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Experiments of Rice Cultivation for Establishment of Total Nitrogen(T-N) Item of Agricultural Water Standards  

Choi, Sun-Hwa (Rural Research Institute of KARICO)
Kim, Ho-il (Rural Research Institute of KARICO)
Yoon, Kyung-Seup (Rural Research Institute of KARICO)
Choi, I-Song (College of Environment & Applied Chemistry, Kyung Hee University)
Oh, Jong-Min (College of Environment & Applied Chemistry, Kyung Hee University)
Publication Information
Journal of Korean Society on Water Environment / v.20, no.3, 2004 , pp. 301-306 More about this Journal
Abstract
The present water quality standards for agricultural were established without considering the effects of water quality on the safety, growth, yield and quality of crops. This study was carried out to investigate the effects of irrigation water quality on the growth, yield, and grain quality of rice, and to acquire basic knowledges to set up water quality standards for irrigation. The field and pot experiments were conducted with irrigation water that was previously adjusted four concentrations (control, 5, 10, 20 mg/L) and six concentrations (control, 5, 10, 15, 20, 30 mg/L) by $NH_4NO_3$ solution and replicated three and four times with randomized block design, respectively. The results of this study showed that the inorganic nutrient of rice plant, rice protein contents and number of panicle tended to increase as the T-N concentration in irrigation water was increased. In addition, grain yield at T-N 10 mg/L and 20mg/L were significantly higher than the control at the field experiment. From the pot experiment at T-N 30 mg/L, the percentage of head rice was slightly lower due to the increase of green kernel and white belly/core kernel.
Keywords
Agricultural water; Water quality standards; Total nitrogen; Rice culture; Grain yield; Rice grain quality;
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