IMPACT OF NITROGEN FERTILIZER ON BIOLOGICAL NITROGEN FIXATION ANDGROWTH

摘要

Leguminous crops are the best-known dinitrogen (N_2) fixing systems and are becoming increasingly important in an attempts to further develop sustainable agriculture systems. Methods of enhancing N_2 fixation continue to be of maj or importance in efforts to decrease N fertilizer use and minimize ground water pollution. To meet the goal of making agriculture systems more sustainable, it is of importance to maximize use of N_2 fixing systems to maintain crop yields while minimizing impact on the environment from loss of N from the soil system. It will, therefore, require effort by researchers from several disciplines to enhance the symbiotic partnership and at the same time minimize N losses from the environment.