论文部分内容阅读
~(14)C-多菌灵用硫脲法标记合成,产率51%,含量99%,产品达到放化纯。~(14)C-多菌灵示踪研究表明:水稻叶片和根系均能吸收,并运转积累于植株各部分。~(14)C-多菌灵及其代谢产物在水稻上的残留量因施药时期、施药次数,施药量,早晚稻品种、露天或防雨等条件不同而不同。水稻分蘖期、破肚期、齐穗期先后施药三次,糙米中的残留量,早稻为1.365ppm,晚稻为0.610ppm。~(14)C-多菌灵及其代谢产物在土壤中的残留量随施药时期的推迟和施药次数,施药量的增加而增加,但大部分积累于0-5厘米的土层中。
~ (14) C-carbendazim with thiourea labeling synthesis, the yield of 51%, the content of 99%, the product reached radiochemical purity. ~ (14) C-carbendazim tracing studies show that: rice leaves and roots can absorb, and the operation accumulated in various parts of the plant. ~ (14) C-carbendazim and its metabolites in rice residues due to the application period, the number of applications, the amount of application, early and late rice varieties, open air or rain and other conditions vary. Rice tillering stage, break the belly phase, full heading three times, brown rice residues, early rice is 1.365ppm, late rice is 0.610ppm. ~ (14) The residues of carbendazim and its metabolites in soil increased with the delay of application and the times of application and the application of pesticides, but most of the residues accumulated in 0-5 cm layer in.