supported by the National Basic Research Program of China (973 Program,2007CB109308);the National High-Tech R&D Program of China (2007AA06Z332);a special grant of Application of Nuclear Techniques in Agriculture from the Ministry of Agriculture of China (200803034)
Rational application of nitrogen (N) fertilizers is an important measure to raise N fertilizer recovery rate and reduce N loss.A two-year field experiment of rice-wheat rotation was employed to study the effects of ...