Synthesize effects of different pruning time and gnarls on shoots growing and off-season fructify of Sijimi-mango trees

In order to research the effects of different pruning time and gnarls on shoots growing and flowering formation rate in off-season of Sijimi-mango trees,the test designed 4 different pruning gnarls and 3 different pruning dates. The results were as follows: Analyzed from the gnarls of pruning,the sprouting rate of first shoots of the treatment B pruning up cluster bud up to 96. 7%,the average sprouting number of first shoots up to 2. 2,the average length of first shoots up to 19. 25 cm and average number of leaf on each shoot up to 9. 31 pages; the sprouting rate of second shoots up to83. 3%,the flower formation rate up to 67. 1% in middle august; among all treatments,all indexes of treatment B were the best. Analyzed from the different pruning dates,the highest sprouting rate of second shoots( up to 78. 0%)was obtained on branches which pruning on March 22 and it was more and more lower with the delay of pruning time,the highest rate of off-season flower formation rated up to 68. 0%. In conclusion,the treatment B pruning on April 7was the best combination.