nitrate-nitrogen

常见例句

There was a tendency of increase of nitrate-nitrogen and decrease of ammonia-nitrogen along the FPB column, indicating a significant nitrification activity.
沿流化床高度，水中氨氮浓度呈沿程降低的趋势，而硝态氮浓度呈增大趋势，表明硝化作用比较明显。
An experiment in field and artificial penetration-filter pond test both were conducted to show factors affecting content of nitrate-nitrogen in soil in the present study.
采用田间试验及人工渗滤池试验方法，研究了土壤中硝态氮含量的影响因素。
The effects of management practices in farmland including tillage practices, nitrogen-fertilizer and water management on nitrate-nitrogen transport in soil were reviewed.
从农业耕作措施、氮肥管理、水管理等田间管理措施对土壤硝态氮迁移的影响方面进行了综述，指出了研究中存在的问题与发展趋势。