植物生长调节剂（plant growth regulator）.docVIP

植物生长调节剂（plant growth regulator） The seventh chapter, plant growth regulator Known plant hormones include auxin, gibberellin, cytokinin, abscisic acid, and ethylene Section 1 concepts and classifications of plant growth regulators I. concept It is modeled on the chemical structure of synthetic plant hormones with plant hormone active substances, some chemical structures and properties with different plant hormones but have a physiological effect and the effect of similar characteristics, trace fertilizer reached significant regulation on the growth and development of plants. Two, according to its physiological effect classification 1. auxin: 2. gibberellin: 3. cytokinin: 4. vinyl: 5. abscisic acid: Plant growth inhibitors: Second kinds of plant growth regulators commonly used varieties Ethephon (a tried, beneficial, auxin, corn) 1. PH 3, stable, PH 4, gradually release ethylene, temperature, PH rise, decomposition fast 2. low toxicity, LD50 = 4229 mg/kg 3., easy to be absorbed by plants, the general plant cell fluid PH4, decomposition, release ethylene 4., its physiological function is very extensive, almost participate in every physiological process of plants, the prominent functions are: promoting fruit maturation, organ abscission, dwarfing plants, changing the ratio of male and female flowers, inducing male sterility 5. may cause plant growth on the side 6. can not mix with alkaline substances, strong acid, corrosion of metal, skin, and clothing 7., strong physiological activity, can not be used indiscriminately 8. commonly used in cotton, tomato, watermelon, oranges, bananas, coffee, fruit ripening, increase the rubber yield, change the ratio of male and female flowers, such as: (1) rubber is mainly used in low age seedlings, and the need to update the rubber plantation on the secant green tree 2 cm under the skin, 40% water 4-10 times (according to the age, length, cycle length, secant) active period of 1.5-3 months (2) tomato: 2000-4000PPM, after harvest, fr