Effects of the Continuous Cropping of Amomum villosum on Rhizosphere Soil Physicochemical Properties, Enzyme Activities, and Microbial Communities

Abstract

Amomum villosum, which is an important perennial medicinal plant, easily suffers from continuous cropping obstacles in the plantation. The aim of this study is to find an effective method to solve the problem of A. villosum continuous cropping. In this study, we analyzed four fields in which A. villosum was continuously cropped and a fallow field to reveal the effects of continuous cropping on the rhizosphere soil physicochemical properties, enzyme activities, and bacterial and fungal communities. Most of the soil nutrient contents gradually increased as the number of years of continuous cropping increased, whereas the soil pH decreased slightly. The soil urease and acid phosphatase activities tended to increase as the length of the continuous cropping period increased, which may have accelerated the conversion of soil substances. Furthermore, the alpha diversity of the bacterial and fungal communities decreased as the duration of the continuous cropping period increased. Additionally, the redundancy analysis revealed that bacterial and fungal community structures at the phylum level were the most correlated with pH value and catalase activity, respectively. This study may be useful for promoting the continuous cropping and sustainable development of A. villosum.

Effect of continuous planting on Casuarina equisetifolia rhizosphere soil physicochemical indexes, microbial functional diversity and metabolites

“…Continuous monoculture of plants may lead to changes in the physicochemical indexes of the rhizosphere soil, which in turn changes the nutrient content of the soil and affects plant growth ( Guo et al., 2022 ; Wang et al., 2022 ). In this study, as the number of continuous planting of C. equisetifolia increased (M1-M3).…”

Effects of continuous monoculture on rhizosphere soil nutrients, growth, physiological characteristics, hormone metabolome of Casuarina equisetifolia and their interaction analysis

“…Continuous planting was very likely to cause alterations in soil physicochemical indexes, thus affected plant growth [ 28 , 29 ]. In this study, it was found that the plant height and biomass of C. equisetifolia decreased significantly with the increase of continuous planting number, and the root growth of C. equisetifolia was significantly inhibited.…”

Metagenomics-based exploration of key soil microorganisms contributing to continuously planted Casuarina equisetifolia growth inhibition and their interactions with soil nutrient transformation

“…Long-term monoculture of plants can easily lead to deterioration of soil texture, which in turn affects plant growth ( Guo et al., 2022a ; Wang et al., 2022a ). Soil is important for plants to obtain nutrients, and the content of nutrients in the soil and its ability to transform them directly affects plant growth, especially available nutrients ( Soares et al., 2019 ).…”