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http://dx.doi.org/10.11625/KJOA.2017.25.1.203

Comparison of Growth of Rice and Nutrient Concentration in a Season in Large-scale Environment-friendly Agricultural Districts  

Jeong, Jee-Eun (대구가톨릭대학교 원예학과)
Choi, Hyun-Sug (대구가톨릭대학교 원예학과)
Jung, Seok-Kyu (대구가톨릭대학교 원예학과)
Publication Information
Korean Journal of Organic Agriculture / v.25, no.1, 2017 , pp. 203-218 More about this Journal
Abstract
The study was initiated at three rice paddy fields of each large-scale area environment-friendly agricultural district, Suncheon and Jangheung in Jeollanam-do, and Okcheon in Chungcheongbuk-do in 2016 to observe growth and nutrients in soil and rice in a season. Jangheung farm had two observed plots; conventional plots and conventional plots additionally fertilizing of 20% T-N with oil-cake. Soil pH, EC, and K concentration on June in Jangheung farm were significantly higher than those values observed in Suncheon and Okcheon farms. Annual rice T-N contents in the Jangheung farm were more than 80 g but decreased in a season. T-N concentration in rice was high in Jangheung farm but the concentrations of P and K were not significantly different among the three farms at harvest. Plant height was as low as 101 cm in Sunchon farm but high in the dry weight (72 g). Leaf SPAD was higher in Jangheung farm than those of other farms. Okcheon farm, with early cultivar 'Milky queen', produced high head rice of 93%, and high unhulled rice and the brown rice per ha. Therefore, the annual production income was as high as 26.7 million won per ha. However, nutrient (T-N + P + K) balance in Okcheon farm with high amount of fertilizer application were as high as 900 kg per ha. On the other hand, nutrient balance in Jangheung farm resulted in less than 300 kg.
Keywords
growth; large-scale area environment-friendly agricultural district; nutrient balance; oil cake; rice;
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