Effect of Plant Growth Regulators on Yield and Quality of Oryza sativa
3 commonly used growth regulators,i.e.,80% gibberellic acid SG (GA),4% furfurylaminopurine AS (FA)and 0.4% brassinolide·gibberellic acid AS (BG),were evaluated for their effects on yield and quality of Oryza sativaat Rongcheng,Fuqing.The results showed that all 3 regulators could improve the yield and quality of the rice when GA was diluted 2 500 to 3 000-fold,FA 600 to 1 000-fold,or BG 800 to 1 200-fold for the application. Within these ranges of concentrations it was found safe and cost effective.The best time for the application was determined to be during thetillering and booting stage of the rice plants.