Nitrogen Effects on Growth Responses and Carbohydrate Concentrations in Source and Sink Tissues of Two Rice Cultivars
2000
Song Beom-Heon | Lee Chul Won Chungbuk National University, Cheongju (Korea Republic)
Two rice cultivars (Oryza sativa L.), Hwaseongbyeo of Japonica type and Taebackbyeo of Indica/Japonica type, were cultivated with hydroponic culture to examine nitrogen effects on the growth responses, contents and utilizations of carbohydrates, and the ripening velocity of grains with three different N levels. Plant height and tiller number were clearly increased to 80 ppm N level compared to 40 ppm N level and then they were slightly decreased in N level of 120 ppm. Higher dry weights were appeared with 80 ppm N level than did with other N levels, showing statistically differences in both cultivars and N levels, while dry weight of roots was heavier with decreasing the N levels.
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