[Impact of Organic Amendment on the Bacterial Community and Rice Yield in Paddy Soil]

Area of Science:

• Soil Science
• Microbiology
• Agronomy

Context:

• Long-term field experiment (40 years) evaluating fertilization strategies.
• Focus on organic amendment effects on soil properties and rice yield.
• Comparison of no fertilizer (CK), NPK, NPK + green manure (NG), NPK + green manure + pig manure (NGM), and NPK + green manure + rice straw (NGS).

Purpose:

• To investigate the impact of organic amendment on soil microbial community structure and function.
• To assess the effects of different fertilization treatments on rice productivity.
• To identify key soil properties and microbial factors influencing rice yield.

Summary:

• Organic amendment significantly increased soil organic carbon (SOC), total nitrogen (TN), and total phosphorus (TP), with the NGM treatment showing the most improvement.
• Bacterial community composition shifted, with an increase in Proteobacteria and a decrease in Nitrospirota.
• Functional gene abundance related to organic carbon and nitrogen decomposition (e.g., cellulase, urease) increased, enhancing nutrient cycling.

Impact:

• Organic amendment improved soil fertility and rice yield, demonstrating the benefits of integrated nutrient management.
• Identified key soil properties (TP, SOC, pH, TN, DON) and microbial factors driving rice production.
• Findings provide insights into optimizing soil management practices for sustainable agriculture and enhanced crop yields.