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頁籤選單縮合
題 名 | 桃園地區1993年第二期作水稻增產與氣象因素之關係 |
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作 者 | 林孟輝; 張學琨; | 書刊名 | 桃園區農業改良場研究報告 |
卷 期 | 20 1995.03[民84.03] |
頁 次 | 頁1-9 |
分類號 | 434.111 |
關鍵詞 | 水稻; 氣象因素; 產量; 減數分裂期; 抽穗期; Rice; Climatic factor; Yield; Meiosis stage; Heading stage; |
語 文 | 中文(Chinese) |
中文摘要 | 本文旨在探討桃園地區1993年第二期作水稻產量比1985-1992年同期作高產之原因。利用8年期所收集之水稻豐歉試驗資料與該期生育期間之氣象資料,分析比較其氣象特徵。結果顯示,由於1993年第二期作自移植至幼穗分化期間之氣溫為27℃(比歷年平均低0.4℃),日射量為938.92MJ/m2(比歷年平均高19.63MJ/m2)下,分藥數大幅增加(台農67號多5.5支,新竹64號多4.8支):在抽穗期之減數分裂期間又因高溫(24.1℃)及較高日射量(68.93MJ/m2),導致稔實率顯著增加,台農67號為95.3%(指數+21.7%),新竹64號為94.8%(指數+19.2%);抽穗後又因雨量稀少且氣溫日照較高下,造成穀粒充實飽滿,台農67號及新竹64號千粒重為24.6g及24.5g,分別增加0.6g及1.8g。因穗數、稔實率及千粒重顯著增加,所以造成82年第二期作比歷年高產,台農67號增產100.6%,新竹64號增產92.2%,其增產幅度為本場成立以來所僅見。 |
英文摘要 | The objective of this study was to clarify the factors of the yield of the second crop of rice increaed particularly in 1993. Results indicated that yield increase of the second crop of the culti-vars Tainung 67 and Hsinchu 64 in 1993 were 100.6 to 92.2%, respectively, higher than that the average of 1985 to 1992. Based on the analyses of the climatic data obtained from the growth period of the second crop of rice in 1993, the increase in yield was due to the following factors :(1)The lower temperature(27℃) and higher solar radiation (938.92MJ/m2) during the period from date of trans-planting to 18th days before heading increased the panicle no. per panicle; (2) The higher temperature(24.1℃) and higher solar radiation ( 68.93 MJ/m2 ) during the heading stage were beneficial to pollination and fertility; (3) Low precipitation, higher temperature and higher solar radiation after the heading increased grain filling rates which consequently resulted in higher 1000-grain weight. |
本系統中英文摘要資訊取自各篇刊載內容。