Yang Yingnan, Huang Mingbin. Effects of Different Long-term Fertilization Treatments on Soil Hydraulic Properties and Their Changes with Depth[J]. Bulletin of Soiland Water Conservation, 2022, 42(1): 56-62.
DOI:
Yang Yingnan, Huang Mingbin. Effects of Different Long-term Fertilization Treatments on Soil Hydraulic Properties and Their Changes with Depth[J]. Bulletin of Soiland Water Conservation, 2022, 42(1): 56-62. DOI: 10.13961/j.cnki.stbctb.2022.01.008.
Effects of Different Long-term Fertilization Treatments on Soil Hydraulic Properties and Their Changes with Depth
[Objective] The effects of different fertilization treatments on soil hydraulic properties and their changes with depth were analyzed in order to provide a theoretical basis for formulating scientific fertilization programs
and to promote the sustainable development of agriculture. [Methods] Based on a 36-year long-term fertilization experiment in the Loess Plateau
four fertilization treatments were selected
including no fertilization (CK)
fertilization with nitrogen and phosphorus (NP)
fertilization with manure (M)
and fertilization with nitrogen
phosphorus
and manure (NPM). Changes in soil properties were evaluated by measuring soil organic matter content
bulk density
porosity
and moisture parameters. [Results] ① NPM and M significantly increased organic matter content in the 0—20 cm soil layer compared with CK and NP
but there were no significant differences in the 30—40 cm soil layer; ② NP significantly reduced soil porosity of the 0—20 cm soil layer compared with CK
M
and NPM; ③ All fertilization treatments significantly increased field capacity and available water holding in the 0—20 cm soil layer compared with CK
and NPM had the greatest effect; ④ NPM significantly increased the saturated hydraulic conductivity of the 0—10
10—20
and 20—30 cm soil layers. [Conclusion] The combined application of organic and chemical fertilizers can improve physical properties and increase available water holding capacity of the surface soil
while the application of chemical fertilizers will cause the surface soil to compact
resulting in unfavorable conditions for crop growth.
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