Spectral Identification of Main Control Factors of Soil Phosphorus Loss from Typical Agricultural Land in Taihu Basin

XIONG Junfeng; LIN Chen; MA Ronghua; WU Zhipeng; MIN Min

doi:10.13961/j.cnki.stbctb.2017.02.020

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Spectral Identification of Main Control Factors of Soil Phosphorus Loss from Typical Agricultural Land in Taihu Basin

- Spectral Identification of Main Control Factors of Soil Phosphorus Loss from Typical Agricultural Land in Taihu Basin
- Bulletin of Soiland Water Conservation Vol. 37, Issue 2, Pages: 137-141(2017)
- 作者机构：
  
  1. 南京信息工程大学地理与遥感学院,江苏,南京,210044
  2. 中国科学院南京地理与湖泊研究所中国科学院流域地理学重点实验室,江苏,南京,210008
  3. 南京大学地理与海洋科学学院,江苏,南京,210046
  4. 河南大学黄河文明与可持续发展研究中心,河南,开封,475001
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2017.02.020
  CLC：
- Published：2017
- 稿件说明：
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XIONG Junfeng, LIN Chen, MA Ronghua, et al. Spectral Identification of Main Control Factors of Soil Phosphorus Loss from Typical Agricultural Land in Taihu Basin[J]. Bulletin of Soiland Water Conservation, 2017, 37(2): 137-141.
DOI：

XIONG Junfeng, LIN Chen, MA Ronghua, et al. Spectral Identification of Main Control Factors of Soil Phosphorus Loss from Typical Agricultural Land in Taihu Basin[J]. Bulletin of Soiland Water Conservation, 2017, 37(2): 137-141. DOI： 10.13961/j.cnki.stbctb.2017.02.020.

摘要

[目的

]

通过光谱识别太湖流域农用地面源磷流失的土壤主控因子，为简化面源磷流失强度估算提供依据。[方法

]

通过分析梅梁湾流域耕地和园地中不同面源磷流失强度下的土壤光谱特征，确定影响面源磷流失强度的主要土壤理化性质。[结果

]

耕地面源磷流失强度的特征波段为650~670 nm，1 475 nm和1 680~1 695 nm，土壤主控因子是有机质，二者之间呈正相关；园地面源磷流失强度的特征波段为685~690 nm，710~720 nm，1 110~1 115 nm，1 150~1 155 nm和2 170 nm，主控因子是有机质、水分和Fe

，分别和面源磷流失强度呈负相关、正相关和负相关；有机质对耕地的面源磷流失强度的影响更加显著：耕地面源磷流失强度与光谱指数间的相关系数在1 685 nm处达到0.74，而园地条件下相关系数最高值在715 nm处仅为0.48。[结论

]

耕地面源磷流失主控因子为有机质，园地的主控因子为有机质、水分和Fe

。

Abstract

[Objective] This study was to simplify the estimation of phosphorus loss intensity

through identifying key soil properties affecting non-point source phosphorus loss by spectral analysis

in agricultural land of Taihu Basin. [Methods] To identify the key soil physical and chemical properties affecting non-point source phosphorus loss

the spectral characteristics of soil from arable land and orchard land at Meiliang Bay watershed

Taihu Basin were contrasted. [Results] The characteristic bands of non-point source phosphorus loss were 650~670 nm

1 475 nm and 1 680~1 695 nm in arable land

suggesting that soil organic matter was the main factor controlling non-point source phosphorus loss due to the positive correlation between soil organic matter content and non-point source phosphorus loss intensity. The characteristic bands of non-point source phosphorus loss were 685~690 nm

710~720 nm

1 110~1 115 nm

1 150~1 155 nm and 2 170 nm in orchard land

which suggested that soil organic matter

moisture and Fe2+ were the main controlling factors of non-point source phosphorus loss intensity. Non-point source phosphorus loss intensity was negatively correlated with soil organic matter content and Fe2+

while it was positively correlated with water content. The effect of the source phosphorus loss on the arable land was more significant. The correlation coefficient between the surface source phosphorus loss intensity and the spectral index reached 0.74 at 1 685 nm in arable land. The highest correlation coefficient was only 0.48 at 715 nm in orchard land. [Conclusion] The key soil property in arable land was soil organic matter

and the key soil properties in orchard land was soil organic matter

moisture and Fe2+.

关键词

Keywords

references

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