갈대 생육지에서 질소 시비가 사초의 생육과 수량 및 사료가치에 미치는 영향 = Effect of Nitrogen Fertilization on the Forage Growth, Yield and Quality of Native Reed (Phragmites communis)

국문 초록 (Abstract)

본 연구는 질소(N) 시비가 부존 조사료자원인 갈대(Phragmites communis)의 생육과 수량 및 사료가치에 미치는 영향을 구명하고자 2012년에 충남 천안과 경기 안산지역에서 실시되었다. 천안 국립축산과학원 갈대 재배지에서는 N 무시비구, N 50 kg/ha구, N 100 kg구 등 3처리를 두고 4월 30일 시비, 6월 21일 수확하였으며, 안산 시화간척지 갈대 자생지에서는 N 무시비구, N 60 kg/ha구 등 2처리를 두고 5월 1일 시비, 8월 1일 수확하였다. 갈대의 초장과 엽색은 N 시비구에서, 그리고 N 시비수준이 높을 때 양호하였다. 건물률은 N 시비구에서 약간 낮아지는 경향으로 천안지역은 무시비구 39.8%, N 시비구 37.6%, 36.7%, 안산지역은 무시비구 39.4%, N 시비구 37.6%였다. 천안지역의 건물수량, 조단백질 수량 및 가소화 건물수량은 무시비구에서 ha당 각각 4,026 kg, 235 kg, 1,850 kg, N 50 kg 시비구는 각각 4,658 kg, 306 kg, 2,388 kg, N 100 kg 시비구는 각각 5,622 kg, 446 kg, 3,143 kg으로 유의적으로 증가하였으며 (p<0.05), 안산지역은 무시비구에서 각각 2,802 kg, 177 kg, 1,288 kg, N 60 kg 시비구는 각각 3,876 kg, 294 kg, 1,853 kg으로 유의적으로 증가하였다 (p<0.05). 천안지역의 조단백질 함량, 건물 소화율 및 상대사료가치 (RFV)는 무시비구에서 각각 5.85%, 45.96%, 64.0 (품질 5등급), N 50 kg 시비구는 각각 6.58%, 51.27%, 72.3 (5등급), N 100 kg 시비구는 각각 7.94%, 55.91%, 72.7 (5등급)로 높아졌으며, 안산지역도 무시비구에서 각각 6.30%, 45.98%, 70.2 (5등급), N 60 kg 시비구는 각각 7.59%, 47.80%, 78.3 (4등급)으로 높아지는 경향이었다. 이상의 결과를 종합하여 볼 때, 갈대 생육지는 시비가 가능한 조건이라면(하천변이나 강변 등 수질오염이 우려되는 지역이 아닌), ha당 N 60~100 kg을 생육기에 시용해 주는 것이 생산량과 사료가치를 크게 개선시켜줄 수 있어 바람직하였다.

다국어 초록 (Multilingual Abstract)

This study was carried out to investigate the effect of nitrogen (N) fertilization on the forage growth, production and quality of native reed (Phragmites communis) grasses. Field experiments were conducted in Cheonan and in Ansan, 2012. Treatments were control (no N fertilization), 50 kg/ha and 100 kg/ha in Cheonan plots (fertilization on April $30^{th}$, and harvest on June $21^{st}$). Treatments in Ansan plots were control (no N fertilization) and 60 kg/ha (fertilization on May first, and harvest on August first). Forage growth and leaf colors were improved in N fertilized plots. However, the drymatter (DM) percentage was slightly decreased with N fertilization. Forage yields, in terms of DM, crude protein (CP) and digestible DM (DDM), were significantly increased with N fertilization in both sites. In Cheonan, DM, CP and DDM yields per ha were 4,026 kg, 235 kg and 1,850 kg, respectively, in the control plot, and were 4,658 kg, 306 kg and 2,388 kg, respectively, in the N 50 kg plot, and 5,622 kg, 446 kg and 3,143 kg, respectively, in the N 100 kg plot. In Ansan, DM, CP and DDM yields per ha were 2,802 kg, 177 kg and 1,288 kg, respectively, in the control plot, and were 3,876 kg, 294 kg and 1,853 kg, respectively, in the N 60 kg plot. Forage quality in terms of CP content, in vitro DM digestibility (IVDMD) and relative feed value (RFV) were also increased with N fertilization in both sites. In Cheonan, the CP content, IVDMD and RFV were 5.85%, 45.96% and 64.5 (grade 5), respectively, in the control plot, 6.58%, 51.27% and 72.3 (grade 5), respectively, in the N 50 kg plot, and 7.94%, 55.91% and 72.7 (grade 5), respectively, in the N 100 kg plot. In Ansan, the CP content, IVDMD and RFV were 6.30%, 45.98% and 70.2 (grade 5), respectively, in the control plot, and 7.59%, 47.80% and 78.3 (grade 4), respectively, in the N 60 kg plot. In conclusion, N fertilization of 60~100 kg/ha was desirable for greater forage production, with a higher quality of native Phragmites communis achievable. This should only be applied if the fertilization area is not located at a riverside/streamside or in riparian land where there is a high risk of water pollution by fertilization.

