控蘖剂调控水稻分蘖发生的效果  

Effects of Tiller Inhibitors on Regulation of Rice Tillering

作　　者：王绍华[1] 揭水通[1] 丁艳锋[1] 王强盛[1] 

机构地区：[1]南京农业大学农业部作物生长调控重点开放实验室,江苏南京210095

出　　处：《江苏农业学报》2002年第1期29-32,共4页Jiangsu Journal of Agricultural Sciences

基　　金：江苏省农业新技术重大攻关项目 (BG985 0 3 8)

摘　　要：以 5种水稻控蘖剂为供试材料 ,研究结果表明 :5种控蘖剂均能有效抑制水稻分蘖发生 ,其中控蘖剂B抑蘖能力最强 ;施药时期影响控蘖剂的抑蘖效果 ,施药越早抑蘖效果越强 ;控蘖剂靶标蘖位与施药时叶龄关系密切 ,主茎 5叶期施药 ,受抑制蘖位主要为Ⅳ和V ,主茎 9叶期施药 ,受抑制蘖位主要为Ⅶ和Ⅷ ;无效分蘖期喷施控蘖剂能减少大田无效分蘖的发生 ,降低群体的高峰苗数 ,增加氮素吸收量 ,提高氮素利用效率。The effects of 5 kinds of tiller inhibitors on the tillering of rice variety'Wuyunjing 7'were studied.All the tiller inhibitors used could effectively regulate and control rice tillering,with inhibitor B performing the best function.The time for spraying inhibitors affected the results of inhibition,and the earlier the spray time,the better the effects.The target tiller position which inhibitors affected was closely related to the leaf age.If sprayed at the 5 leaf stage,the inhibited tiller positions were mainly Ⅳ and Ⅴ;if sprayed at the 9 leaf stage,the inhibited tiller positions were mainly Ⅶ and Ⅷ.At the ineffective tillering stage,spraying inhibitors could obviously reduce the number of ineffective tiller and decrease the peak seedling number of the population,thus increasing the N uptake,enhancing the efficiency of N utilization,the productive tiller percentage and rice yield.

关 键 词：水稻 控蘖剂 分蘖发生 调控效果 成穗率 氮素利用率 产量 

分 类 号：S511.062[农业科学—作物学] S482.8