Soil nutrient and phosphatase activity under secondary forest in Badaling mountain
BAI Cui-Xia-；Geng-Yu-Qing-；Tu-Xin-Xiao-；Lu-Chao-Wei-；Wang-Shu-Sen-；Liang-Wei
College of Soil and Water Conservation in Beijing Forestry University, Key Lab of Soil and Water Conservation and Desertification Combating, Ministry of Education, 100083, Beijing, China
Abstract：In order to understand the soil fertility under secondary forest in Badaling mountain, Beijing, soil nutrient and its phosphatase activity under three forests of Betula dahurica, Tilia mandshurica, Juglans mandshurica were studied. The result showed that there was obvious effects of the surface in soil nutrient content. Total phosphorus content ranged from 0.39g.kg -1 to 0.66g.kg -1 , phosphorus deficiency may be happened; Acid phosphatase activity was higher than alkaline in every soil horizon under three forests. With increase of soil depth, phosphatase activity was lower obviously. The results also indicated that soil nutrient and phosphatase activity in rhizosphere are higher than those in non-rhizosphere, the ratio of R/NR was between 1.02 and 5.25; Correlations were analyzed by SPSS software, and soil phosphatase activity was related positively to soil pH, organic matter, total nitrogen, available nitrogen, available phosphorus and available potassium. Soil phosphatase activity was considered an indicator for soil fertility evaluations.
2006, Vol. 4 
