COMPARATIVE STUDY ON THE RESPONSE OF INDICA AND JAPONICA RICE PLANTS TO AMMONIUM AND NITRATE NITROGEN
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概要
- 論文の詳細を見る
The effects of NH_4^+ and NO_3^- as nitrogen sources on the growth of two subspecies of rice, Oriza sativa subsp. Indica and Oriza sativa subsp. Japonica, during the first 6 weeks of growth were studied by the water culture method. The results obtained indicated that Indica and Japonica rice plants respond differently to NO_3^-. Although both Indica and Japonica grew fairly well in solutions containing the two forms of nitrogen, the growth of the former was superior in NO_3^- than in NH_4^+ + NO_3^- or NH_4^+ solutions, especially at relatively low nitrogen concentrations, whereas the growth of the latter was inferior in NO_3^- than in NH_4^+ + NO_3^- solutions. In addition, plants of both subspecies fed with NH_4^+ showed growth retardation with tip-burning of the lower leaves and poorly branched roots. On the other hand, under moderately warmed glass house conditions with natural sunlight in winter, the growth of Indica in NO_3^- solution was appreciably reduced compared to that in NH_4^+ + NO_3^-. Thus, the effects of climatic conditions such as temperature and intensity of sunlight on the response of rice plants to NH_4^+ and NO_3^- nitrogen appear to be very important.
- 社団法人日本土壌肥料学会の論文
著者
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Chanh Ta
Department Of Agricultural Chemistry Utsunomiya University
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Tsutsumi Michio
Department Of Agricultural Chemistry Utsunomiya University
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Tsutsumi Michio
Department Of Agricultural Chemistry Faculty Of Agriculture Tohoku University
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KURIHARA Kinkichi
Department of Agricultural Chemistry, Utsunomiya University
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Kurihara Kinkichi
Department Of Agricultural Chemistry Utsunomiya University
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