How do different nitrogen application levels and irrigation practices impact biological nitrogen fixation and its distribution in paddy system?

Yanhui Zhang, Tianlong Hu, Hui Wang, Haiyang Jin, Qi Liu, Zhibin Lin, Benjuan Liu, Hongtao Liu, Zhe Chen, Xinwu Lin, Xiaojie Wang, Jing Ma, Delin Sun, Xiaoli Sun, Haoye Tang, Qicheng Bei, Francesco Cherubini, Hans Peter H. Arp, Zubin Xie