Soil enzyme activity and nutrient characteristics of Camellia oleifera forest at different plantation ages

Based on the determination of soil nutrient content and enzyme activity of Jiangxi Camellia oleifera forest at different plantation ages, soil nutrients, enzyme activity features and their relationship were studied. The results showed that: among the test stands, C.oleifera forest soil nutrient content decreased gradually, for catalase, peroxidase and invertase activity ,Summer soil enzyme activity was higher than that in autumn. Along with the C.oleifera forest age increasing, soil nutrient content and soil enzyme activity changed regularly.0-20 cm soil layer, among the 6 kinds of different plantation ages of C.oleifera and control stand, The summer organic matter contents of G50yr were the highest for 3.89%;The autumm organic matter contents of D10yr were the highest for 2.25%. Both the summer and autumn catalase activity of G50yr were the highest, respectively for 2.12, 1.61 mLg-1; the activity of summer peroxidase and invertase activity of C6yr were both the highest among the 6 kinds of different ages, respectively for 2.45 Ug-1,3.43 mLg-1. 20-40 cm soil layer, among the 6 kinds of different plantation ages of C.oleifera and control stand, The summer and autumm organic matter content of G50yr C.oleifera forest were both the highest, respectively for 1.97% and 1.31%, the summer and autumn catalase activity of the G50yr were both the highest , respectively for 1.50, 0.95 mLg-1. the autumn peroxidase and invertase activity of C6yr were both the highest, respectively for 2.22, 1.33 mLg-1. The correlation analysis showed that soil nutrient factors and soil enzyme activity in each layer were significant or extremely significant correlated, Catalase, peroxidase, invertase are the good biological reference indexs to evaluate soil quality and soil fertility.