2种类型土壤对鸡粪与多肽肥中有机氮表观矿化量的影响

为了明确鸡粪和多肽肥在华南2种类型土壤中的供氮能力，采用田间小区试验，研究华南砂质壤土和壤质粘土施用鸡粪与多肽肥对苦瓜产量及其土壤有机氮、有机肥中有机氮表观矿化量的影响。结果表明，与鸡粪处理相比，多肽肥显著提高了植株生物量和苦瓜产量。土壤Nmin和有机氮表观矿化量在壤质粘土中显著高于砂质壤土。砂质壤土Nmin在多肽肥处理时显著高于鸡粪处理时，而壤质粘土Nmin在2种有机肥处理之间没有差异；施用多肽肥显著提高了2种类型土壤有机氮的表观矿化量；在砂质壤土中，有机肥中有机氮的表观矿化量在多肽肥处理时显著高于鸡粪处理时；在壤质粘土中，2种有机肥处理之间没有显著性差异。结果表明，土壤类型影响了土壤有机氮的矿化过程，多肽肥处理时土壤供氮能力优于鸡粪处理；多肽肥中有机氮的表观矿化效果在砂质壤土优于在壤质粘土中的表现。

The Effect of Different Soil Types on the Mineralization of Organic Nitrogen from Manure and Peptides Fertilizer in South China

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 Nml. 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.