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[1]QIU Ye,QU Zhixu,HAN Yuguo,et al.Effect of Fertilizer Types on Phosphorus Loss on Slope Under Simulated Rainfall[J].Research of Soil and Water Conservation,2023,30(05):106-112.[doi:10.13869/j.cnki.rswc.2023.05.016.]

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Effect of Fertilizer Types on Phosphorus Loss on Slope Under Simulated Rainfall

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 05 Page number: 106-112 Column: Public date: 2023-08-10

Title:: Effect of Fertilizer Types on Phosphorus Loss on Slope Under Simulated Rainfall

Author(s):: QIU Ye¹, QU Zhixu¹, HAN Yuguo^1,2, PENG Yulin¹, WU Dunrui³; (1.School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China; 2.Beijing Engineering Research Center of Soil and Water Conservation, Beijing 100083, China; 3.Beijing General Brigade of Water Affairs Law Enforcement, Beijing 102400, China)

Keywords:: simulated rainfall; fertilizer type; phosphorus loss; phosphorus loss concentration

CLC:: S157.4; X501

DOI:: 10.13869/j.cnki.rswc.2023.05.016.

Abstract:: [Objective] The aims of this study are to explore the reasons for the differences in phosphorus loss between organic fertilizer and inorganic fertilizer and expound whether inorganic fertilizer could be replaced with organic fertilizer to reduce phosphorus loss, and then to prevent and control pollution from non-point sources. [Methods] Simulated rainfall experiment was carried out to compare the differences in the characteristics of phosphorus losses on the slopes with chicken manure as organic fertilizer and phosphorus pentoxide as inorganic fertilizer. [Results] Rainfall intensity had significant effects on the runoff yield and sediment yield on the slope(p<0.05). The runoff yield and sediment yield under 90 mm/h rainfall intensity treatment were 47.40% and 64.48% higher than those under 60 mm/h rainfall intensity treatment, respectively. Fertilizer type had no significant effect on runoff yield(p>0.05). With the increase of rainfall intensity, soluble total phosphorus concentration in runoff and orthophosphate concentration in runoff decreased by 29.72% and 22.00% on average, respectively. The increase of rainfall intensity also reduced the total particulate phosphorus concentration and available sediment phosphorus concentration on the slope with inorganic fertilizer application by 19.47% and 27.78% on average. As the rainfall intensity increased, the concentrations of particulate total phosphorus and available phosphorus in sediment on the slope with organic fertilizer application increased by 36.28% and 128.11% on average. The increase of rainfall intensity also led to the loss of dissolved total phosphorus, runoff phosphate, particulate total phosphorus and sediment available phosphorus, which increased by 11.81%, 27.82%, 68.45% and 144.64% on average, respectively. The phosphorus concentration in the treatment of inorganic fertilizer was several times higher than that in organic fertilizer treatment, and the dissolved total phosphorus, runoff orthophosphate, particulate total phosphorus and sediment available phosphorus were 2.22 times, 6.83 times, 2.73 times and 8.20 times, respectively. Compared with inorganic fertilizer treatment, organic fertilizer treatment could reduce slope phosphorus loss, where dissolved total phosphorus, runoff orthophosphate, particulate total phosphorus, sediment available phosphorus loss decreased by 68.11%, 85.51%, 54.47%, 80.69% on average, respectively. [Conclusion] Replacing inorganic fertilizer with organic fertilizer could reduce phosphorus loss concentration and phosphorus loss on slope. In agricultural production, organic fertilizer should be considered first, and a certain depth of fertilization should be necessary to avoid surface application.

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Last Update: 2023-08-10