참고문헌 (Reference)

1 서성, "부존 조사료자원 갈대의 생육시기별 사료가치 및 생산량" 한국초지조사료학회 32 (32): 109-116, 2012

2 서성, "가을철 갈대의 수확관리에 따른 이듬 해 조사료 생산성 비교" 한국초지조사료학회 32 (32): 275-284, 2012

3 Holland, C, "The Pioneer Forage Manual-A Nutritional Guide" Pioneer Hi-Bred International, Inc 1-55, 1990

4 Choi, I, "Study on the feed value of domestic wild grasses and legumes" 21 : 21-30, 1999

5 Lee, S.K, "Study on the characteristics of growth and regrowth in Miscanthus sinensis" 5 : 1-7, 1985

6 Chun. W.B, "Studies on the productivity of the native reed (Phragmites communis Trinius). 3. Effect of cutting time on the regrowth and feed composition of native reed" 6 : 78-83, 1986

7 Chun. W.B, "Studies on the productivity of the native reed (Phragmites communis Trinius). 2. Effect of fertilizer application on the productivity of the native reed during the period of vegetation" 6 : 24-30, 1986

8 Chun, W.B, "Studies on the productivity of the native reed (Phragmites communis Trinius). 1. Changes in the productivity of the native reed during the period of vegetation" 4 : 89-97, 1983

9 Yoon, C, "Studies on the native reed (Phragmites communis Trinius) as animal feed resouces. 2. Nutritive values & in vitro dry matter digestibility of the native reed during the period of vegetation" 26 : 706-710, 1984

10 Park, H.S, "Studies on the genetic resources of native pasture plants in Jeju" Rural Development Administration 2007

11 SAS, "SAS User’s Guide. Version 8.01"

12 Moore, R.E, "Procedure for the two-stage in vitro digestion of forage" University of Florida 1970

13 AOAC, "Official methods of analysis" Association of Official Analytical Chemists 1990

14 RDA, "Investigation and Analysis of Research and Technology in Agriculture (Forages)" Rural Development Administration 2003

15 Seo, S, "Hay quality and grade in Korea. Annual Report of Agricultural Politic Service (Animal Science)" Rural Development Administration 2011

16 Seo, S, "Forage quality of Miscanthus sinensis as native grasses according to growth stage. Annual Report of Extension Service (Animal Science)" Rural Development Administration 1217-, 2011

17 MIFAFF, "Forage production and utilization for animal production. Ministry for Food" Ministry for Food, Agriculture, Forest and Fisheries 2011

18 Goering, H.K, "Forage fiber analysis" USDA 1970

19 Tilley, J.M.A, "A two-stage technique for the in vitro digestion of forage crops" 18 : 104-111, 1963

20 Kim, B.T, "A study on the productivity and determination of digestibility of the Phragmites longivalvis Steudel" 18 : 65-68, 1976

21 서성, "2010 해남, 평창, 원주지역 갈대 등 야초 류의 이용실태와 사료가치 평가" 한국초지조사료학회 32 (32): 1-8, 2012

22 서성, "2010 파주, 안산지역 갈대, 억새 등 야초류의 이용실태와 사료가치 평가" 한국초지조사료학회 31 (31): 151-158, 2011