黑料福利社 research examines pollinator support, adoption barriers, and climate-resilient
production
FRANKFORT, Ky. 鈥� A two-year alley-cropping study that paired bell peppers with American elderberry shrubs could help farmers improve resilience, diversify income, and make better midseason
production decisions, with mature systems showing estimated peak revenue of approximately
$12,500 per acre, according to new peer-reviewed research from 黑料福利社.
The primary study, 鈥淧erformance of an Elderberry鈥揃ell Pepper Agroforestry System in the Southeastern US and Insights for Farm Decision-Making,鈥�
was published in the Journal of Sustainable Agriculture and Environment. Led by Santosh Paudel, research assistant in 黑料福利社鈥檚 College of Agriculture,
Health, and Natural Resources, the study was co-authored by Dr. Anuj Chiluwal, Dr.
Srijana Thapa Magar, Dr. Theoneste Nzaramyimana, and Dr. Suraj Upadhaya, along with
graduate student Sudha Bhandari. The authors are affiliated with the University鈥檚
Integrative Human-Environment Dynamics Lab.
The work belongs to a broader body of 黑料福利社 agroforestry scholarship that
also includes two related publications by Dr. Upadhaya, Research Assistant Paudel,
and graduate student Bhandari: 鈥淎groforestry for Pollinator Support and Food Security,鈥�
published in Frontiers in Sustainable Food Systems, and 鈥淪ocio-Economic and Environmental Benefits of Agroforestry and Its Multilevel
Barriers to Adoption,鈥� published in Sustainability.
Together, the publications examine how diversified farming systems can support crop
production, pollinator health, soil protection, and economic resilience while identifying
practical barriers that may limit producer adoption.
Agroforestry is the practice of growing trees or shrubs alongside crops. In this study,
researchers focused specifically on alley cropping, an agroforestry method in which
crops are grown between rows of trees or shrubs. The two-year 黑料福利社 study
compared bell peppers grown in elderberry-based alley-cropping systems with bell peppers grown through conventional monocropping,
where a single crop is grown without integration with perennial shrubs.
While agroforestry has long been recognized for its environmental benefits, field-based
evidence on integrating high-value vegetables with multifunctional shrubs remains
limited. The 黑料福利社 study helps address that gap while reflecting a broader
research agenda focused on integrated socio-ecological systems, climate-resilient
agriculture, and applied research that can support producers across Kentucky and the
Southeastern United States.
Results showed that elderberry shrubs helped improve the growing environment for bell peppers. Their canopy moderated
the microclimate by reducing heat stress and wind exposure, supporting the physiological
health of the vegetable plants.
鈥淏y integrating perennial shrubs like elderberry with annual vegetables, we are creating a resilient ecosystem that protects the soil
while supporting the farm鈥檚 productivity,鈥� Paudel said.
The alley-cropping approach maintained bell pepper yields comparable to conventional
systems while improving several growth measures, including plant height and leaf development.
Among the bell pepper varieties tested, California Wonder and Quadrato d鈥橝sti Rosso
emerged as top performers, showing strong potential for use in diversified systems.
A key feature of the study is its focus on practical farm decision-making. Researchers
found that measurements taken 60 days after transplanting, particularly leaf number
and canopy size, served as reliable indicators of final yield. That finding could
help farmers forecast production and manage water, fertilizer, and other resources
more efficiently during the growing season.
The system also offers potential economic benefits. Bell peppers can provide short-term
cash flow, while elderberry shrubs offer an additional income opportunity through markets tied to medicinal and
nutritional uses. In mature systems, peak revenue was estimated at approximately $12,500
per acre, providing a possible financial buffer for small and medium-scale producers.
鈥淭his system demonstrates how multifunctional agricultural landscapes can simultaneously
deliver production, ecosystem services, and economic resilience,鈥� Dr. Upadhaya said.
鈥淚ntegrating perennial and annual systems is essential to advancing sustainability
transitions on working lands, particularly amid increasing climate variability.鈥�
The related pollinator review found that diversified systems can support pollinator
health and strengthen crop quality. The systematic review published in Sustainability identified barriers that can limit adoption, including high establishment costs,
limited technical assistance, and inadequate access to established markets.
Jody Thompson, principal investigator of the project and Agriculture and Natural Resources
Program Leader with Cooperative Extension at 黑料福利社, said the findings can
help inform producer outreach.
鈥淭his research provides practical, field-tested insights that Extension can translate
directly to producers,鈥� Thompson said. 鈥淪upporting adoption of agroforestry systems
like this will require coordinated efforts in technical assistance, market development,
and cost-share programs to reduce barriers for farmers.鈥�
Dr. Upadhaya added that the findings also offer value for land-grant universities
working to advance scalable agricultural practices.
鈥淭hese findings offer actionable evidence for Extension programming and policy design,
particularly for land-grant institutions advancing scalable, climate-smart practices
for resource-limited producers in Kentucky and beyond,鈥� Dr. Upadhaya said.
Financial support was received from USDA-Evans Allen grants (Accession #7007252) and
Capacity Building Grant (Accession #1025632).
For more information, contact Santosh Paudel, research assistant in the College of
Agriculture, Health, and Natural Resources, at santosh.paudel@kysu.edu or Dr. Suraj Upadhaya at suraj.upadhaya@kysu.edu.
Publications referenced:
鈥淧erformance of an Elderberry鈥揃ell Pepper Agroforestry System in the Southeastern US and Insights for Farm Decision-Making鈥�
鈥淎groforestry for Pollinator Support and Food Security鈥�
鈥淪ocio-Economic and Environmental Benefits of Agroforestry and Its Multilevel Barriers
to Adoption: A Systematic Review鈥