Applications of Chaetomium globosum CEF-082 improve soil health and mitigate the continuous cropping obstacles for Gossypium hirsutum

作者：棉花生物学国家重点实验室 日期：2023-03-21 访问量：

Xiaojie Ma, Yalin Zhang, Feng Wei, Lihong Zhao, Jinglong Zhou, Guangrong Qi, Zheng Ma, Heqin Zhu, Hongjie Feng, Zili Feng

Industrial crops and products

Doi: 10.1016/j.indcrop.2023.116586

Abstract：

Serious crop diseases caused by soil microecological disturbances have been considered important causes of continuous cropping obstacles. Continuous long-term farming of cotton, an important cash crop, can lead to cotton yield and quality decline and the aggravation of soil-borne pathogens, such as Verticillium dahliae. A pot experiment was carried out in the continuous cropping cotton field soil of Xinjiang to investigate the impact of the biocontrol fungus Chaetomium globosum CEF-082 on removing the barrier to continuous cropping in cotton fields and its impact on soil microecology in cotton fields. The addition of CEF-082 increased the diversity and abundance of bacterial species, decreasing the abundance of pathogenic fungi, such as Fusarium and Verticillium, and decreasing the abundance ratio of fungi to bacteria (F/B) in soil according to high-throughput sequencing of cotton rhizosphere soil. Furthermore, the application of CEF-082 enhanced soil enzyme activity and soil pH value, controlled soil nutrient levels, and reduced the soil C/N ratio through the cotton root surrounding the soil nutrient level and enzyme activity change test. These modifications imply that the use of the biocontrol fungus CEF-082 may improve soil health, reduce the prevalence of soil-borne pathogens, restore damaged soil microecology, and have a favorable impact on easing the obstacles of continuous cotton cropping.