作物的生长发育除需要水分和各类营养物质外还需要对生长发育起特殊作用的微量活性物质－植物激素，这是植物本身合成的激素。人工合成的激素则称为植物生长调节剂。应用植物生长调节剂调节和控制作物的生理功能、生化代谢过程及生长发育进程称之为化控技术。把化控技术与各项 Crop growth and development in addition to the need for water and various nutrients also need to play a special role in the growth and development of trace active substances - plant hormones, which is the plant’s own synthesis of hormones. Synthetic hormones are called plant growth regulators. Application of plant growth regulators to regulate and control the physiological functions of crops, biochemical metabolic processes and growth and development process called chemical control technology. The chemical control technology and various