【摘要】 在水稻品种、喷药时期及施药浓度方面研究了三唑磷、井冈霉素、吡虫啉等农药对水稻叶片光合产物输出速率的影响。试验应用放射性核素示踪的手段 ,在作物活体条件下 ,采用多探头作物活体养分测量仪采集了不同处理时水稻功能叶片标记光合产物的残留动态数据 ,运用动力学分析的原理和方法 ,建立了隔室分析模型和数学描述公式 ,求解了相应的输出速率常数K值。比较分析结果表明 ,施用供试农药后 ,均不同程度地降低了水稻叶片标记光合产物的输出速率 ,随着施药浓度的增加 ,产生的效应也增大 ;叶片光合速率的降低是造成叶片光合产物输出速率下降的主要原因之一。更多还原

【Abstract】 Impacts of spraying time and application rate of three pesticides, triazophos, jinggangmycin and bisultap, on export rate of photosynthate of rice leaves with 14C were studied. Dynamics data of photosynthate of labeled rice functional leaves with different treatments were recorded using living plant nutrient detection instrument with multi-probes through tracer method of radioactive nuclide. Compartment analysis model and mathematical equations were constructed using principle and method of dynamics analysis, calculating constant (K) of export rate. The result showed that export rate of photosynthate of labeled leaf was reduced after treatments by pesticides. This impact was positiveiy correlated with decline of export rate of photosynthate of the leaf and mainly attributed to the reduction of photosynthesis rate.更多还原