Study on submergence tolerance experiment of some precious species

In order to protect and utilize the precious trees of subtropics,the enduring waterlogging ability of 55 kinds of trees were researched.The result showed that nine species of trees were not hurted after 73 days of waterlogging.15 species of were resumed after withered and 30 kind of species were perished.16 species of trees were died after waterlogging between 48 to 68 days,15 species of trees were died after waterlogging in 47 days.55 species of trees can seperate in five levels of submergence tolerance.According to the evalution of enduring waterlogging ability test,the enduring waterlogging abilities of different species of trees were compositored.55 species of trees were distinct discrepancy.Some species of trees that have stronger enduring waterlogging ability also have stronger enduring drought ability,some trees have the reversed results.