采用室内模拟实验法,测定了嗪吡嘧磺隆在好氧与积水厌气(或厌氧)条件下的土壤降解和水-沉积物降解特性.研究结果表明,嗪吡嘧磺隆在好氧条件下,江西红壤、太湖水稻土、东北黑土中降解速率分别为0.041、0.008、0.004 d-1,积水厌气条件下分别为0.028、0.023、0.005 d-1,不同类型土壤中降解快慢顺序为:江西红壤>太湖水稻土>东北黑土,在太湖水稻土和东北黑土中积水厌气条件更有利于其降解,且土壤p H值是影响土壤中降解速率的主要因素;水-沉积物降解中,好氧条件下河流与湖泊水-沉积物系统中农药总量的降解速率分别为:0.031、0.032 d-1,厌氧条件下的降解速率分别为0.035、0.041 d-1,湖泊体系的降解速率快于河流体系,厌氧条件下降解速率快于好氧条件,且嗪吡嘧磺隆在水-沉积物体系中主要存在于水体中,系统降解速率主要受水体中的降解速率影响.可见,嗪吡嘧磺隆在中性至碱性土壤中具有较强稳定性,进入水-沉积物系统时主要分布于水体当中,可能会对水体和土壤环境造成一定的污染影响. Soil biodegradation and water-sediment degradation characteristics of tribenuron-methyl under anaerobic and anaerobic conditions of stagnant water were measured by laboratory simulation. The results showed that triazine was good Under oxygen conditions, the degradation rates of red soil in Jiangxi Province, paddy soil in Taihu Lake and northeast China were 0.041,0.008,0.004 d-1 and 0.028,0.023,0.005 d-1 in stagnant water, respectively. The degradation rates in different soil types The sequence is as follows: Jiangxi red soil> Taihu paddy soil> northeastern black soil, and the anaerobic conditions in the paddy soils of Taihu Lake and northeastern China are more conducive to their degradation, and soil p H value is the main factor affecting the rate of soil degradation; Under biodegradation, the degradation rates of total pesticides in rivers and lakes water-sediment systems under aerobic conditions were 0.031 and 0.032 d-1, respectively, and the degradation rates under anaerobic conditions were 0.035 and 0.041 d-1, respectively The degradation rate of the system is faster than that of the river system, and the degradation rate under anaerobic conditions is faster than that of the aerobic conditions. The pyrazasulfuron is mainly present in the water-sediment system, and the degradation rate of the system is mainly affected by the degradation rate Effect. Visible, pyrazinulfuron in When sediments are mainly distributed system in which water, cause some pollution might affect water and soil environment - to have a strong stability in alkaline soil, into the water.