The effects of 3 kinds of water - retaining agents applied with different methods and at different doses on the growth, yield and quality of tobacco were studied through field tests. The results showed that all the 3 kinds of water - retaining agents could promote the tobacco growth, obviously enhance the yield of tobacco leaf, and improve the quality of tobacco leaf, and they also were propitious to retaining soil fertility. Applying 60 kg/hm2 water - retaining agent had the most remarkable yield - increasing effect, but applying 30-45 kg/hm2 water - retaining agent was in favor of improving tobacco leaf quality. The nutrient - cup method had the best effect among the 3 different application processes. The water - retaining agent which was produced by Institute of Resources and Nutrition, Beijing Academy of Agricultural Sciences had the best yield - increasing effect among 3 kinds of water - retaining agents.%通过田间试验研究了采用不同方法和不同剂量施用3种不同保水剂对烟草生长、产量和品质的影响.试验结果表明:3个品种的保水剂均能促进烟株生长,显著地提高烟叶产量,改善烟叶品质,并有利于保持土壤肥力.以施用60 kg/hm2保水剂的增产效果最显著,但施用30～45 kg/hm2的保水剂有利于改善烟叶的品质.在保水剂的3种不同施用方法中,以营养杯法的效果最佳.在供试的3个保水剂品种中,以北京市农科院资源与营养研究所生产的保水剂增产效果最好.
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