Effect of <i>Areca catechu</i> L. Intercropping <i>Pandanus amaryllifolius</i> Roxb. on Soil Microbial Diversity and Richness
Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2022, Vol. 43 ›› Issue (1): 101-109.DOI: 10.3969/j.issn.1000-2561.2022.01.014

• Plant Cultivation, Physiology & Biochemistry • Previous Articles     Next Articles

Effect of Areca catechu L. Intercropping Pandanus amaryllifolius Roxb. on Soil Microbial Diversity and Richness

ZHONG Yiming1,2, WANG Zhiyong1, QIN Xiaowei2, LIAO Li1,*(), ZHANG Ang2,*(), YU Huan2, JI Xunzhi2   

  1. 1. Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education / College of Forestry & College of Tropical Crops, Hainan University, Haikou, Hainan 570228, China
    2. Spice and Beverage Research Institute, Chinese Academy of Tropical Agricultural Sciences / Hainan Provincial Key Laboratory of Genetic Improvement and Quality Regulation for Tropical Spice and Beverage Crops / Key Laboratory of Genetic Resource Utilization of Spice and Beverage Crops, Ministry of Agriculture and Rural Affairs, Wanning, Hainan 571533, China
  • Received:2021-05-27 Revised:2021-08-18 Online:2022-01-25 Published:2022-01-27
  • Contact: LIAO Li,ZHANG Ang

Abstract:

Areca catechu L. is an important tropical cash crop in Hainan Province. Developing Areca catechu L. understory economy is very important for the sustainable development of agriculture. Pandanus amaryllifolius Roxb. is a perennial tropical spice plant, which is shade resistant and suitable for intercropping under Areca catechu L. forest. The aim of this study is to explore the effects of Areca catechu L. and Pandanus amaryllifolius Roxb. on the abundance and diversity of soil microbial communities. By clarifying the differences in the structure and diversity of microbial communities under different planting patterns and their key driving factors, reveal the physical and chemical properties of the soil and the internal relationship between the microenvironment and the structure of the microbial community. This study would provide a theoretical basis for maintaining the soil health of Areca catechu L. forest, and provide a theoretical basis for elucidating the dynamic balance mechanism of soil microbial community under Areca catechu L. intercropping Pandanus amaryllifolius Roxb. model, also provide data support for optimizing the intercropping Pandanus amaryllifolius Roxb. model under Areca catechu L. forest. A randomized block design was adopted in this experiment. Field experiments were established with Areca catechu L. mono-cropping, Areca catechu L. intercropping Pandanus amaryllifolius Roxb. and Pandanus amaryllifolius Roxb. mono-cropping, respectively. The field experiments were repeated three times in Wanning, Qionghai and Lingshui, Hainan Province. The soil physical and chemical properties, nutrient content, soil microbial abundance and diversity were measured to explore the effect of intercropping model on soil microbial community structure. The abundance of soil bacteria in the intercropping were significantly lower than those in the mono-cropping treatments. The fungal abundance rather than diversity increased significantly in intercropping. There was no significant difference in fungal abundance and diversity index among different regions. The abundance and diversity of bacteria varied significantly among the three study plots. There was a significant positive correlation between bacterial abundance and diversity and soil bulk density, organic matter content and soil pH. However, bacterial abundance and diversity were significant negative correlation with water content. The intercropping model significantly inhibited the abundance and diversity of soil bacterial community by reducing the contents of soil organic matter and available potassium in this study. Soil organic matter, available potassium, soil bulk density and pH are the key factors driving the change of soil. In the intercropping mode, appropriate supplement of organic and potassium fertilizer was contributed to maintain the relative stability of soil microbial community structure and soil health.

Key words: Areca catechu L., Pandanus amaryllifolius Roxb., intercropping, microbial community structure, soil health

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