本文对省内部分桑园土壤分0~20、20~40cm两个土层,应用比色法测定其脲酶活性及氨含量,并用选择培养基法检测了土壤中细菌、放线菌、真菌三大类微生物的含量。结果表明各地桑园土壤中脲酶活性和微生物含量存在较大差异。在所检测的土样中,吴江松陵桑园土样脲酶活性最高,而射阳特庸桑园土壤脲酶活性最低。另外,脲酶活性与微生物含量及土壤氨含量有关。 In this paper, some mulberry fields in the province were divided into two soil layers of 0 ~ 20 and 20 ~ 40cm. The urease activity and ammonia content of the mulch soil were determined by colorimetric method. The contents of bacteria, actinomycetes, Category of micro-organisms content. The results showed that there was a big difference in urease activity and microbial content in mulberry soil around. Among the soil samples tested, the soil urease activity of Songling mulberry garden in Wujiang was the highest, while the activity of urease in the mongol garden was the lowest. In addition, urease activity and microbial content and soil ammonia content.