Effects of Different Management Measures of Cultivation Panax notoginseng Under Forest on Runoff and Sediment Yield and Soil Characteristics on Slope

Abstract

[Objective] Revealing the effects of different management measures on runoff and sediment yield and soil characteristics of [Panax notoginseng (Burkill) F. H. Chen] forest land, can provide a theoretical basis for scientific prevention and control of soil erosion in understory P. notoginseng cultivation. [Methods] The in-situ observation experiment of field runoff plot was used to quantify the sediment yield of natural forest land (CK), forest prepared land (SP), no canopy P. notoginseng forest land (NC), and canopy P. notoginseng forest land (HC) at different slopes (5°,10°,15°) in the rainy season of 2022. to explore the effects of different management measures on the runoff and sediment yield and soil characteristics of P. notoginseng forest land slope. [Results] (1) The total rainfall in Xundian County in 2022 was 1031.70 mm, which belonged to a flat year. The cumulative erosive rainfall outside and inside the forest was 845.40 and 565.60 mm, Canopy interception rates ranged from 9.97% to 67.38%. (2) There were extremely significant (p0.90. With the increase of slope, the loss of sediment increased more. [Conclusion] Forest land preparation and P. notoginseng cultivation led to a significant increase in soil erosion, but the maximum soil loss [34.53 t/(km2·a)] was far lower than the allowable soil loss in karst area of southwest China. It is recommended to cultivation P. notoginseng in gentle slope forest land, and hydraulic erosion can be alleviated by building canopy and improving soil characteristics.

Keywords

• panax notoginseng under the forest
• different management
• runoff and sediment yield
• rainfall characteristics
• soil characteristics