Management practices to improve economic benefit and decrease greenhouse gas intensity in a green onion-winter wheat relay intercropping system in the North China Plain

Abstract

The simultaneous effects of N fertilizer management and straw returning on net economic benefit (NEB) and greenhouse gas intensity (GHGI) in a green onion-winter wheat relay intercropping system in the North China Plain are not well understood. A two-year field experiment was conducted to evaluate the effects of N fertilizer management and straw returning on yield, NEB, and GHGI, i.e. yield-scaled net global warming potential (NGWP) and NEB-scaled NGWP, over two seasons of green onion-winter wheat relay intercropping system. The five treatments included in the field experiment were no fertilization (CK), farmer's practice (FP), optimized fertilization (OPT), optimized fertilization with 25% ..