[논문]화학비료, 가축분뇨 및 퇴비의 질소동위원소비

임상선; 이상모; 이승헌; 최우정

화학비료, 가축분뇨 및 퇴비의 질소동위원소비
Nitrogen Isotope Compositions of Synthetic Fertilizer, Raw Livestock Manure Slurry, and Composted Livestock Manure 원문보기

韓國土壤肥料學會誌 = Korean journal of soil science & fertilizer, v.43 no.4, 2010년, pp.453 - 457

임상선 (전남대학교 농업생명과학대학 지역바이오시스템공학과) , 이상모 (서울대학교 농생명과학공동기기원) , 이승헌 (한국농어촌공사 농어촌연구원) , 최우정 (전남대학교 농업생명과학대학 지역바이오시스템공학과)

초록
AI-Helper

화학비료, 가축분뇨 및 퇴비 등 주요 질소원의 질소동위원소비 (${\delta}^{15}N$) 차이를 조사하기 위해 각각 8, 4, 37점의 시료를 채취하여 ${\delta}^{15}N$을 분석하였다. 평균 ${\delta}^{15}N$ 값은 화학비료가 $-1.5{\pm}0.5$‰ (범위: -3.9~+0.5‰‰), 가축분뇨가 $+6.3{\pm}0.4$‰ (+5.3~+7.2‰), 가축분퇴비가 $+16.0{\pm}0.4$‰ (+9.3~+20.9‰)였다. 화학비료가 타 질소원에 비해 ${\delta}^{15}N$ 값이 낮은 것은 화학비료 제조시 이용하는 질소원인 대기 $N_2$의 ${\delta}^{15}N$ 값 (0‰)을 반영하기 때문이다. 반면, 가축분에 비해 퇴비의 ${\delta}^{15}N$ 값이 높은 것은 퇴비화 과정 중 일어나는 질소손실 (특히, 암모니아 휘산)과 관련된 질소동위원소분할효과 ($^{14}N$의 손실속도>$^{15}N$의 손실속도)에 의한 퇴비 중 $^{15}N$ 농축에 의한 결과로 판단된다. 따라서, 본 연구는 ${\delta}^{15}N$ 분석을 통해 현재 우리나라 농업 시스템에서 가장 널리 이용되고 있는 두 가지 질소원 (화학비료와 퇴비)을 구분할 수 있음을 보여준다.

Abstract ▼ AI-Helper

To investigate the difference in N isotope ratio ($^{15}N/^{14}N$, expressed as ${\delta}^{15}N$) among N sources (synthetic fertilizer, livestock manure, and manure compost), eight synthetic fertilizer, four livestock manure, and thirty-seven compost samples were collected and analyzed for ${\delta}^{15}N$. The mean ${\delta}^{15}N$ values of N sources were $-1.5{\pm}0.5$‰ (range: -3.9 to +0.5‰) for synthetic fertilizer, $+6.3{\pm}0.4$‰ (+5.3 to +7.2‰) for manure, and $+16.0{\pm}0.4$‰ (+9.3 to +20.9‰) for compost. The lower ${\delta}^{15}N$ of synthetic fertilizer was attributed to its N source, atmospheric $N_2$ of which ${\delta}^{15}N$ is 0‰ Meanwhile, more $^{15}N$-enrichment of compost than manure was assumed to be resulted from N isotopic fractionation (faster loss of $^{14}N$-bearing compound than $^{15}N$) associated with N loss particularly via $NH_3$ volatilization during composting. Therefore, our study shows that ${\delta}^{15}N$ values could successfully serve in discriminating two major N sources (synthetic fertilizer and compost) in agricultural system.

주제어

AI 본문요약
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문제 정의

Therefore, this study shows the potential use of δ15N technique in discriminating compost-derived N and fertilizer-derived N in agricultural system.

제안 방법

In this study, δ15N values of different N sources (synthetic fertilizer, manure, and compost) were investigated to confirm their differences in N isotopic compositions.

대상 데이터

O ratio: 11-12-10, 12-8-12, 13-0-13, 15-15-15, 16-0-12, and 21-17-17) were collected. Four livestock manure samples (two pig, one cattle, and one poultry) were taken from the livestock feedlots around Gyonggi and Chonnam Provinces. Thirty-seven samples of commercially available composts were collected from compost manufacturing factories.

데이터처리

Statistical analysis

Statistical analysis was carried out with PASW Statistics (SPSS Inc. Chicago, IL). We report the range, frequency distribution, and means (with standard errors) of δ¹⁵N values without statistically based comparison due to the inherent limitation of the study design (pseudoreplicated samples).

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