[1]ZHANG Miao,LI Yangyang,BAI Gangshuan.Effects of Mixed Use of Biochar and Polyacrylamide on Water Infiltration and Evaporation in Loessial Soil[J].Research of Soil and Water Conservation,2018,25(05):124-130.
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Effects of Mixed Use of Biochar and Polyacrylamide on Water Infiltration and Evaporation in Loessial Soil
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 05
Page number:
124-130
Column:
Public date:
2018-09-06
- Title:
- Effects of Mixed Use of Biochar and Polyacrylamide on Water Infiltration and Evaporation in Loessial Soil
- Keywords:
- biochar; PAM; infiltration; evaporation
- CLC:
- S152.7+2
- DOI:
- -
- Abstract:
- Using two-factor and three-level (Biochar was applied at rates of 0, 2% and 4% of dry soil weight, and polyacrylamide was used at the rates of 0, 0.02‰ and 0.04‰ of dry soil weight) complete experimental design, we examined the effects of two soil conditioners, biochar and polyacrylamide (PAM), on soil infiltration and evaporation in loessial soil. The results indicated that:(1) the application of biochar had significant effects on steady infiltration rate (A, Philip model) and attenuation exponent (β, Horton model), the application of 2% of biochar had no significant effects on these parameters compared to the contrast, while the application of 4% of biochar had significantly decreased A, but had increased β. The application of PAM had significant effects on K (Kostiakov model), sorptivity (S, Philip model), final and initial infiltration rates (if and i0 respectively, Horton model); application of 0.02‰ of PAM had no effects on these parameters while application of 0.04‰ of PAM siginificantly decreased these parameters; the significant interaction of biochar and PAM for most infiltration parameters was found. The mixed application of 2% of biochar and 0.02‰ of PAM was the best in improving the infiltration rates in all treatments; (2) there were no significant effects of biochar, PAM and their interaction on the evaporation rate and cumulative evaporation, indicating that single or mixed use of biochar and PAM had no effects on soil evaporation in loessial soil.
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1900-01-01