- Volume 31 Issue 2
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Comparison of Nutrient Balance in a Reclaimed Tidal Upland between Chemical and Compost Fertilization for the Winter Green Barley Cultivation
간척농경지에서 비종에 따른 동계 청보리 재배 포장의 영양물질 수지 비교
- Song, In-Hong (Research Institute for Agriculture and Life Sciences, College of Agriculture & Life Science, Seoul National University) ;
- Lee, Kyong-Do (Department of rice and winter cereal crop, NICS, RDA) ;
- Kim, Ji-Hye (Department of Landscape Architecture and Rural Systems Engineering, Research Institute for Agriculture and Life Sciences, Seoul National University) ;
- Kang, Moon-Seong (Department of Landscape Architecture and Rural Systems Engineering, Research Institute for Agriculture and Life Sciences, Seoul National University) ;
- Jang, Jeong-Ryeol (Rural Research Institute, Korea Rural Community Corporation)
- 송인홍 (서울대학교 농업생명과학연구원) ;
- 이경도 (국립식량과학원 벼맥류부) ;
- 김지혜 (서울대학교 조경.지역시스템공학, 농업생명과학연구원) ;
- 강문성 (서울대학교 조경.지역시스템공학, 농업생명과학연구원) ;
- 장정렬 (한국농어촌공사 농어촌연구원)
- Received : 2012.05.14
- Accepted : 2012.06.15
- Published : 2012.06.30
BACKGROUND: Along with the surplus rice production, introduction of upland crop cultivations into newly reclaimed tidal areas has gained public attentions in terms of farming diversification and farmers income increase. However, its impacts on the surroundings have not been well studied yet, especially associated with nutrient balance from reclaimed upland cultivation. The objective of this study was to investigate water and nutrient balance during winter barley cultivation as affected different fertilization methods. METHODS AND RESULTS: TN and TP balance for three different plots treated by livestock compost, chemical fertilizer, and no application were monitored during winter green barley cultivation (2010-2011) at the NICS Kyehwa experimental field in Jeonbuk, Korea. Nutrient content in soil and pore water near soil surface appeared to increase, while sub-soil layer remained similar with no fertilization plot. Livestock compost application appeared to increase organic matter content in surface soil compared to chemical fertilization. Crop yield was the greatest with livestock compost application (10.6 t/ha) followed by chemical fertilization (6.9 t/ha) and no application (1.8 t/ha). The nitrogen uptake rate was also greater with livestock compost (52.4%) than chemical fertilizer (48.1%). Phosphorus uptake rate was much smaller (about 7.0%) compared to nitrogen. Nutrient loss by surface and subsurface runoff seemed to be minimal primarily due to small rainfall amount during the winter season. Most of the remaining nutrients, particularly phosphate seemed to be stored in soil layer. Phosphate accumulation appeared to be more phenomenal in the plot applied by livestock compost with higher phosphorus content. CONCLUSION: This study demonstrated that livestock compost application to tidal upland may increase barley crop production and also improve soil fertility by supplying organic content. However, excessive phosphorus supply with livestock compost seems likely to cause a phosphate accumulation problem, unless the nitrogen-based fertilization practice is adjusted.
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