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System Establishment of Herbicide Monitoring and Analysis in the Climate of Taiwan's Paddy Field (II)
|關鍵字:||技術發展;fate of herbicides;農業化學類, 農業環境保護;除草劑流向;水田;監測;paddy field;monitoring||摘要:||
The purpose of this research project is to establish the herbicide monitoring system in order to trace the fate of herbicide residues in the climate of Taiwan's paddy field environment for the two crop seasons of rice in Taiwan. The simulation model of this monitoring system is also expected to predict the herbicide dissipation and its fate in paddy field environment based on the data of herbicide concentrations, water management and climatic conditions during crop season. Two herbicides, butachlor and pyrazosulfuron-ethyl, commonly used and wide-spread in paddy field have been examined in the first year. Besides, the herbicide extraction methods with more than 90％ recovery rate of herbicide extraction from paddy soils and paddy water, and three kinds of herbicide analysis methods including bioassay, bioloical marker and HPLC detection techniques have also been established. In paddy field experiment, monitoring system of water balance, application of lysimeter, and herbicide detection coupled with PCPF-1 simulation model are integrated to explore the fate of herbicides. In the second year, photolysis, chemical hydrolysis, and biodegradation of herbicides in paddy soils will be studied in the greenhouse in order to preclude the unexpected rainfall factor. And further experiments, such as herbicide photolysis and microbial degradation of herbicides under the controlled incubator, will be performed in lab simultaneously.
|Appears in Collections:||農藝學系|
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