Abstract:

The aim was to utilize polypeptides organic compound fertilizer reasonably. In this paper, effects of polypeptides organic compound fertilizer on growth and physical properties of Vigna sinensis (L.) Savi were studied in field. The results showed that polypeptides organic compound fertilizer could promote the growth and the contents of Vc, while the contents of nitrate were decreased in Nanhai and Zengcheng region. In addition,the growth did not change by applying polypeptides organic compound fertilizer in the Baiyun region. The application of polypeptides organic compound fertilizer did not decrease the soil particle density significantly in the three regions. The combination of polypeptides organic compound fertilizer with chemical fertilizer decreased the soil bulk density significantly, increased porosity in Baiyun region. Soil bulk density reduced and soil porosity did not increase by applying combined polypeptides organic compound fertilizer with chemical fertilizer in Nanhai region. The combination of polypeptides organic compound fertilizer with chemical fertilizer did not decrease the soil bulk density significantly and did not increase porosity in the Baiyun region. In the three regions soil, water holding capacity was enhanced greatly by application of polypeptides organic compound fertilizer. The combination of polypeptides organic compound fertilizer with chemical fertilizer decreased the soil bulk density significantly, increased porosity, and soil water holding capacity, which was better than chicken manure, and was better in the sandy loam soil than in the clay loam.