춘계답리작 토양에서 두과의 질소고정과 이의 화본과로의 이동 = Nitrogen Fixation of Legumes and Transfer to Grasses in Spring Paddy Soil

국문 초록 (Abstract)

분뇨이용에 대한 관심이 높아지면서 질소고정을 통해 동반하는 작물에 질소를 고정하고 이동하는 두과와 화본과의 혼파가 주목을 받고있다. 본 연구는 각기 다른 혼파조합이 춘계논 토양에서 두과작물의 질소고정과 이의 이동을 규명하고자 실시하였다. 시험처리는 난괴법 3처리, 3반복이었으면 세 개의 다른 혼파처리는 호밀+벳치, 이탈리안라이그래스+크림손클로버 그리고 연맥+완두였다. 충남 서천의 논토양을 포트에 채워 시험을 하였다. 호밀과 헤어리벳 치구는 수원의 진흥청 포장에서 이식하였고 나머지 두 처리는 3월 초에 각기 다른 화본과 두과의 비율로(이탈리안라이그래스:크림손클로버 =7:3, 연맥:완두=6:4)포트에 파종하였다. 99.8%의 질소동위원소{(15 NH₄)₂SO₄ solution at. 99.8 atom%15N}는 ㏊당 2㎏의 수준으로 각 포트에시용하였는데 호밀과 벳치는 4월 6일 그리고 나머지 두 처리는 4월 16일에 처리하였다. 각 포트에서 출수기에 수확하여 화본과와 두과로 분리한 다음 총질소와 15N값은 서울대학교부설 나이샘(NICEM)의 매스 스팩트로메트리로 분석하였다. 호밀+헤어리벳치, 이탈리안라이그래스+크림손클로버 그리고 연맥+완두 처리의 건물함량은 각각 6,607㎏, 3,212㎏ 그리고 4,312㎏였다. 공중질소에서 기인한 질소의 비는 0.73(호밀+벳치), 0.42(이탈리안라이그래스+크림손클로버) 그리고 0.93(연맥+완두)였다. 두과에서 화본과로의 질소이동비율은 차이법에서 61%에서 4% 사이였고, 동위원소법에서는 12%에서 ？32% 범위였다.

다국어 초록 (Multilingual Abstract)

Manure recycle is an emerging issue in agriculture in Korea these days. Farmers are keeping eye on legume mixture with grasses for nitrogen fixation and transfer to companion crops by legumes. We had a trial to investigate the effect of different legume mixtures on nitrogen fixation and transfer in spring soil. The treatment was arranged in a randomized complete block design with three replications. Three different mixtures were used(rye+hairy vetch, Italian ryegrass+crimson clover, oat+pea) and sowed in pots with paddy soil from western part of Korea(Seo Chon County). Pots with rye+vetch were transplanted from field of RDA(rural development administration) in Suwon on 2 February 2007 and other mixture treatments were sowed on early March with different sowing rate(7:3=Italian:crimson, 6:4=oat:pea). ( 15 NH₄)₂SO₄ solution at. 99.8 atom %¹？N was applied to the each pot at the rate of 2㎏ N ㏊？¹. Application was done on 6 April at rye+vetch pots and remainder were applied on April 16. Forage were harvested from each pot at ground level in heading stage and separated into legume and grass. Total N content and 15 N value were determined using a continuous flow stable isotope ratio mass spectrometry. DM yield of rye+vetch, Italian+crimson and oat+pea were 6,607, 3,213 and 4,312 ㎏/㏊, respectively. Proportion of N from fixation was 0.73(rye+vetch), 0.42(Italian+crimson) and 0.93(oat+pea). The percentages of N transfer from legume to grass were from 61 % to 24 % in different method by treatment and ？35% to 21 % in isotope dilution method.

목차 (Table of Contents)

• ABSTRACT
• Ⅰ. 서론
• Ⅱ. 재료 및 방법
• Ⅲ. 결과 및 고찰
• Ⅳ. 요약
• Ⅴ. 사사
• Ⅵ. 인용문헌

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