The International Journal of Life Cycle Assessment recently published a study by Natalia Salgado, Danya K. Jurado-Erazo, Juan David Galvis-Nieto, Jorge M. Narvaez, German Franco, Walter Ricardo López, Carlos A. Cardona A., and Carlos Eduardo Orrego A. that examines the production of the Rocoto chili pepper. This specific variety, known scientifically as Capsicum pubescens, is a staple in tropical gastronomy and holds significant market potential in high-altitude regions like Manizales, Colombia. The research team explored how different farming techniques, including the use of low-tech greenhouses and various fertilizers, influence the actual quality and environmental cost of the crop. By moving beyond traditional measures that only look at the total weight of a harvest, the researchers developed a new framework that considers the bioactive strength of the pepper as the primary goal of production.

The results of the year-long experiment indicate that the choice of cultivation environment and nutrient management are the most critical factors in determining both success and sustainability. While conventional greenhouse farming using standard chemical fertilizers produced the highest overall volume of fruit at more than twenty-two tons per hectare, it resulted in a significantly weaker pungency. In contrast, the systems that utilized organic biochar—a mixture of vegetable charcoalCharcoal is a black, brittle, and porous material produced by heating wood or other organic substances in a low-oxygen environment. It is primarily used as a fuel source for cooking and heating.   More and pig manure leachate—yielded fruits with superior chemical potency. The organic greenhouse system achieved a substantial yield of nearly seventeen tons per hectare while reaching a pungency level of over one hundred twenty-five thousand Scoville Heat Units. This finding suggests that organic methods can compete effectively with industrial practices when the goal is to produce a high-quality, potent spice.

From an environmental perspective, the study demonstrated that the integrated organic greenhouse approach is the most sustainable strategy available to growers. This system exhibited the lowest environmental impact in nearly every category assessed, including a remarkably low climate change footprint. Specifically, the biochar-based greenhouse model achieved a massive reduction in greenhouse gas emissions when compared to conventional open-field farming. Much of this benefit comes from the ability of biocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More to lock carbon into the soil and reduce the need for synthetic fertilizers, which are major contributors to global pollution. The greenhouse structure also provided a stable microclimate that filtered harsh radiation and managed humidity, allowing the plants to thrive without the stress seen in open-field scenarios.

The researchers found that growing peppers in open fields generally led to suboptimal outcomes, including lower yields and reduced heat levels. In these outdoor settings, the plants were more exposed to environmental stressors like wind and excessive solar radiation, which disrupted their natural growth cycles. Furthermore, open-field systems that relied on synthetic chemicals were responsible for high levels of human toxicity and soil degradation. The study noted that conventional fertilizers accounted for a large portion of the total climate impact in these scenarios. By contrast, the biochar scenarios proved to be highly effective at protecting soil health and enlivening the nutrient signaling pathways that allow peppers to develop their characteristic heat.

Ultimately, the study proves that prioritizing the quality and bioactive content of a crop can transform how we evaluate agricultural efficiency. By using a pungency-based measurement, the team showed that a smaller amount of high-quality organic fruit can provide the same value as a larger amount of lower-quality conventional fruit, but with a much lighter burden on the planet. This approach provides a clear roadmap for small-scale farmers in Andean regions and beyond to align their production goals with environmental preservation. The findings highlight biochar as a powerful tool for sequestering carbon and improving soil functionality while simultaneously enhancing the medicinal and commercial value of high-value crops like the Rocoto chili.

Source: Salgado, N., Jurado-Erazo, D. K., Galvis-Nieto, J. D., Narvaez-Perez, J. M., Franco, G., López, W. R., Cardona, C. A., & Orrego, C. E. (2026). Environmental impact of rocoto chili pepper production: integrated assessment of yield, bioactive composition, and environmental footprint. The International Journal of Life Cycle Assessment, 31(73), 1-22.