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  1. INDEX:組織別
  2. 農研機構 中日本農業研究センター
  3. 研究報告
  4. 中央農研研報
  5. 5号

関東黒ボク土地帯における主要一年生畑夏雑草の定量的発生予測

https://doi.org/10.24514/00001516
https://doi.org/10.24514/00001516
cd923174-6761-4282-97a6-8984ebb482c1
名前 / ファイル ライセンス アクション
narc_report_No5p23-58p.pdf narc_report_No5p23-58p.pdf (263.9 kB)
Item type 紀要論文01 / Departmental Bulletin Original Article(1)
公開日 2019-03-22
タイトル
タイトル 関東黒ボク土地帯における主要一年生畑夏雑草の定量的発生予測
タイトル
タイトル Quantitatively Predicting Seedling Emergence in Summer Annual Upland Weeds in Kanto Region Kuroboku Soil
言語 en
言語
言語 jpn
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ departmental bulletin paper
ID登録
ID登録 10.24514/00001516
ID登録タイプ JaLC
著者 高柳, 繁

× 高柳, 繁

高柳, 繁

ja-Kana タカヤナギ, シゲル

en TAKAYANAGI, Shigeru

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抄録
内容記述タイプ Abstract
内容記述 Predicting weed seedling emergence is essential in integrated weed management. We developed ways to predict quantitative seedling emergence and simulation model for seasonal emergence patterns of several weed species. We must be able to predict, reasonably accurately, species composition and seedling density from seed reserves in soil sampled just after cultivation. Theoretical calculations indicate it is necessary to collect 30 or 15 soil cores, each of 5.1 cm in diameter by 5 cm deep (100 ml) or 8 cm in diameter by 4 cm deep (200 ml), in each field. Weed seeds were separated from soil using a proprietary apparatus based on float-selection : it was operated 5 to 10 minutes per soil sample. Based on the core size of soil samples, viable seed numbers and emergence depth of species, we derived the following formula to predict potential numbers of seedling emergence. y=(1/P)(ΣAi/(F/G))(1±U)x where y is the annual potential number of emerged seedlings of a given weed species (plants m^-2) after cultivation, x is the viable seed numbers of a given weed species in a soil cores of P m^2 surface area and H cm depth, Ai is the average emergence of a species in the ith layer of soil divided into G cm layers from the soil surface, and U is the reliability range, i.e., usually 0.50. In general, we gained good agreement between predictions by the above formula and observations in the annual potential number of emerged seedlings of 8 weed species. Independently of the above methods, a model using air temperature and soil moisture was developed to simulate the seasonal emergence pattern of 6 weed species based on the following equations: Y=1/(1+k・exp(-λ・lnX)) X=Σxi X=a(TM-T0)・b(WS-W0) If TM>=25 then TM=25, If WS>=65 then WS=65, If TM<T0 or WS<W0 then x=0 where Y is the accumulated emergence (0<Y<1), X is the daily accumulated values of emergence equivalent (x), i is the ith day after cultivation, TM is the daily mean temperature (℃), WS is the daily soil moisture content (water % / dry soil), and To, Wo, a, b, λ and k are parameters. The value of parameters was determined by the Simplex Method based on data on field experiments in which 14 different cultivated dates were selected for 4 years. Good fitness was gained between simulations and observations in seasonal emergence patterns of 6 weed species for different cultivated dates. We combined these methods and the model to predict the quantitative emergence of a given weed species at an optional point in time after cultivation. Based on these, we will construct integrated weed management.
書誌情報 中央農業総合研究センター研究報告
en : Bulletin of the National Agricultural Research Center

巻 5, p. 23-58, 発行日 2004-08-01
出版者
出版者 独立行政法人 農業・生物系特定産業技術研究機構 中央農業総合研究センター
ISSN
収録物識別子タイプ ISSN
収録物識別子 1881-6738
DOI
関連タイプ isIdenticalTo
識別子タイプ DOI
関連識別子 10.24514/00001516
著者版フラグ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
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Cite as

TAKAYANAGI, Shigeru, 2004, Quantitatively Predicting Seedling Emergence in Summer Annual Upland Weeds in Kanto Region Kuroboku Soil: 独立行政法人 農業・生物系特定産業技術研究機構 中央農業総合研究センター, 23–58 p.

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