PARTITIONING OF CARBON, NITROGEN, PHOSPHORUS, POTASSIUM, CALCIUM, AND MAGNESIUM IN A SEMIDWARF HIGH-YIELDING RICE VARIETY : COMPARISON WITH A CONVENTIONAL JAPONICA VARIETY
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概要
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To clarify the physiological character of the high-yielding rice (Oryza sativa L.) varieties, dry matter production and partitioning of C, N, P, K, Ca, and Mg were compared between Suweon 258, a semidwarf indica variety and Musashikogane, a conventional japonica variety under pot conditions. Translocation of C and N in plants was investigated using tracers, ^<13>C and ^<15>N, respectively. The total dry mater and carbon content were similar in the two varieties. However, the panicle weight of Suweon 258 was 23% larger than that of Musashikogane due to the higher weight ratio of panicle/shoot. The Suweon 258 plants actively stored and exported carbohydrates in the culm plus leaf sheath, and also showed a higher partitioning of C, N, P, and Mg to the panicle, whereas the percentage distribution of K and Ca to the panicle was similar in the two varieties. Total K uptake of Suweon 258 was larger than that of Musashikogane, and in the latter plants K was obviously lost at the late growing stage.
- 社団法人日本土壌肥料学会の論文
著者
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YONEYAMA Tadakatsu
Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The U
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Yoneyama Tadakatsu
Department Of Agricultural Chemistry University Of Tokyo:(present Address)division Of Environmental
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Fukuda Mamoru
Saga Prefectural Agricultural Experiment Station
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KOUCHl Hiroshi
Department of Applied Physiology, National Agrobiological Resources
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Kouchl Hiroshi
Department Of Applied Physiology National Agrobiological Resources
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Yoneyama Tadakatsu
Department Of Agricultural Chemistry University Of Tokyo
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