Observation and verification method for urban tree growth limited habitat

The invention relates to an observation and verification method for an urban tree growth limited habitat. The method comprises the following steps: step 1, selecting a section of test plot on which trees of the same kind grow; 2, observing the growth vigor of the trees in the experimental land, and numbering the observed trees by taking the maximum amplitude of the vertical projection of the water drip of the trees as an observed growth vigor index; step 3, classifying the observed trees by taking the observed tree with the minimum growth index as a standard and taking the difference value 300mm of the growth index as a classification standard, and selecting 1-3 trees from each grade as a verification target; 4, verifying the selected verification target, judging whether the growth environment of the verification target is limited or not, measuring the limited depth of the tree with the limited underground growth environment through a measuring device, and obtaining the corresponding relation between the limi