Journal of Integrative Agriculture ›› 2022, Vol. 21 ›› Issue (12): 3600-3610.DOI: 10.1016/j.jia.2022.07.041

所属专题: 农业生态环境-肥料及施用合辑Agro-ecosystem & Environment—Fertilizer

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JIA-2021-1243 Co-application of compost or inorganic NPK fertilizer with biochar influenced soil quality, grain yield and net income of rice

  

  • 收稿日期:2021-07-20 接受日期:2021-10-08 出版日期:2022-12-01 发布日期:2021-10-08

Co-application of compost or inorganic NPK fertilizer with biochar influenced soil quality, grain yield and net income of rice

Christian Adler PHARES1, Selorm AKABA2   

  1. 1 Department of Soil Science, School of Agriculture, University of Cape Coast, Ghana
    2 Department of Agriculture Economics and Extension, School of Agriculture, University of Cape Coast, Ghana
  • Received:2021-07-20 Accepted:2021-10-08 Online:2022-12-01 Published:2021-10-08
  • Contact: Correspondence Christian Adler PHARES, E-mail: christian.phares@ucc.edu.gh
  • About author:Correspondence Christian Adler PHARES, E-mail: christian.phares@ucc.edu.gh

Abstract:

Most agricultural soils in sub-Saharan Africa are degraded, compromising the grain yield of rice and farmers return on investment.  A 3-year field study was undertaken to explore the effect of the application of compost or inorganic NPK fertilizer applied alone or in combination with biochar on soil quality, grain yield of rice and net income.  The five treatments were laid out using a randomized complete block design with four replications.  The treatments were applied to supply approximately 75 kg N ha–1.  The best fertilizer input was compost+biochar which resulted in the greatest improvement in soil physico-chemical properties by reducing bulk density and increasing porosity and moisture retention, organic matter content, percent nitrogen, available phosphorus and cation exchange capacity.  Apart from treatment with inorganic fertilizer alone, treated soils showed a decrease in pH. Bacterial and fungal counts and basal respiration decreased in soils in the following order: compost+biochar>compost only>inorganic NPK fertilizer+biochar>inorganic NPK fertilizer>control.  The increase in pooled grain yield and net income in response to treatment followed the order: compost+biochar>NPK+biochar>NPK>compost>control.  The findings suggest that the use of compost or NPK alone might improve soil quality and increase grain yield and net income, but it is greatly recommended to co-apply these fertilisers with biochar. 

Key words: biochar ,  compost ,  inorganic NPK fertilizer , biochar-enriched compost ,  biochar-enriched NPK fertilizer ,  soil quality ,  net income ,  rice yield