Study on Effect of Pesticides on Rice Leaf Photosynthate Export Rate with Tracer Kinetics  

作　　者：LUO Shi-shi, WANG Ze-gang, FENG Xu-meng, XU Jun-feng, DING Hai-dong,WU Jin-cai, GE Cai-lin and MA Fei( Agricultural College , Yangzhou University, Yangzhou 225009 , P. R . China ) 

出　　处：《Agricultural Sciences in China》2002年第7期765-769,共5页中国农业科学（英文版）

基　　金：supported by the National Science Foundation of China(30070122).

摘　　要：Impacts of three pesticides, triazophos, jingganmycin and bisultap, on the export rate of pho-tosynthate of rice leaf were studied with 14C for rice varieties, spraying time and application rate. Dynamics data of photosynthate of labeled rice functional leaves of different treatments were recorded with 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 kinetics analysis, calculating constant (K) of export rate. The result showed that the export rate of photosynthate of labeled leaf reduced after pesticide treatments. The reduction of the export rate was positively related with the pesticide application rates and mainly attributed to decrease of photosynthetic rate.Impacts of three pesticides, triazophos, jingganmycin and bisultap, on the export rate of pho-tosynthate of rice leaf were studied with 14C for rice varieties, spraying time and application rate. Dynamics data of photosynthate of labeled rice functional leaves of different treatments were recorded with 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 kinetics analysis, calculating constant (K) of export rate. The result showed that the export rate of photosynthate of labeled leaf reduced after pesticide treatments. The reduction of the export rate was positively related with the pesticide application rates and mainly attributed to decrease of photosynthetic rate.

关 键 词：PESTICIDE Rice PHOTOSYNTHATE Labeled isotope 

分 类 号：S482.3[农业科学—农药学]