[1]WANG Lingling,CAO Yingui,WANG Fan,et al.Effect of Biochar on Reconstructed Soil Chemical Properties and Drought Resistance of Medicago sativa[J].Research of Soil and Water Conservation,2021,28(06):105-114.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 06
Page number:
105-114
Column:
Public date:
2021-10-10
- Title:
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Effect of Biochar on Reconstructed Soil Chemical Properties and Drought Resistance of Medicago sativa
- Author(s):
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WANG Lingling1,CAO Yingui1,2,WANG Fan1,HUANG Yuhan1,SHANG Zhi3,SHE Changchao3,WANG Dangchao3,BAI Zhongke1
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(1.School of Land Science and Technology,China University of Geosciences,Beijing 100083,China; 2.Key Lab of Land Consolidation,Ministry of Natural Resources,Beijing 100035,China; 3.Shenhua Beidian Shengli Energy Co.,Ltd.,Xilinhot,Inner Mongolia 026000,China)
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- Keywords:
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land reclamation; soil reconstruction; soil chemical properties; biochar; drought resistance
- CLC:
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S158; S541
- DOI:
-
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- Abstract:
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The purpose of this study was to improve the effect of ecological restoration under drought stress in the grassland open-pit mining area. The topsoil,coal gangue,rock and soil stripping and fly ash from the Shengli open-pit mine area were constructed to reconstruct soil according to different proportions. Biochar with different pyrolysis temperatures was used as soil improver,and the variance analysis method was used to carry out the study on the effect of biochar on soil chemical properties and drought resistance of alfalfa. The results showed that:(1)application of biochar with different treatments had different effects on soil chemical properties in different schemes; in the D1 scheme,D1-500-12 had the best effect on soil improvement; in the H3 scheme,H3-500-6 had the best effect on soil improvement; in the H10 scheme,H10-300-24 had the best effect on soil improvement; in the H11 scheme,H11-500-24 had the best effect on soil improvement; in the H15 scheme,H15-400-6 had the best effect on soil improvement;(2)in the reconstructed soil group H3,H10 and H11,the survival rate of alfalfa under drought stress was significantly improved when the biochar pyrolysis temperature was 300℃ or 400℃ and the application amount was 24 g; in the pot experiment,H3-400-24 had the highest survival rate of alfalfa under drought stress;(3)with respect to the comprehensive effects of biochar applied in different treatment methods on soil chemical properties and drought resistance of alfalfa,the optimal biochar treatment method was H10-300-24. Application of biochar with different treatments has different effects on the improvement of soil chemical properties,and also has different effects on the improvement of plant drought resistance under drought stress.