【摘要】 本文报道以杀雄剂二号不同处理杀雄,稻株含砷量和杀雄效果的变化。试验结果表明:施药量与稻株含砷量呈显著的正相关关系,与杀雄率的关系符合逻辑斯蒂曲线(LogistcCurve)。红阳矮二号亩施药量在26克左右时,茎穗含砷量在9ppm以上,杀雄率可达90％左右。水稻经杀雄二号喷洒后,砷被吸收运转很快,喷施3小时后淋雨,稻株含砷量已接近杀雄要求,其杀雄率、闭颖率和包颈率与不施药对照和喷后1小时淋雨差异非常显著,而与施药不淋雨对照差异不显著,可初步视为稻株吸收药剂的最小有效时间指标。 化学杀雄是水稻杂种优势利用的有效途径之一,以杀雄剂二号杀雄配制杂交种,已被进行化杀工作的单位所普通采用,但制种的效果不够稳定。本文总结作者于1983年所进行的杀雄剂二号不同处理与水稻含砷量和杀雄效果关系的试验,目的在于为提高水稻化学杀雄制种技术提供理论与实践依据。更多还原

【Abstract】 This paper reports the variation of As contents and effectiveness inducing male-sterility of rice plant after spraying Male-Gametocide No.2 (CH3AsO3Na2) with different treatments. The results showed that a significant positive linear correlation was founded between the dosages of Male-Oametocide No.2 and the As contents of rice plants, but the relationship between the dosages and the degrees of male-sterility fits with the Logistic Gurve closely. The As content of rice stem and panicle amounted to more than 9 ppm and the percentage of male-sterility approached to 90% As the rice variety Hong Yang Ai was treated with Male-Gametocide No. 2. in the dosage of 26 g/mu. When the rice plant was sprayed with the Male-Gametocide No.2. (CH3AsO3H2) was absorbed and translocated to the panicle rapidly.This experiment showed that the As contents of the rice plants approached the contents induced male-sterility effectively in 3 hours after spraying, and therefore,3 hours may be considered tentatively as a minimum time-index for the rice plant absorbing the CH3A8O3H2 in order to Induce male-sterility.更多还原