Journal of the Science of Food and Agriculture, Год журнала: 2024, Номер 105(3), С. 1914 - 1929

Опубликована: Окт. 21, 2024

Abstract BACKGROUND Cereal–legume intercropping provides a solution for achieving global food security, but the mechanism of greenhouse gas emissions and net ecosystem economic benefits maize–soybean relay are poorly understood. Hence, we conducted two‐factor experiment to investigate effects cropping systems, containing (IMS), monoculture maize (M) soybean (S), as well three nitrogen levels at 0 (N0), 180 (N1), 240 (N2) kg N ha −1 on crop grain yield, emissions, soil carbon stock benefit (NEEB). RESULTS The average yield IMS (7.7 t ) increased by 28.5% 242.4% compared with M (6.0 S (2.2 ). land equivalent ratio (LER) was 2.0, which mainly contributed (partial LER: 1.2) rather than 0.8). Although total remarkably enhanced 43.6% 45.5% in N1 N2 contrast N0, LER 37.5% 38.6% lower N0. warming potential (GWP) 11.6% 1.8% corresponding monoculture, resulted from decline GWP organic rate. Moreover, NEEB 133.5% higher (14 032.0 Chinese yuan per year) M, resulting an increase gains cost. A more robust response gain costs inputs led 46.8% 48.3% CONCLUSION Maize–soybean application can obtain advantages without raising environmental costs, approach sustainable agricultural production. © 2024 Society Chemical Industry.

Язык: Английский