基于生命周期法的中国2004—2015年油菜生产氮足迹分析
陈中督,徐春春,纪龙,方福平

Assessment of the nitrogen footprint in oilseed rape production of China during 2004 to 2015 base on life cycle assessment method
Zhong-Du CHEN,Chun-Chun XU,Long JI,Fu-Ping FANG
图4 中国油菜产量与单位面积氮足迹(a)和单位产量氮足迹(b)的关系
Fig. 4 Relationship between the yield of rapeseed and nitrogen footprint per unit area (a) or nitrogen footprint per unit yield (b) in China