Effects of Applying Two Chemical Additives to the Litter on Nitrogen and Soluble Reactive Phosphorus Contents of Litter in Broiler House

두 가지의 화학제재 첨가가 육계 깔짚내 질소와 수용성 인의 함량에 미치는 영향

  • Choi I. H. (Feed and Nutrition Laboratory, College of Natural Resources, Taegu University) ;
  • Nahm K. H. (Feed and Nutrition Laboratory, College of Natural Resources, Taegu University)
  • 최인학 (대구대학교 자연자원대학 가축사료영양학 연구실) ;
  • 남기홍 (대구대학교 자연자원대학 가축사료영양학 연구실)
  • Published : 2004.12.01

Abstract

This study was conducted to determine the effects of two chemical additives on nitrogen (N) and soluble reactive phosphorus (SRP) contents in litter (rice hull) after broiler chicks were raised for 42 days. Two different additives were applied as a top dressing to the litter at a rate of 200 g ferrous sulfate $(FeSO_4)$ or 200 g aluminum sulfate [$Al_2(SO_4)_3$ $\cdot$ $14H_2O$, Alum] per kg litter, while the control group did not have the two chemicals added to the litter. A total of 64 broiler chicks (4 treatments$\times$4 replicates$\times$4 birds) were fed the experimental diets for 6 weeks. There was no difference in pH between the two chemical treatments and control group, but SRP content was significantly affected on it (P<0.01). SRP contents from ferrous sulfate and alum treated litter at 6 weeks were reduced by $79\%$ and $60\%$, respectively, as the two chemical treatments decreased the pH compared to the control group. In the ferrous sulfate treated litter, EC, TC, $NH_4-N$, $NO_3$-N, and IN contents did not show any difference between $FeSO_4$ treatment and control. However, the differences between $FeSO_4$ treatment and control were found in moisture, TN, ON, AN, PAN, C:N, and C:ON contents (P<0.01). As seen in the alum treated litter, there were differences in moisture, TC, TN, $NH_4-N$, IN, AN, PAN, and C:N contents between alum treatment and control (P<0.05 and 0.01) but no differences in EC, $NO_3-N$, ON, and C:ON. In conclusion, the results of this research show that ferrous sulfate and alum-treatment of poultry litter has the potential to increase N and reduce SRP content by lowering litter pH and moisture content.

본 연구에서는 두 화학제재($FeSO_4$와 Alum)를 처리한 영향이 깔짚 위에서 육계를 42일간 사육한 후 깔짚내 질소와 수용성 인 함량에 어떤 차이가 있는지 대조구와 비교시험을 하였다. 2가지 실험은 처리구에서 깔짚 kg당 화학제재를 $FeSO_4$ $7H_2O$ 200 g이나 $Al_2(SO_4)_3$ $\cdot$ $14H_2O$ 200 g을 top dressing 한 후 그 각각을 대조구와 비교하였다. 사양시험에서는 총 64수(4처리$\times$4반복$\times$4수)의 육계를 배치하였다. 두 화학제재 처리구($FeSO_4$와 Alum)는 두 대조구와 비교할 때 pH는 통계적 유의성이 없었지만, 수용성 인 함량은 고도의 유의성이 인정되었다(P<0.01). 두 화학제재 처리구($FeSO_4$와 Alum)의 SRP 함량은 대조구 각각보다 $79\%$$60\%$의 감소를 보였다 $FeSO_4$ 처리구와 대조구간에는 EC, TC, $NH_4$-N, $NO_3$-N 및 IN 함량은 유의성이 없었지만, 수분, TN, ON, AN, PAN C:N 및 C:ON은 통계적 유의성이 인정되었다(P<0.01). Alum 처리구와 대조구의 결과는 EC, $NO_3$,-N, ON 및 C:ON을 제외한 수분, TC, TN, $NH_4$-N, IN, AN, PAN 및 C:N은 통계적 유의성이 인정되었다(P<0.05와0.01). 본 연구 결과를 다시 종합하면 깔짚에 두 화학제재를 각각 처리할 경우 깔짚내의 질소 함량은 높았으며 SRP함량을 감소시켰다.

Keywords

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