Tan Huan-Bo, Li Xin-Yu, Zhang Hui-Wen, Li Xu, Xu Ming-Kai
State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, China.
Ying Yong Sheng Tai Xue Bao. 2012 Aug;23(8):2219-24.
A microcosm experiment was conducted to study the effects of different concentration chlorimuron-ethyl (20, 200, and 2000 microg x kg(-1) soil) and its combination with urea (120 mg x kg(-1) soil) on the dynamic changes of soil microbial biomass carbon and nitrogen and soil nitrate nitrogen and ammonium nitrogen. Applying chlorimuron-ethyl alone decreased the soil microbial biomass carbon and nitrogen throughout the experiment period (60 days), and the decrement increased with increasing chlorimuron-ethyl concentration. Chlorimuron-ethyl had little effects on the soil ammonium nitrogen and nitrite nitrogen in the early period of the experiment, but increased the soil ammonium nitrogen in the mid-period (15 d) and the soil nitrate nitrogen in the late period (after 30 days) significantly. Both urea addition and its combination with chlorimuron-ethyl increased the soil microbial biomass carbon and nitrogen obviously in a short time, but the effect of combined addition of urea and chlorimuron-ethyl weakened then. Applying urea and its combination with chlorimuron-ethyl resulted in a lasting increase of soil nitrate nitrogen and ammonium nitrogen.
进行了一项微观实验，以研究不同浓度氯嘧磺隆（20、200和2000微克·千克⁻¹土壤）及其与尿素（120毫克·千克⁻¹土壤）组合对土壤微生物量碳、氮以及土壤硝态氮和铵态氮动态变化的影响。单独施用氯嘧磺隆在整个实验期（60天）内降低了土壤微生物量碳和氮，且随着氯嘧磺隆浓度增加降幅增大。氯嘧磺隆在实验前期对土壤铵态氮和亚硝酸盐氮影响较小，但在中期（15天）显著增加了土壤铵态氮，在后期（30天后）显著增加了土壤硝态氮。添加尿素及其与氯嘧磺隆的组合在短时间内明显增加了土壤微生物量碳和氮，但尿素与氯嘧磺隆组合添加的效果随后减弱。施用尿素及其与氯嘧磺隆的组合导致土壤硝态氮和铵态氮持续增加。
