论文部分内容阅读
为了研究水稻秸秆还田后对土壤酶以及土壤微生物数量的影响,文中以崇明滩盐碱土壤酶和微生物量为研究对象,利用田间试验方法,对不同秸秆还田量以及不同泡水时间的土壤过氧化氢酶、磷酸酶、脲酶进行了测定,另外还利用稀释平板法对土壤细菌、真菌和放线菌进行了测定。结果发现:S1W1、S2W3处理均极大提高了土壤尿酶、蔗糖酶和过氧化氢酶活性,促进了土壤细菌、真菌、放线菌数量的增长;脲酶活性和过氧化氢酶活性显著负相关,S3W4、S2W3、S2W1、S3W3能极大提高土壤中脲酶的活性,而S1W2、S1W1、S2W2、S3W1、S2W3极大提高过氧化氢酶的活性。通过文中研究的结果,得到了水稻秸秆还田的科学还田量以及水淹时间,这为合理利用水稻秸秆资源提供科学依据。
In order to study the effect of rice straw on soil enzyme and soil microbial quantity, the paper takes the soil enzyme and microbial biomass in Chongmingtan saline-alkali soil as the research object. By using field experiment, the effects of different straw returning amount and soil water content Catalase, phosphatase and urease were measured. In addition, the soil bacteria, fungi and actinomycetes were also tested by dilution plate method. The results showed that both S1W1 and S2W3 treatments significantly increased soil urease, sucrase and catalase activities and promoted the growth of soil bacteria, fungi and actinomycetes. There was a significant negative correlation between urease activity and catalase activity , S3W4, S2W3, S2W1 and S3W3 can greatly increase the activity of soil urease, and S1W2, S1W1, S2W2, S3W1 and S2W3 greatly enhanced the activity of catalase. Through the research results in this paper, the amount of straw returning to the field and the flooding time are obtained, which provides a scientific basis for the rational utilization of rice straw resources.