Objective To find out the depression status of the postartum puerperas and their husbands, to analyse the main risk factors of postpartum depression and discuss the effect of newborns\' parents depression to their parenting behaviour, thereby provide a scientific evidence for the mental health of the parents and the growth and development of the infants.

Analysis on factors related of infants feeding behavior.;

Study of feeding behavior of infants aged 6～12 months in urban area of Beijing.;

Relationship between infant feeding behavior and neuro-psychological development

Differences of foraging behavior between provenances of Pinus massoniana in heterogeneous nutrient environment;

The studies carried out recently years also showed that the tree has a high utilization ratio in natural resources and a high availability in clonal propagation and survival rate with physiological integration,foraging behavior and risk-spreading of death as a result of clonal growth.

A factorial combination pot experiment was designed to study the growth response and foraging behavior of three South China forestation species Pinus massoniana,Schima superba and Liriodendron chinense under heterogenous nutrient envionment and different light conditions.