Abstract
BackgroundRatooning in sugarcane is a crucial strategy for ensuring the long-term sustainability of the sugarcane industry. Knowledge gap relating to the interaction between rhizosphere microbiome and ratooning crop, particularly the impact of different sugarcane cultivars on the rhizosphere microbiome in consecutive ratooning, requires additional research. The response of two different sugarcane cultivars, viz ZZ-1 and ZZ-13, were evaluated in consecutive ratooning towards the rhizosphere microbial community and cane morphological characters.ResultsSignificant changes in the rhizosphere microbiome were observed in the second ratooning over the years. Several important genera were observed in high abundance during the second ratooning, including Burkholderia, Sphingomonas, Bradyzhizobium, and Acidothermus. Cultivar ZZ-13 caused more alterations in the rhizosphere microbiome than ZZ-1, resulting in a more favorable rhizosphere environment for sugarcane growth. The genotypes also varied in terms of nutrients and enzyme activity over the years. There were significant differences between the genotypes and year for number of stalks and yield was significant for genotypes, years and genotype × year.ConclusionThis finding will help to understand thorough interactions between rhizosphere microorganisms and ratoon sugarcane and lay the foundation for promoting and maximizing yield as far as possible. In the future, this work can serve as guidance in sugarcane husbandry, mainly in Guangxi, China.
Highlights
Sugarcane (Saccharum officinarum L.), the first significant sugar crop worldwide, is an important cash crop in tropical and subtropical countries
The results showed a 9.12 and 15.69% for ZZ-13 and ZZ-1 stem diameter increase in 2020 compared to 2019, respectively
Compared to 2019, the soil nutrients increased effectively in 2020. These findings suggested that a sugarcane cropping strategy based on ratooning could effectively increase soil fertility
Summary
Sugarcane (Saccharum officinarum L.), the first significant sugar crop worldwide, is an important cash crop in tropical and subtropical countries. Sugarcane plays a crucial role in farmer economics and provides raw materials to the industry in Southern China [1]. Ratooning is the ability of sugarcane to maintain yield, a desirable character to improve the economics of sugarcane production [2], which is a common practice worldwide and accounts for almost 50% of the total sugarcane planting areas. Ratooning in sugarcane is a crucial strategy for ensuring the long-term sustainability of the sugarcane industry. Knowledge gap relating to the interaction between rhizosphere microbiome and ratooning crop, the impact of different sugarcane cultivars on the rhizosphere microbiome in consecutive ratooning, requires additional research. The response of two different sugarcane cultivars, viz ZZ-1 and ZZ-13, were evaluated in consecutive ratooning towards the rhizosphere microbial community and cane morphological characters
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