Biochar derived from corn straw affected availability and distribution of soil nutrients and cotton yield

Biochar application as a soil amendment has been proposed as a strategy to improve soil fertility and increase crop yields. However, the effects of successive biochar applications on cotton yields and nutrient distribution in soil are not well documented. A three-year field study was conducted to in...

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Bibliographic Details
Published in:PloS one 2018-01, Vol.13 (1), p.e0189924-e0189924
Main Authors: Tian, Xiaofei, Li, Chengliang, Zhang, Min, Wan, Yongshan, Xie, Zhihua, Chen, Baocheng, Li, Wenqing
Format: Article
Language:English
Subjects:
Agricultural production
Agriculture
Agrochemicals
Biology and Life Sciences
Charcoal
Corn
Corn straw
Cotton
Crop yield
Ecology and Environmental Sciences
Fertilizers
Gossypium
Hydrogen-Ion Concentration
Leaching
Lint
Nitrogen
Nitrogen - analysis
Nutrients
Organic carbon
Organic soils
pH effects
Phosphorus - analysis
Potassium - analysis
Research and Analysis Methods
Soil - chemistry
Soil amendment
Soil amendments
Soil carbon
Soil fertility
Soil improvement
Soil layers
Soil nutrients
Soil profiles
Straw
Zea mays - chemistry
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Summary:Biochar application as a soil amendment has been proposed as a strategy to improve soil fertility and increase crop yields. However, the effects of successive biochar applications on cotton yields and nutrient distribution in soil are not well documented. A three-year field study was conducted to investigate the effects of successive biochar applications at different rates on cotton yield and on the soil nutrient distribution in the 0-100 cm soil profile. Biochar was applied at 0, 5, 10, and 20 t ha-1 (expressed as Control, BC5, BC10, and BC20, respectively) for each cotton season, with identical doses of chemical fertilizers. Biochar enhanced the cotton lint yield by 8.0-15.8%, 9.3-13.9%, and 9.2-21.9% in 2013, 2014, and 2015, respectively, and high levels of biochar application achieved high cotton yields each year. Leaching of soil nitrate was reduced, while the pH values, soil organic carbon, total nitrogen (N), and available K content of the 0-20 cm soil layer were increased in 2014 and 2015. However, the changes in the soil available P content were less substantial. This study suggests that successive biochar amendments have the potential to enhance cotton productivity and soil fertility while reducing nitrate leaching.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0189924