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벼 재배지 논물의 수질특성과 Chl-a 변동 요인의 통계적 분석
배희수 ( Hui Su Bae ),장현수 ( Hyeonsoo Jang ),황재복 ( Jaebok Hwang ),안승현 ( Seung Hyeon Ahn ),윤종탁 ( Jong Tak Youn ),김욱한 ( Uk Han Kim ),배범수 ( Beomsoo Bae ) 한국환경과학회 2019 한국환경과학회지 Vol.28 No.11
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, PO<sub>4</sub><sup>3-</sup>-P and DO, and PC3 were T-N and NH<sub>4</sub><sup>+</sup>-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.