Studies on Yield Gains of a New Growth Regulator 83008-1 for Mulberry

The mulberry leaves were sprayed by 83008-1 and GA3 of 50ppm 10 and 20 d respectively before picking.The results showed that in the 83008-1 group,leaf weight increased by 10.20%; Leaf number and thickness of palisade tissue and mesophyll increased by 9.78%,4.17% and 9.05% respectively;In the GA3 group,leaf weight increased by 8.86%,and the chlorophyll content and leaf number increased by 4.84% and 4.35% respectively.The resuts indicated that there is close relationship between yield gains and the structural and physiological factors of mulberry leaf.Finally,the mechanism of yield gains was discussed.