The leaves of evergreen broadleaved tree species Ilex rotunda, Machilus thunbergii, Pittosporum tobira and deciduous broadleaved tree species Celtis sinensis, Ginkgo biloba, Cornus florida were collected from the time of full leaf expansion to the end of growing season.

The major factors causing deciduous fruits to be dormant is low temperature.

To summarize several aspects of research on nitrogen nutrition in deciduous fruit tree, including nitrogen s effect on output and quality,nitrogen cycling,nitrogen diagnosis and precision application technology.

The functioning mechanism,absorption,transference,distribution,effective period and perennial effect ,as well as application of paclobutrazol in deciduous fruit trees were summarized.

Gibberellin had many purposes for deciduous fruit crops,which are inducing the seedless fruit,raising fruit set rate,improving quality of fruit,preventing flowers and fruits dropping,promoting the fruit mature,postponing florescence period,increasing fruit storage ability,breaking dormant.

To satisfy Chilling requirement (CR) of deciduous fruit crops is an important guarantee for deciducxn fruit crops to sprout, blossom and bearing normally.

Organ regeneration of deciduous fruit trees in vitro:present status and topics to be researched;

Dormancy is important for the growth and development of deciduous fruit trees .

The changes of respiration intensity and pathway of buds of deciduous fruit trees during dormant perial were studied The factors affelting respiration were also studied in order to regulate the process of bud dormancy by controlling respiration.