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Position: Home > Articles > Co-application of compost or inorganic NPK fertilizer with biochar influences soil quality, grain yield and net income of rice Journal of Integrative Agriculture 2022,21 (12)

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

作者：

Phares, Christian Adler;Akaba, Selorm

单位：

Univ Cape Coast, Sch Agr, Dept Agr Econ & Extens, Cape Coast, Ghana;Univ Cape Coast, Sch Agr, Dept Soil Sci, Cape Coast, Ghana

关键词：

biochar;compost;inorganic NPK fertilizer;biochar-enriched compost;biochar-enriched NPK fertilizer;soil quality;net income;rice yield

摘要：

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.

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

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