Water erosion and soil nitrogen at the water-level-fluctuation zone of Qiandao Lake

YU Minfen; FANG Jia; HE Yongqing; LIN Taiben; ZHENG Bingsong; WANG Qiang

doi:10.11833/j.issn.2095-0756.2013.06.002

Volume 30 Issue 6

Nov. 2013

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YU Minfen, FANG Jia, HE Yongqing, LIN Taiben, ZHENG Bingsong, WANG Qiang. Water erosion and soil nitrogen at the water-level-fluctuation zone of Qiandao Lake[J]. Journal of Zhejiang A&F University, 2013, 30(6): 805-813. doi: 10.11833/j.issn.2095-0756.2013.06.002

Citation:

YU Minfen, FANG Jia, HE Yongqing, LIN Taiben, ZHENG Bingsong, WANG Qiang. Water erosion and soil nitrogen at the water-level-fluctuation zone of Qiandao Lake[J]. Journal of Zhejiang A&F University, 2013, 30(6): 805-813. doi: 10.11833/j.issn.2095-0756.2013.06.002

Water erosion and soil nitrogen at the water-level-fluctuation zone of Qiandao Lake

doi: 10.11833/j.issn.2095-0756.2013.06.002

1.
The Nurturing Station for the State Key Laboratory of Subtropical Silviculture，Zhejiang A & F University，Lin’an 311300，Zhejiang，China;
2.
Forest Resource Monitoring Center of Zhejiang Province，Hangzhou 310020，Zhejiang，China;
3.
Ningbo Institute of Technology，Zhejiang University，Ningbo 315100，Zhejiang，China

More Information

Corresponding author: ZHENG Bingsong
Received Date: 2012-12-24
Rev Recd Date: 2013-01-15
Publish Date: 2013-12-20

Abstract

To analyze the effects of water erosion on soil nitrogen at the water-level-fluctuation zone of Qiandao Lake，Zhejiang Province，13 representative soil bands and 26 sample transects were set up to determine based on the temporal and spatial characteristics of the water level and differences in the soil matrix. Soil total nitrogen，hydrolytic nitrogen, and nitrate nitrogen for depth of 0-30 cm，30-50 cm，and 50-75 cm in the water-level-fluctuation zone and in a woodland were analyzed respectively using the national forestry industry standards （GB 7173-1987），（LY/T 1229-1999），and （LY/T 1230-1999）. Each soil sample was measured three times, and resulted the average value. Results showed that soil total N and hydrolytic N for the water-level-fluctuation zone were decreased than those for the woodland，whereas nitrate N for the water-level-fluctuation zone was increased than that for the woodland. The numerical least square method models for the water-level-fluctuation zone to the lake showed losses of total N 801 277.54 t and hydrolysis N 109 465.28 t with sedimentation of nitrate N from the lake to the water-level-fluctuation zone of 913.39 t. The BP neural network numerical models were soil total N 712 593.85 t，hydrolytic N 97 823.34 t，and nitrate N 849.30 t. Partial differential diffusion equation numerical models were soil total N 921 058.79 t，hydrolytic N 123 125.13 t，and nitrate N 1 028.35 t. The least square method models better explained the effects of water erosion at the water-level-fluctuation zone of Qiandao Lake，and protection and management of the water-level-fluctuation zone need to be strengthened.［Ch，1 fig. 1 tab. 33 ref.］
- soil science,
- water-level-fluctuation zone,
- water erosion,
- nitrogen,
- Qiandao Lake

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Water erosion and soil nitrogen at the water-level-fluctuation zone of Qiandao Lake

1. The Nurturing Station for the State Key Laboratory of Subtropical Silviculture，Zhejiang A & F University，Lin’an 311300，Zhejiang，China;

2. Forest Resource Monitoring Center of Zhejiang Province，Hangzhou 310020，Zhejiang，China;

3. Ningbo Institute of Technology，Zhejiang University，Ningbo 315100，Zhejiang，China

Corresponding author: ZHENG Bingsong

Received Date: 2012-12-24

Rev Recd Date: 2013-01-15

Publish Date: 2013-12-20

Key words:

Abstract: To analyze the effects of water erosion on soil nitrogen at the water-level-fluctuation zone of Qiandao Lake，Zhejiang Province，13 representative soil bands and 26 sample transects were set up to determine based on the temporal and spatial characteristics of the water level and differences in the soil matrix. Soil total nitrogen，hydrolytic nitrogen, and nitrate nitrogen for depth of 0-30 cm，30-50 cm，and 50-75 cm in the water-level-fluctuation zone and in a woodland were analyzed respectively using the national forestry industry standards （GB 7173-1987），（LY/T 1229-1999），and （LY/T 1230-1999）. Each soil sample was measured three times, and resulted the average value. Results showed that soil total N and hydrolytic N for the water-level-fluctuation zone were decreased than those for the woodland，whereas nitrate N for the water-level-fluctuation zone was increased than that for the woodland. The numerical least square method models for the water-level-fluctuation zone to the lake showed losses of total N 801 277.54 t and hydrolysis N 109 465.28 t with sedimentation of nitrate N from the lake to the water-level-fluctuation zone of 913.39 t. The BP neural network numerical models were soil total N 712 593.85 t，hydrolytic N 97 823.34 t，and nitrate N 849.30 t. Partial differential diffusion equation numerical models were soil total N 921 058.79 t，hydrolytic N 123 125.13 t，and nitrate N 1 028.35 t. The least square method models better explained the effects of water erosion at the water-level-fluctuation zone of Qiandao Lake，and protection and management of the water-level-fluctuation zone need to be strengthened.［Ch，1 fig. 1 tab. 33 ref.］

Water erosion and soil nitrogen at the water-level-fluctuation zone of Qiandao Lake

doi: 10.11833/j.issn.2095-0756.2013.06.002

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

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