浙江省萧山棉麻试验场及安阳市农林局来函询问萘乙酸使用方法。关于萘乙酸使用方法,本刊第一期“利用植物生长素防止棉花蕾铃脱落”一文已有详细说明。在开花期间,用萘乙酸共喷射4至5次,浓度为0.001%或0.002%(即一克萘乙酸,直接溶于200斤或100斤清水中),每隔10天喷一次,下午四、五点钟以后或在清晨棉花未开放之前喷在花蕾及铃上,全部喷湿,第一次先从下部果枝开始,以后逐渐 Zhejiang Xiaoshan Cotton Ma Zongchang Anyang City Bureau of Agriculture and Forestry Bureau letter asked NAA use. On the use of naphthalene acetic acid, the first issue of “use of auxin to prevent cotton buds fall off,” a text has been described in detail. During flowering, a total of four to five injections of naphthalene acetic acid at a concentration of 0.001% or 0.002% (ie, one gram of naphthaleneacetic acid dissolved directly in 200 or 100 jin of clear water) are sprayed once every 10 days, After five o’clock or in the morning before the cotton is not open on the spray buds and bells, all wet, the first from the bottom of the first fruiting branch, and gradually after