Composting of the Mixtures with Pig Manure and Castor Meal

돈분과 피마자박의 혼합비율에 따른 퇴비화 연구

  • Chang, Ki-Woon (Division of Applied Biology, Chemistry & Food Science, College of Agriculture and Life Sciences, Chungnam National University) ;
  • Lee, Jong-Jin (PANKOREA Co., Ltd.) ;
  • Hong, Joo-Hwa (Division of Applied Biology, Chemistry & Food Science, College of Agriculture and Life Sciences, Chungnam National University) ;
  • Kim, Nam-Chean (Department of Environmental Health, Eulji University) ;
  • Kim, Wan-Ju (Nonsan Livestock Cooperative) ;
  • Choi, Woo-Young (Division of Applied Biology, Chemistry & Food Science, College of Agriculture and Life Sciences, Chungnam National University)
  • 장기운 (충남대학교 농업생명과학대학 응용생물화학식품학부) ;
  • 이종진 ((주) 판코리아) ;
  • 홍주화 (충남대학교 농업생명과학대학 응용생물화학식품학부) ;
  • 김남천 (을지대학교 보건환경학 전공) ;
  • 김완주 (논산축산업협동조합 유기질비료공장) ;
  • 최우영 (충남대학교 농업생명과학대학 응용생물화학식품학부)
  • Published : 2007.12.31

Abstract

This study was conducted to estimate the humificating grade according to experiment of physico-chemical characterization and phyto-toxicity during composting of using with pig manure and castor meal. The material ratios of the compost which was mixed with pig manure(P), castor meal(C), and saw dust(S) were 5 : 1 : 4(PCS-I), 5 : 2.5 : 2.5(PCS-II) and 5 : 4 : 1(PCS-III) by volume to volume, and they were decomposed for 60 days. In the result, the changes of temperature in all treatments during composting were rapidly increased more than $68^{\circ}C$ at the incipient stage, and gradually decreased within $39^{\circ}C$ at 60 days the after treatment. pH was slowly increased from 7.5 to 7.7, and the C/N ratio was 13~14 at the final composting stage. The low C/N ratio value in this compost was caused by the castor meal contented high nitrogen level(T-N 5.7 %). G.I.(germination index) was showed 73 to 78 range in all treatments at the $60^{th}$ day. Among all treatments PCS-I was appeared to be the best condition for composting.

Keywords