Pedosphere 28(3): 521--529, 2018
ISSN 1002-0160/CN 32-1315/P
©2018 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Responses of Saline Soil Properties and Cotton Growth to Different Organic Amendments
WU Yupeng1,2, LI Yufei2,3, ZHANG Yi2,4, BI Yanmeng2, SUN Zhenjun2
1College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070(China)
2College of Resources and Environmental Sciences, China Agricultural University, Beijing 100194(China)
3Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097(China)
4School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518000(China)
      Application of organic waste to saline alkaline soils is considered to be a good practice for soil remediation. The effects of applying different organic amendments (e.g., cattle dung, vermicompost, biofertilizer) and earthworm inoculations (Eisenia fetida) on saline soils and cotton growth were investigated during 1 year of cotton cultivation. Compared to the control (applied with inorganic NPK fertilizer), applying organic amendments improved soil physicochemical properties. Biofertilizer application improved available nutrient content, reduced short-term soil electrical conductivity, and produced the highest cotton yield, whereas cattle dung and vermicompost applications resulted in higher soil organic matter content. Application of organic amendments significantly increased soil microbial biomass carbon during the flowering period, which sharply declined at harvest. This was especially true for the biofertilizer treatment, which also exhibited lower nematode abundance compared with the other organic materials. Earthworm inoculation following cattle dung application failed to significantly change soil physicochemical properties when compared to the treatments without earthworm inoculation. Results suggest that biofertilizer application to saline soil would improve soil nutrient status in the short-term, whereas cattle dung application would improve soil organic matter content and increase soil organism abundance to a greater extent. However, different strategies might be required for long-term saline soil remediation.
Key Words:  biofertilizer,cattle dung,earthworm inoculation,saline soil remediation,vermicompost
Citation: Wu Y P, Li Y F, Zhang Y, Bi Y M, Sun Z J. 2018. Responses of saline soil properties and cotton growth to different organic amendments. Pedosphere. 28(3):521-529.
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