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- Title
Effects of chlorimuron-ethyl and urea on soil microbial biomass carbon and nitrogen and soil inorganic nitrogen.
- Authors
TAN Huan-bo; LI Xin-yu; ZHANG Hui-wen; LI Xu; XU Ming-kai
- Abstract
A microcosm experiment was conducted to study the effects of different concentration chlorimuron-ethyl ( 20, 200, and 2000 μg · kg-1 soil ) and its combination with urea (120 mg·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.
- Subjects
CHLORIMURON; UREA; SOIL microbiology; BIOMASS; CARBON; NITROGEN; AMMONIUM; APPLIED ecology
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2012, Vol 23, Issue 8, p2219
- ISSN
1001-9332
- Publication type
Article