Because of precipitation serves as one of major approaches of nutrient input into the forest ecosystem,the accurate measurement of its volume and ion concentration is of prime importance in an evaluation of nutrient biogeochemical cycle.The contents of six nutrient elements(Ca,Fe,K,Mg,Mn,Zn) in through-fall,stem-flow and litter water were measured in the larch forest of North Mountain of Hebei Province.The results showed that:(1)Precipitation canopy layers after its hydrochemistry characteristic obviously c...