近年来,随着保护地蔬菜生产的发展,植物生长调节剂在蔬菜上的应用越来越广泛,并且发挥了较好的增产增收作用。根据它们的作用方式,植物生长调节剂大致可分两类:生长促进剂和生长抑制剂(包括生长延缓剂)。目前蔬菜生产上应用较多的有:萘乙酸、2.4-D、防落素、丰产剂2号、矮壮素、B_9、多效唑、赤霉素、乙烯利等。每种植物生长调节剂都有其特定的作用、使用浓度、施用部位和方法。一般来讲,生长激素类能刺激植物细胞膨大,促进器官的伸长,增加叶绿素的含量;生长抑制剂可使茎矮叶密,防止徒长,促进叶绿素的形成,提高植物的抗病性、抗寒性。因此,在使用前,一是要对其作用有充分的了解,明确使用浓度及施用部位和方法。植物生长调节剂的剂量一般随温度的变化而变化,低温时浓度可大 In recent years, with the development of vegetable production in protected areas, the application of plant growth regulators in vegetables has become more and more widespread, and has played a good role of increasing yield and increasing income. According to their mode of action, plant growth regulators fall into two broad categories: growth promoters and growth inhibitors (including growth retardants). At present, the production of vegetables are more: naphthalene acetic acid, 2.4-D, anti-down factors, high yield on the 2nd, CCC, B_9, paclobutrazol, gibberellin, ethephon and so on. Each plant growth regulator has its specific effect, use concentration, application site and method. In general, growth hormone can stimulate the expansion of plant cells, promote organ growth, increase the content of chlorophyll; growth inhibitors can make the stem short leaves, prevent leggy, promote the formation of chlorophyll, improve plant disease resistance, anti Cold sex. Therefore, before use, it is necessary to have a full understanding of its role, and clearly use the concentration and application sites and methods. The dosage of plant growth regulators generally varies with temperature and can be very high at low temperatures