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[1]GONG Shunqing,CHEN Qibo,HUANG Xinhui,et al.Prescribed Burning Effects on Slope Runoff and Soil Loss in a Pinus yunnanensis Forest of Yunnan[J].Research of Soil and Water Conservation,2022,29(03):18-24.

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Prescribed Burning Effects on Slope Runoff and Soil Loss in a Pinus yunnanensis Forest of Yunnan

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 03 Page number: 18-24 Column: Public date: 2022-04-20

Title:: Prescribed Burning Effects on Slope Runoff and Soil Loss in a Pinus yunnanensis Forest of Yunnan

Author(s):: GONG Shunqing¹, CHEN Qibo^1,2, HUANG Xinhui^1,2, YANG Jianguang³, LI Jianqiang^1,2, QIAN Jing⁴; (1.School of Ecology and Environment, Southwest Forestry University, 650224 Kunming, China; 2.Research Institute of Rocky Desertification, Southwest Forestry University, Kunming 650224, China; 3.Xinping Forestry and Grassland Bureau, Xinping, Yunnan 653499, China; 4.Xinping Meteorological Bureau, Xinping, Yunnan 653499, China)

Keywords:: prescribed burning; Pinus yunnanensis forests; runoff; sediment yield

CLC:: 157.1

DOI:: -

Abstract:: In order to explore effects of prescribed burning on runoff and soil loss on slopes of Pinus yunnanensis forests, burned and unburned runoff plots were set up to observe runoff and sediment yield of Pinus yunnanensis forests on Zhaobi Mountain of Xinping County, Yunnan Province in 2019. Relationships among rainfall, runoff and sediment were analyzed. The results showed that:(1)rainfall in 2019 was 568.6 mm, which was only 60.5% of the average annual rainfall of 939.79 mm; rainfall mainly occurred in rainy seasons from May to October, accounting for 73.8% of the total annual rainfall; there were 51 rainfall events in this season, of which 28 were runoff producing, accounting for 93.7% of the total rainy-season rainfalls;(2)continuous prescribed burning for more than 20 years enhanced converting rainfall into slope runoff, and under light rains burning produced the most amount of soil loss;(3)runoff of burned and unburned plots was significantly correlated with rainfall by power function on burned plots and polynomial function on unburned plots, respectively;(4)sediment on both burned and unburned plots was significantly related to rainfall and runoff by power function. These results showed that many years of burning had changed the hydrological characteristics of forestland, improved the transforming ability from rainfall to slope runoff, and increased the sediment carrying capacity of runoff, so that the prescribed burning land had more runoff and sediment than unburned land.

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Last Update: 2022-04-20