[1]LIANG Jiahui,ZHANG Shaoliang,MU Linlin,et al.Spatial Heterogeneity of Soil Available Phosphorus on Typical Slope in Black Soil of Northeastern China[J].Research of Soil and Water Conservation,2017,24(01):90-95,102.
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Spatial Heterogeneity of Soil Available Phosphorus on Typical Slope in Black Soil of Northeastern China
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 01
Page number:
90-95,102
Column:
Public date:
2017-02-28
- Title:
- Spatial Heterogeneity of Soil Available Phosphorus on Typical Slope in Black Soil of Northeastern China
- CLC:
- S158
- DOI:
- -
- Abstract:
- Soil available phosphorus (AP) is the key factor used for assessment of phosphorus (P) availability and environmental risk. Understanding the spatial variability was helpful to improve the precision fertilization, and reduce and control environmental pollution. AP (Olsen-P) in 0—60 cm layers from four sample transects was measured, and the AP dynamics was summarized systematically in profiles and lengthways. The results indicated that AP content ranged from 0.57 mg/kg to 50.01 mg/kg in 0—60 cm soil depth. AP in 0—20 cm soil depth vaired from 10 mg/kg to 40 mg/kg, and the soil productivity was at sufficiency level. In vertical directions, AP decreased from 0—20 cm to 50—60 cm soil layers. Fertilization decreased the variation in surface soil layer (0—20 cm), and soil loss and sediments increased the variation of deep soil layer (20—50 cm). In horizontal direction, AP decreased from summit to down slope, soil loss and deposition decreased AP on both back slope and bottom.
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