Effects of Prescribed Fire on Meadow Soil Chemical Properties in Nanwenghe Nature Reserve

The Nanwenghe Nature Reserve is located in the Daxing’anling forest region, which abundant meadow resource prone to fire season every year. In this paper, change soil chemical properties of burned stands was emphasized. results showed that: (1) Soil organic matter (SOM) concentration an extremely significant difference from that control (p < 0.01). Alkali-hydrolysable N, available K and total N were significantly lower than those 0.05). (2) Total P, K, pH P not different concentrations > (3) Available no June September. values increased with a variance 8%, July, August September June. SOM obtained significantly, compared decreasing trend for all conditions.