A new study published in Grassland Research provides insights into the potential benefits of diversifying agricultural practices, revealing how different mixtures of plant species can improve production, quality, and conservation.
For the study, investigators planted multiple species in different grassland plots, manipulating plant species richness from one to six species spanning three functional groups (legumes, herbs, and grasses). Certain mixtures led to increases in plant productivity and invasion resistance. Also, different plant species drove different functions, with legumes and herbs benefiting plant productivity and water availability, and grasses improving invasion resistance. Legumes were also highly beneficial for maintaining soil nitrogen.
"While the specific plant species and functional groups used in the study may vary across regions, the concept of using multispecies mixtures to enhance multifunctionality and promote both production and biodiversity can be applicable in various agricultural contexts around the world," said corresponding author Laura Argens, a Ph.D. student at the Technical University of Munich, in Germany.
The farmers boosting crops with electricity
Intensive agriculture is based on the use of high-energy inputs and quality planting materials with assured irrigation, but it has failed to assure agricultural sustainability because of creation of ecological imbalance and degradation of natural resources. On the other hand, intercropping systems, also known as mixed cropping or polyculture, a traditional farming practice with diversified crop cultivation, uses comparatively low inputs and improves the quality of the agro-ecosystem. Intensification of crops can be done spatially and temporally by the adoption of the intercropping system targeting future need. Intercropping ensures multiple benefits like enhancement of yield, environmental security, production sustainability and greater ecosystem services. In intercropping, two or more crop species are grown concurrently as they coexist for a significant part of the crop cycle and interact among themselves and agro-ecosystems. Legumes as component crops in the intercropping system play versatile roles like biological N fixation and soil quality improvement, additional yield output including protein yield, and creation of functional diversity. But growing two or more crops together requires additional care and management for the creation of less competition among the crop species and efficient utilization of natural resources. Research evidence showed beneficial impacts of a properly managed intercropping system in terms of resource utilization and combined yield of crops grown with low-input use. The review highlights the principles and management of an intercropping system and its benefits and usefulness as a low-input agriculture for food and environmental security.
