{"created":"2023-06-19T11:38:09.891996+00:00","id":5758,"links":{},"metadata":{"_buckets":{"deposit":"5ffb676e-d289-4b41-94ff-91504e9756b8"},"_deposit":{"created_by":13,"id":"5758","owners":[13],"pid":{"revision_id":0,"type":"depid","value":"5758"},"status":"published"},"_oai":{"id":"oai:mie-u.repo.nii.ac.jp:00005758","sets":["420:421:443:453"]},"author_link":["12673"],"item_4_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1993-03-26","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"50","bibliographicPageStart":"1","bibliographicVolumeNumber":"10","bibliographic_titles":[{"bibliographic_title":"三重大学生物資源学部紀要 = The bulletin of the Faculty of Bioresources, Mie University"}]}]},"item_4_description_14":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_4_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The principal subject to establish systematized techniques in low input rice cultivation is to improve the efficiency of dry matter production to the amount of applied fertilizer. To clarify the primary essentials so as to improve the production efficiency and the characteristics for which rice plant must have a higher production efficiency to the amount of fertilizer applied, the fundamental response to fertilizer regarding the process of individual growth and morphogenesis of the leaf blades of rice plants was investigated in this study.\nI. Various Differences in the Growth Rate at the Seedling Stage The various differences in growth rate and its related characteristics at the seedling stage were examined using 35 rice varieties of different ecotypes and growth types. They were grown until the 8.5-leaf stage under 7 levels of nutrient concentrations of the Kimura B culture solution. Distinctive differences were found particularly in the dry matter increase (ΔW), relative growth rate (RGR) and net assimilation rate (NAR). Several varieties always showed a higher value of ΔW for all nutrient levels. Also highly positive correlations were found between ΔW and RGR, RGR and NAR, and NAR and the nitrogen content per leaf area (NCLA), while being highly significantly negative between NAR and SLA, and NCLA and SLA for all nutrient levels. However, NAR did not correlate with the nitrogen content per leaf dry weight (NCLW). Based on these results, NCLA was specified as a very important factor related to various differences in the growth rate. Consequently, it was concluded that the high ability to increase NCLA is one of the most important characteristics for high growth rate at lower nutrient levels, as well as at higher levels where SLA has a tendency to increase. However, neither ecotypes nor the growth type corresponded with these characteristics.\nII. Types of the Fundamental Growth Response During the Seedling Stage  Fundamental growth response to fertilizer and low- and high-fertilizer-response characteristics in rice plants were examined using 35 rice varieties of different ecotypes and growth types, which were grown until the 8.5-leaf stage under seven levels of nutrient concentrations of the Kimura B culture solution. Though various differences in the response of RGR to fertilizers were not observed clearly before the 6.5-leaf stage, four types of responses were observed during the following grown stage. They were based on the changes in the specific leaf area (SLA) and nitrogen content per leaf area (NCLA), which showed four typical patterns to the nutrient levels. The critical concentration of the nutrients and response intensity with the increase in nutrient concentration in the types of RGR response to fertilization indicated the concentration of culture solution which SLA increase depressed and the degree of NCLA increase, respectively. Moreover, it was clarified that change in SLA and NCLA affected the photosynthetic rate of a single leaf with a change in CO₂ diffusion resistance through the stomata and in the mesophyll. On the other hand, three patterns to nutrient level were observed in nitrogen content per leaf dry weight (NCLW). These results show that both high NCLW and NCLA under a low nutrient level, being found to a small extent in indica rice, are important characteristics for low-fertilizer-response varieties, while higher stable RGR with a small increase of SLA under a high nutrient level, being seen in most of japonica rice, is for high-fertilizer-response ones. As a result of simulation in case SLA did not change in three various groups which SLA was easy to increase and NCLA was hard to increase, it was presumed that the production efficiency increased by 30-40％. Then, utility of heightening NCLA without SLA increase was pointed out.\nIII. Various Differences in Morphological Change in Leaf Blade by Different Nutrient Concentrations of the Culture solution in Rice seedlings\nTo clarify the internal leaf morphology concerned with various differences in specific leaf area (SLA) response to concentrations of a culture solution during the seedling stage, various differences in leaf morphological change with the advance of leaf position and in the response of leaf morphogenesis to nutrient concentrations were investigated. Vascular bundle number (VBN) in the transverse section of leaf blade and leaf width increased as the position advanced, but VBN did not increase with leaf width.  