[1]WANG Tian,HUANG Zhilin,ZENG Lixiong,et al.Assessment on the Comprehensive Control of Soil Erosion and Soil Nutrient Losses in the Reforestation Patterns along the Three Gorges Reservoir Area——A Case Study of Lanlingxi Watershed[J].Research of Soil and Water Conservation,2018,25(05):83-88.
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Assessment on the Comprehensive Control of Soil Erosion and Soil Nutrient Losses in the Reforestation Patterns along the Three Gorges Reservoir Area——A Case Study of Lanlingxi Watershed
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 05
Page number:
83-88
Column:
Public date:
2018-09-06
- Title:
- Assessment on the Comprehensive Control of Soil Erosion and Soil Nutrient Losses in the Reforestation Patterns along the Three Gorges Reservoir Area——A Case Study of Lanlingxi Watershed
- Keywords:
- returning farmland to forest; soil erosion; nutrient loss
- CLC:
- S153
- DOI:
- -
- Abstract:
- The soil erosion and nitrogen and phosphorus loss characteristics on typical reforestation patterns in Lanlingxi watershed along the Three Gorges Reservoir Area was studied by runoff plot experiment. Soil erosion and nutrient loss from May to September 2016 of typical reforestation patterns including garden plot (tea garden and citrus garden), forest land (Chinese chestnut) and the Original farmland were monitored and analyzed. The results showed that:(1) after the Returning Farmland to Forest Project, the quantity of soil erosion and nutrient losses (nitrogen and phosphorus, the sum of them in sediment and runoff) decreased obviously. Compared with the original farmland, the surface runoff losses in the Chinese chestnut forest, citrus garden and tea garden decreased by 41.95%, 22.78%, and 6.11%, respectively, the soil erosion decreased by 87.91%, 75.26% and 58.94%, respectively, the decrease of total nitrogen loss was 52.42%, 44.08% and 31.26%, respectively, and the decrease of total phosphorus loss was 72.87%, 70.45% and 43.24%, respectively; (2) compared with farmland, available nitrogen loss decreased in reforestation patterns, total nitrate nitrogen (NO3--N) loss ranked in the order:farmland 332.09 g/hm2 > tea graden 243.42 g/hm2 > Chinese chestnut forest 124.76 g/hm2 > citrus graden 123.18 g/hm2, and for ammonium nitrogen(NH4+-N) loss order was farmland 184.22 g/hm2 > tea graden 132.18 g/hm2 > citrus graden 117.62 g/hm2 > Chinese chestnut forest91.42 g/hm2; the proportion of nitrate nitrogen loss to total nitrogen loss is higher than that of ammonium nitrogen; (3) the main route of total nitrogen and total phosphorus losses were through sediment. The losses of NO3--N and NH4+ -N were mainly through runoff. The main pollutant in the watershed was total nitrogen of sediment.
- References:
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1900-01-01