应用同位素示踪法研究氮肥增效剂眯基硫脲在水稻(早稻和中稻)和上壤中的残留动态。试验结果表明,早稻和中稻的根系在整个生育期中都能从土壤中不断吸收脒基硫脲,并运转至稻株各部。早稻“广鲜九号”不同生育期的残留量,按每克干重的残留量计,以苗期最高,孕穗期次之,成熟期再次,再生稻最低。 Isotope tracer method was used to study the residue dynamics of squalene thiosemicarbazide, a nitrogen fertilizer synergist, in rice (early rice and middle rice) and soil. The results showed that the root system of early rice and middle rice continuously absorbed guanylthiourea from the soil during the whole growth period and ran to all the rice plants. Residues at different growth stages of early rice “GuangXian 9 ” were the highest in seedling stage, the second in booting stage, again in mature stage, and the lowest in regenerated rice.