Statistical analysis was carried out to identify the influence on environmental factors between paddy water chemical properties and Chl-a concentration (algae biomass index) using water samples collected in June for 3 years at rice paddy field. As a result of correlation analysis, there was a significantly negative relationships in DO(-0.366) and pH(-0.141). In contrast, significantly positive relationships were founded in COD(+0.431) and TOC(+0.422). According to the result of factor analysis, 3 factors were obtained and indicated that PC1 were Ca, K, Mg cation, PC2 were TOC, T-P, PO4 3--P and DO, and PC3 were T-N and NH4 +-N. As a result of linear regression analysis to develop a prediction model for chl-a concentration, the total amount of explanation was 20.6%, PC2 had the greatest influence on the increase of chl-a concentration and PC1 also showed a positive correlation but the PC3 has a negative correlation. In conclusion, carbon and phosporous content are the main factors for the increase algae blooms of rice paddy.

Abstract
1. 서 론
2. 재료 및 방법
    2.1. 수질시료 채취 및 이화학성 분석
    2.2. 통계분석
3. 결 과
    3.1. 지역별 논물의 화학적 특성
    3.2. 수질환경 요인들과 Chl-a와의 상관분석(correlation analysis)
    3.3. 수질환경 요인분석(factor analysis)
    3.4. Chl-a 농도에 대한 회귀모형
4. 결 론
REFERENCES

• 배희수(농촌진흥청 국립식량과학원) | Hui Su Bae (National Institute of Crop Science, RDA) Corresponding author
• 장현수(농촌진흥청 국립식량과학원) | Hyeonsoo Jang (National Institute of Crop Science, RDA)
• 황재복(농촌진흥청 국립식량과학원) | Jaebok Hwang (National Institute of Crop Science, RDA)
• 안승현(농촌진흥청 국립식량과학원) | Seung Hyeon Ahn (National Institute of Crop Science, RDA)
• 윤종탁(농촌진흥청 국립식량과학원) | Jong Tak Youn (National Institute of Crop Science, RDA)
• 김욱한(농촌진흥청 국립식량과학원) | Uk Han Kim (National Institute of Crop Science, RDA)
• 배범수(농촌진흥청 국립식량과학원) | Beomsoo Bae (National Institute of Crop Science, RDA)