Abstract:

In order to know the effect of the forest of Pinus elliottii under highly intensive management on environment, a consecutive 6-year systematic research of locating monitoring was conducted by taking the newly-built sapling forest of Pinus elliottii as the target and by setting up the field of runoff.The monitoring results showed 6435.3 mm of precipitation during monito ring period, 1611.241 t/hm² of runoff, 2784.4777 kg/hm² of silt loss, 131kg/hm² of the main nutrients as N、P、K, 3.16 %of the runoff coefficient, by building forest of Pinus elliottii in the hilly area of Anhui Province, carrying out large blocked, site preparation(80cm ×80cm ×50cm) and intensive management in order not to cause heavy soil and water loss, the modulus of soil erosion in the year of afforestation was 195.59 t/hm², belonging to the type of non-obvious erosion, thus high-grade site preparation and intensive management can be advocated in this area; May ~ August was the intensive precipitation period, related afforestation activities should be avoided; the soil and water loss was in a relationship of power function with precipitation, with the forest grow th and the restoration of vegetation, the runoff amount gradually decreased, and the silt loss considerably reduced as well.

Key words: Pinus elliottii, Sapling forest land, Soil and water loss, Runoff amount, Silt loss, Anhui