Nitrogen Recoveries and Nitrogen Use Efficiencies of Organic Fertilizers with Different C/N Ratios in Maize Cultivation with Low-Fertile Soil by 15N Method

摘要: The rising cost of inorganic fertilizers, coupled with their adverse effects on soil conditions, has resulted in increasing interest organic amendments. objective the present study was to evaluate effect amendments (OAs) different C/N ratios nitrogen use efficiency (NUE) and recovery rate, as well growth yield Zea mays properties. A precise pot experiment conducted a low-fertile, sandy-loam soil, dynamics (N) were also analyzed by A-value method, using 15N tracer. plant height treatment groups decreased following order: fertilizer (IF) = rapeseed waste (RW) > chicken manure (CnM) bamboo tealeaf (BTL) cow (CwM) compost (BC). Furthermore, maize fertilized RW only took up half N IF, despite producing same yield, which indicates that physiological (PUE) twice high IF. CnM regarded valuable fertilizers could be used replace fertilizers. linear relationship between mineralization OAs obtained an incubation test experiments, estimating OA application maize. Maize plants mainly absorbed derived from fertilizers; however, for both sources (fertilizer soil), accumulated grains followed leaves, stem, root, suggesting studies should improve efficiency.