By taking the economic fruit forest in Xingmu watershed of Jilin Province as the study object

the impacts of different fertilization pattern on soil physical and chemical properties were investigated through single component application and combined fertilizer application. Results indicated that: (1) Fertilizing treatments had some impacts on the increased amount of soil organic matter in 0-20 cm soil layer. The treatments

in order of the increased amount of organic matter

were organic and inorganic fertilizer and straw field(NPKOM)

organic fertilizer and straw returning(OM)

single-organic fertilizer(M)

straw returning(O) and control(CK). Compared with the control treatment

the other treatments increased soil organic matter contents of 45%

37%

26% and 10%

respectively. (2) All the fertilizing treatments could improve soil permeability effectively

increase soil porosity and decrease soil bulk density. Straw returning was found to be the most effective treatment than the others(p=0.043). (3) Dynamic changes of total N

total P and total K not only had relations to the input and output amount of each element

but also had close relations to fertilizing methods and the background values of the elements. The variations of element contents became greater with the increasing background values. The combined fertilizer application had more significant effect than the single component application on the increases of total N and total P contents. This was mainly because of the increased nutrients input. The contents of total N

total P and total K showed the same change trend as soil organic matter content. The total K content was reduced differently among all the treatments.