Soil carbon, nitrogen, and potassium regulate herbaceous community stability in the restoration phases of desertification land

Abstract

Soil carbon, phosphorus, and nitrogen are crucial components that influence the stability of herbaceous plant communities in desertified land restoration. However, there is a dearth of data on the variables that impact the stability of herbaceous communities at various stages of restoration. This study investigated the variables of soil and plant communities on desertified land with varying recovery periods (recovery time less than 10 years, 10–20 years, and more than 20 years) to examine the alterations in the stability of herbaceous communities and the influence of soil nutrients on these changes. Our results indicated that the stability of herbaceous communities exhibited a positive correlation with recovery time. Further research suggests that total carbon (TC) and available nitrogen (AN) levels of soil significantly influenced the herbaceous community's stability when the recovery period was less than 10 years. Total nitrogen (TN) and TC levels of soil affected the community's stability when the recovery period ranged from 10 to 20 years. When the duration of recovery surpassed 20 years, available potassium (AK) in soil significantly impacted the community's stability. This suggested that soil nutrients influence the stability of the herbaceous community. Our findings suggest that soil nutrition is a crucial factor in the initial phase of ecological restoration on desertified land. These findings offer empirical evidence for comprehending the stabilizing mechanism of herbaceous communities in desertified land and provide theoretical backing for ecological restoration methods.