The contents of five nutrient elements(K

Ca

Mg

Mn

Fe) in through-fall

stem-flow were measured in the Pinus koraiensis virgin forest of Xiaoxing'an Mountains

and according to the allotment of water amount

net input-quantity of each element in the forest was calculated

the results showed that:(1)The contents of nutrient elements in precipitation

through-fall

and stem-flow were all had the decreased order of stem-flow>through-fall>precipitation except of Fe.The average contents of different nutrient elements were in the decreased tendency of Ca>K>Mg>Mn>Fe.(2)The biggest coefficient of variation(Cv) in precipitation was 1.514 for K element and the least one was 0.827 for Ca element.The biggest Cv of nutrient elements in through-fall

stem-flow of the Pinus koraiensis virgin forest were Mn

Mg

and Fe

and the least were Ca

Mn.The average contents of the five nutrient elements' Cv in precipitation

through-fall

and stem-flow had the decreased tendency of precipitation > through-fall > stem-flow.(3)The net input-quantity of nutrient elements in the Pinus koraiensis virgin forest was as follows:K>Ca>Mg>Mn>Fe

furthermore

the net input-quantity of Fe in Pinus koraiensis virgin forest was negative.