The AEF of farmyard manure(FYM) in NPK +M treatment was 21 kg/t of wheat and 25 kg/t for corn,while the AEF of crop straw in NPK+S treatment was negative for wheat and 37 kg/t for corn. Soil O.

• 有机肥对小麦和玉米的农学效率分别为21 kg/t和25 kg/t,秸秆对小麦和玉米的农学效率分别为负值和37 kg/t。