Research Progress and Development Trends of Greenhouse Gas Emissions from Cereal–Legume Intercropping Systems

Abstract

High yields and low carbon emissions are new challenges for modern crop production. Balancing the crop yield and reducing greenhouse gas (GHG) emissions has become a new field of agronomic technology innovation. Cereal–legume intercropping is a typical diversification planting system, which has been expected to achieve the dual goals of high production and low GHG emissions. However, the synergistic effect of integrating various technologies in an intercropping system on GHG emissions and whether it will achieve the high yield and low emissions goal remains to be determined. Therefore, bibliometric analysis has investigated the worldwide development trend of cereal–legume intercropping designs. The literature on the GHG emissions of the cereal–legume intercropping system was summarized. Additionally, the effects and mechanisms of different agricultural management methods regarding soil nitrous oxide and carbon dioxide emissions in the cereal–legume intercropping system were summarized. The research on GHG emissions of cereal–legume intercropping systems in non-growing seasons must be revised. In situ observations of GHG emissions from intercropping systems in different regions should be strengthened. This work is valuable in supporting and evaluating the potential of GHG reduction in a cereal–legume intercropping system in various farming areas.

Sustainability of Organic Farming from a Global Perspective: A Critical Analysis of Soil Types and Fertility Status of Organically Managed vs. Chemicalized Vegetable Fields of South India

“…However, the current study reveals that about 38% of organic elds in the region have N content above 190 kg ha − 1, whereas 56.25% of chemicalized elds show N content above that critical level. However, the chemicalized elds show a signi cantly high percentage of global warming potential; the data indicate that some of the organic elds are similar to the chemicalized elds in N content, especially the 3.52% elds showing N > 560 kg ha − 1 because the natural means to control freely available N in the eld soil (Yao et al, 2023) per organic agricultural norms are not found in such elds. Another reason for an excessive N in organic elds is the application of poultry manure rich in N content by farmers in organic areas without a limit.…”

Agronomic Responses of Sweet Corn - Peanut Intercropping to Liquid Organic Fertilizer Grown in Different Dosages of Vermicompost

“…The use of legume species in crop rotation of organic sweet corn production systems is inevitably practiced to maintain the quality of land resources and sweet corn productivity. Although cereallegume intercropping is a typical planting strategy for diversification that has been developed to accomplish the double objectives of high output and low greenhouse gas emissions (Yao et al, 2023), more cereal-legume intercropping research needs to be conducted, especially in organic vegetables production system. A challenge specific to sweet corn-peanut intercropping under organic production systems is ensuring both sweet corn and peanut benefit from this cropping system.…”