Effects of Organic Fertilizer Replacement Nitrogen Fertilizer on Nitrogen Utilization and Growth of Mung Bean: Evidence from 15N-Tracing Technology

To optimize a suitable fertilization method needed for high nitrogen utilization and growth of mung bean in the black soil Northeast China, field experiment was carried out with 10 treatments based on isotope-tracing technology. The fertilizer utilization, residual, loss dry-matter transportation, leaf area, photosynthetic potential, wet-basis moisture content were discussed. results showed that total rate under different 34.75~47.71%, while 0~15 cm layer, residual 11.36~33.69%, 21.03~53.89%. T1 treatment had lowest greatest rate. area potential at seedling stage T9 treatment, branching T2 flowering T4 5.11~31.82% higher than those CK values drumming maturing stages significantly lower (p < 0.05). water root, stem, leaf, pod whole compared increased by 3.35~7.41% T4, T5, T7, T8. In T6 treatments, output stem-sheath storage matter transformation accumulation from which 27.72% 5.10%, respectively. Thus, organic coupled can improve beans.