• Muhammad Shoaib Rana

• Ghulam Murtaza

• Chengxiao Hu

• Xuecheng Sun

• Muhammad Imran

• Javaria Afzal

• Ali Mohamed Elyamine

• Zaid Khan

• Muhammad Riaz

• Muhammad Shaaban

• Muhammad Irfan Waris

تلخیص

Nitrogen management is a major challenge in the environment due toNO3 - leaching and volatilization. To address this problem, a lysimeter experiment was conducted for rice-wheat with two lower N rates (15 and 30%) and three higher rates (15, 30 and 45%) than recommended rate (N100%). Higher leaching of NO3 - was noted with N145% up to86.84 mg/leachate in rice while wheat crop showed maximum leaching 48.62 mg/leachate in same treatment. This revealed that during the rice-wheat rotation, NO3 - leaching losses were the highest during rice growth than that of wheat. The uppermost rice-wheat grain yield was obtained with 15% higher N. The highest rice-wheat NUE was 31.26 g/g and 45.52 g/g with treatment N115%, respectively. It is concluded that treatment of N115%proved to be efficient than other treatments due to enhanced NUE and yield by reducing NO3 − leaching losses. The findings of current study can be helpful to develop proper N fertilizer management strategies for rice-wheat rotation.

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