue Road, Nanning 530004, China)

  • Daihua Jiang

    (Agricultural College of Guangxi University, No. 100 Daxue Road, Nanning 530004, China)

  • Zhigang Huang

    (Agricultural College of Guangxi University, No. 100 Daxue Road, Nanning 530004, China
    Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences (CAAS), Haidian District, Beijing 100081, China)

Abstract

Eucalyptus is a fast-growing, short-cycle, and high-efficiency tree species that is widely planted all over the world. Weeding is a special practice for Eucalyptus plantations that aims to cultivate seedlings and reduce vegetation competition for nutrients. In this study, a typical Eucalyptus plantation was selected as the research object, and the effects of two different weeding methods on soil evaporation and plant growth were studied. The results showed that mechanical weeding could effectively remove harmful weeds at an early stage, but after 30 days of weeding, all kinds of plants gradually recovered; herbicide weeding required long-term maintenance. The herbicide had the best control effect on Microstegium vagans (Nees ex Steud.) A. Camus, Dicranopteris dichotoma (Thunb.) Bernh, and Blechnum orientale, but the effect on shrubs was not obvious. The evaporation rate of soil increased rapidly within five days after mechanical weeding. After 139–200 days of weeding, the differences in evaporation between non-weeding, herbicide weeding, and mechanical weeding was decreased. The average daily evaporation was 0.52, 0.48, and 051 mm/d under these three practices. Meanwhile, weeding could promote Eucalyptus growth. Our results showed that weeding could significantly increase the height, diameter at breast height, and volume of Eucalyptus. One month after herbicide weeding or mechanical weeding (July), the height, DBH, and volume of Eucalyptus were significantly greater than those under non-weeding, but there was no significant difference between herbicide weeding and mechanical weeding. In addition, according to the different initial moisture contents, the evaporation rate increased with increasing initial moisture content and showed a very significant correlation.

Suggested Citation

  • Yusong Deng & Gairen Yang & Zhifeng Xie & Jingrui Yu & Daihua Jiang & Zhigang Huang, 2020. "Effects of Different Weeding Methods on the Biomass of Vegetation and Soil Evaporation in Eucalyptus Plantations," Sustainability, MDPI, vol. 12(9), pages 1-22, May.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:9:p:3669-:d:353090
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    References listed on IDEAS

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    1. Rousseaux, M. Cecilia & Figuerola, Patricia I. & Correa-Tedesco, Guillermo & Searles, Peter S., 2009. "Seasonal variations in sap flow and soil evaporation in an olive (Olea europaea L.) grove under two irrigation regimes in an arid region of Argentina," Agricultural Water Management, Elsevier, vol. 96(6), pages 1037-1044, June.
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