Utilization of biochar impregnated with anaerobically digested slurry as slow-release fertilizer

Taek Keun Oh, Yoshiyuki Shinogi, Seung Joo Lee, Bongsu Choi

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We examined the possibility of an environment-friendly slow-release fertilizer (SRF) made of biochar impregnated by anaerobically digested slurry. The biochar materials were produced from three types of feedstocks (orange peel, residual wood, water-treatment sludge) at different temperatures of 300°C, 500°C, and 700°C via pyrolysis. The release behaviors of the water-soluble K+, Ca2+, and Mg2+ were similar for all impregnated biochars and the commercial SRF used. The water-retention capacity was greatly improved by mixing the biochar-SRF with the soil. The yield of lettuce was lower for the biochar-SRF applications of 3.7 to 34.2 t ha-1 than for the commercial SRF application of 51.4 t ha-1. This might be due to excessive increase of soil pH for the biochar-SRF application. Based on these results, the authors concluded that the biochar impregnated with nutrients could become an effective slow-release K+ fertilizer.

Original languageEnglish
Pages (from-to)97-103
Number of pages7
JournalJournal of Plant Nutrition and Soil Science
Volume177
Issue number1
DOIs
Publication statusPublished - Feb 1 2014

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biochar
slow-release fertilizers
slurry
fertilizer application
fertilizer
water retention
pyrolysis
orange peels
water treatment
soil
sludge
feedstocks
water holding capacity
lettuce
soil pH
nutrient
fertilizers
calcium
temperature
nutrients

All Science Journal Classification (ASJC) codes

  • Soil Science
  • Plant Science

Cite this

Utilization of biochar impregnated with anaerobically digested slurry as slow-release fertilizer. / Oh, Taek Keun; Shinogi, Yoshiyuki; Lee, Seung Joo; Choi, Bongsu.

In: Journal of Plant Nutrition and Soil Science, Vol. 177, No. 1, 01.02.2014, p. 97-103.

Research output: Contribution to journalArticle

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