锶－89引入方式对其在水稻植株中积累的影响

EFFECT OF INTRODUCTION METHOD ON ACCUMULATION OF 89Sr IN THE RICEPLANT

Theisotope tracer technique was used to explore the effect of introduction method on accumulatlon of radioactive strontium in the rice plant. the results showed thatconcentration of 89Sr decreased witn time in the rice plant,paddy water and paddy soil for spray and fall treatments.It showes an individual exponential function .For irrigation treat-ment,change of concentration of 89Sr in the rice plant ,paddy water and paddy soil was more complicated. The relationship of concentrafion and time was deseribed as multinomial expo-nential function .The concentration distribution of 89Sr in the paddy soil was identical amongthtee treatments and showed an indivldul exponential dlclining with depth. CF value of 89Srwas CF water>CFsofl for each treatment.