The preliminary study indicates that the nutrient concentration of throughfall has increased obviously in man-made forests of Cunninghamia lanceolata and Pinus massoniana as compared with rainfall in adjacent opening. The relative abundance of nutrient content for precipitation was N>Ca>K>Mg>P. The relative abundance of nutrient content for throughfall was K>N>Ca>Mg>P. The total amount of nutrient input with rainfall in two stands account for 48-53% of total nutrient returns. More amounts of N,K,Mg were tra...