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[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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Effect of Biochar on Reconstructed Soil Chemical Properties and Drought Resistance of Medicago sativa

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:: Effect of Biochar on Reconstructed Soil Chemical Properties and Drought Resistance of Medicago sativa

Author(s):: WANG Lingling¹，CAO Yingui^1,2，WANG Fan¹，HUANG Yuhan¹，SHANG Zhi³，SHE Changchao³，WANG Dangchao³，BAI Zhongke¹; (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)

Keywords:: land reclamation; soil reconstruction; soil chemical properties; biochar; drought resistance

CLC:: S158; S541

DOI:: -

Abstract:: 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，D_1-500-12 had the best effect on soil improvement; in the H₃ scheme，H_3-500-6 had the best effect on soil improvement; in the H₁₀ scheme，H_10-300-24 had the best effect on soil improvement; in the H₁₁ scheme，H_11-500-24 had the best effect on soil improvement; in the H₁₅ scheme，H_15-400-6 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，H_3-400-24 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 H_10-300-24. 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.

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Last Update: 2021-10-10