Increase in leaf length with the advance in position was greatest in NNN-type wherein the nitrogen content per leaf area (NCLA) increased but SLA did not increase as the nutrient concentration increased. The increase in VBN and leaf width in NNN-type were less than the others. However, Dular was an exception, which was a variety in SSN-type wherein SLA increased with the nutrient concentration, the VBN did not increase with the nutrient concentration and was much more than others for all concentrations. In the relationship between leaf width and length, leaf area expansion of NNN-type depended on leaf length, but others depended on the leaf width increase. From these results, it become clear that SLA increased when fertilization was heavily applied in the varieties having many VBN by nature, and showing a remarkable increase of VBN in response to the increase in fertilizer. Then, presumably, to improve efficiently rice productive ability in connection with fertilization, it is important that varieties have certain characteristics, i.e. VBN and leaf width do not increase, leaf area expansion depending on the increase in leaf length, and moreover, leaves remain erect even under heavy fertilization.\nIV. Effect of the High Nitrogen Treatment Prior to Transplanting on the Growth and Yield in Rice\nThe effect of temporally high N application was investigated to develop a fertilization method that increase the N content per leaf area (NCLA) without increasing of specific leaf area. The change in N content of the seedlings treated with high N concentration (230, 1150, 2300, 4600, 11500 and 23000 ppm)  for 12-48 hrs, the effect of this treatment prior to transplanting on the growth and yield were analyzed. The result showed that the treatment with 2300ppmN for 12 hrs did not affect leaf thickness, but increased NCLA by 40%. Seedlings pretreated and planted to a lower level of the basal dressing showed remarkable enhancement of net assimilation rate, relative growth rate (RGR) and relative leaf growth rate. As a result of the measurement of the photosynthetic and respiration rates in plants, an increase in the photosynthetic rate with this treatment was confirmed. From the result of field trial under a lower level of soil fertility, various differences were detected in this treatment, such as a dry matter increased of 5-90%, tiller number increased of 10-90% during the early stage of growth. However, this treatment had no effect on plant length for any of varieties. It was considered that this treatment influenced growth directly for 3 weeks, due to the change in RGR. Moreover, increased tillers were lower order ones which were to be productive tillers, clearly, the increasing of tiller number caused a yield increase through an increase in the spikelet number per hill.","subitem_description_type":"Abstract"}]},"item_4_publisher_30":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"三重大学生物資源学部"}]},"item_4_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0915-0471","subitem_source_identifier_type":"PISSN"}]},"item_4_source_id_9":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN10073846","subitem_source_identifier_type":"NCID"}]},"item_4_subject_16":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"616","subitem_subject_scheme":"NDC"}]},"item_4_text_18":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Fundamental Growth Response to Fertilizer in Rice Plants"}]},"item_4_text_63":{"attribute_name":"ノート","attribute_value_mlt":[{"subitem_text_value":"Agropedia提供データ"}]},"item_4_text_65":{"attribute_name":"資源タイプ（三重大）","attribute_value_mlt":[{"subitem_text_value":"Departmental Bulletin Paper / 紀要論文"}]},"item_4_version_type_15":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"江原, 宏","creatorNameLang":"ja"},{"creatorName":"Ehara, Hiroshi","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-02-18"}],"displaytype":"detail","filename":"AN100738460001001.pdf","filesize":[{"value":"3.4 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"AN100738460001001.pdf","url":"https://mie-u.repo.nii.ac.jp/record/5758/files/AN100738460001001.pdf"},"version_id":"8036b06b-eab5-48fc-99cf-ee3b9fb2e410"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Dry matter productivity","subitem_subject_scheme":"Other"},{"subitem_subject":"Fertilizer response","subitem_subject_scheme":"Other"},{"subitem_subject":"Leaf blade morphology","subitem_subject_scheme":"Other"},{"subitem_subject":"Nitrogen content","subitem_subject_scheme":"Other"},{"subitem_subject":"Rice","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"イネの対肥料反応性に関する研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"イネの対肥料反応性に関する研究","subitem_title_language":"ja"}]},"item_type_id":"4","owner":"13","path":["453"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2007-04-02"},"publish_date":"2007-04-02","publish_status":"0","recid":"5758","relation_version_is_last":true,"title":["イネの対肥料反応性に関する研究"],"weko_creator_id":"13","weko_shared_id":-1},"updated":"2023-10-12T03:02:06.082445+00:00"}