気象条件による日本の水稲収量構成要素の予測に関する研究 : I.登熱歩合と気象条件の関係   :   Studies for predicting the amount of each yield component in paddy rice by meteorological conditions in Japan. 

作成者 劉, 新安, 羽生, 寿郎, 中山, 敬一, 今, 久, 呉, 毅明
作成者 (ヨミ) ナカヤマ, ケイイチ, コン, ヒサシ
作成者の別表記 LIU, Xinan, HANYU, Juro, NAKAYAMA, Keiichi, KON, Hisashi, WU, Yiming
日本十進分類法 (NDC) 620
内容 水稲収量要素と気象要素との定量的関係を解析した報告は比較的少ないので, 出穂期を中心に生育期別の収量要素と気象のデータについて, 主成分分析, 重回帰分析, 曲線回帰分析などの手法を用いて登熟歩合と気象条件との関係を検討した.その結果, 東北地方の収量指数は登熟量によって左右されるが, 他の地方ではそういう傾向ははっきり見られなかった.登熟歩合は稔実粒数歩合と玄米粒教歩合との積からなり, 稔実粒数歩合の減少はときどき玄米粒数歩合と千粒重の増加によって補償されるので, 玄米粒数歩合は大切な収量構成要素と言える.したがって, 登熟歩合は主に玄米粒数歩合によって決定される.稔実粒数歩合と玄米粒数歩合はそれぞれ登熟の前期(出穂後10日ごろ)と中後期(出穂後20〜35日ごろ)の気象条件によって決定される.変数選択の重回帰分析に基づいて幾つかの最良な予測モデルを構築した.一例で検証した結果, 作物生育の前歴を含んでいる連続生理過程に係わる気象要素の積算値を採用したので, 予測のモデルは比較的安定し, 精度も比較的高いことが明らかとなった.そして半旬毎に予想の修正を行なうことが可能である.
To estimate the grain yield of paddy rice, the relationship between the percentage of ripened grain and the meteorological elements around the heading time was examined by the technics of principal component analysis, multiple regression analysis and curvilinear regression analysis. The routine crop experiment data, which contained the meteorological data obtained near the fields, by Statistics and Information Department of Ministry of Agriculture and Forestry from 1968 to 1982 were used for the analysis. The results are summarized as follows: 1) In the Tohoku district, it was confirmed that the yield index was dependent on the grade of ripening, In the other districts, however, there was no such a tendency on the yield index. 2) Although the percentage of ripened grain is the product of percentage ripening and percentage of brown rice, the decrease in percentage ripening is sometimes compensated by the increase in percentage of brown rice and thousand-kernel-weight. So it is concluded that percentage of brown rice is the most important yied component of paddy rice. 3) The important seasons which affect on the percentage ripening and the percentage of brown rice were about 10th day and 20th to 35th day after the heading time, respectively. 4) Some models to estimate the percentage of ripened grain were constructed by the multiple regression analysis with stepwise method. The test of the models by using the data set in some districts showed that the models brought about the good estimations with fairly high accuracy and stability.

公開者 千葉大学園芸学部
コンテンツの種類 紀要論文 Departmental Bulletin Paper
DCMI資源タイプ text
ファイル形式 application/pdf
ISSN 0069-3227
NCID AN00142658
掲載誌情報 千葉大学園芸学部学術報告 Vol.41 page.7-14 (19880318)
情報源 The technical bulletin of Faculty of Horticulture, Chiba University
言語 日本語
著者版フラグ publisher

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