Abstract:

In order to clarify the nitrogen supply of manure and peptide fertilizer in two types of soil in southern China, a field experiment was carried out to study the effect of manure and peptide fertilizer on Momordica charantia yield and the mineralization of soil organic nitrogen in both sandy loam soil and loamy clay soil. The main results were as followed: peptide fertilizer significantly increased plant biomass and production compared to chicken manure fertilizer. Soil Nmin and the apparent mineralization of organic nitrogen in the clay loam soil were significantly higher than those in the sandy loam. Nmin with peptide fertilizer was significantly higher than that in the chicken manure treatment in sandy loam soil. However, in loamy clay soil Nmin had no difference between peptide fertilizer and chicken manure treatment. The application of peptide fertilizer application significantly increased the apparent mineralization of soil organic nitrogen regardless of sandy loam or loamy clay soil. In the sandy loam soil, the apparent mineralization of organic nitrogen in organic fertilizer for peptide treatment was significantly higher than that in chicken manure treatment, however, in the loamy clay soil, there was no significant differences for the two treatments. In conclusion, the soil type affected the mineralization of soil organic nitrogen, the supply of soil nitrogen with peptide fertilizer application was better than chicken manure treatment, and the apparent mineralization of organic nitrogen in peptide fertilizer in the sandy loam soil was better than that in loamy clay soil.