Integrated Fertilizer Strategy Increases Tobacco Yields While Cutting Nitrogen and Phosphorus Water Pollution

Discover how an integrated organic-mineral fertilizer strategy reduces nitrogen and phosphorus runoff in tobacco fields while increasing crop value by 8.8%.

By: AXL Media

Published: Apr 30, 2026, 8:36 AM EDT

Source: Information for this report was sourced from EurekAlert!

The Environmental Crisis Facing China’s Major Drinking Water Sources

Agricultural intensification in the Erhai Lake Basin has led to a critical increase in nitrogen and phosphorus loads within local water bodies, threatening essential drinking water supplies. Traditional, intensive fertilization methods used in tobacco cultivation often result in significant nutrient leaching and runoff, which serve as primary triggers for lake eutrophication. As the demand for high crop yields persists, the regional challenge has focused on finding a sustainable balance between maintaining agricultural output and protecting the delicate aquatic ecosystem from further chemical degradation.

A Multi Agency Collaborative Effort Toward Sustainable Tobacco Farming

To address these escalating environmental concerns, a research consortium including China Agricultural University and the Yunnan Academy of Tobacco Agricultural Sciences launched an in depth field experiment. Between 2021 and 2022, the team established a controlled testing site in Sanying Town to evaluate four distinct fertilization treatments, ranging from zero input to purely organic and mineral combinations. This systematic comparison aimed to isolate the most effective strategy for stabilizing tobacco output value while minimizing the biological footprint left on the surrounding Erhai Lake watershed.

The Economic and Ecological Gains of Integrated Nutrient Management

The study concluded that the combination of organic and mineral fertilizers, referred to as the OMC treatment, outperformed traditional farmer practices in both fiscal and environmental metrics. According to the published data, this specific integrated approach increased tobacco yield by 3.8 percent and boosted the total output value by 8.8 percent. More importantly, it successfully reduced total nitrogen runoff by 2.7 kilograms per hectare and cut leaching losses by 21 percent, proving that economic growth in tobacco farming does not necessitate environmental destruction.