Paper · 1967 · Journal of Weed Science and Technology

Ecological Changes of Digitaria adscendens Henrald in Growing Wheat or Barley

Akio NAKAZAWA; Hiroshi SANO

9
claims
18
verbatim quotes
0
citations
2
research areas
✓
Open access

Abstract

採種後乾燥貯蔵した種子の発芽様相を検討した結果, (1) 室内乾燥貯蔵種子では, 光, 温度, 水分条件が十分であつても採種直後では発芽までに50日程度を要するが, 貯蔵日数が経過するにしたがい発芽までの日数が短かくなり, 発芽速度は早まる。(2) 低照度では休眠覚せいが遅延する傾向がある。(3) 高温処理は休眠覚せい効果が高く, 処理日数5日程度から覚せい効果がみられる。(4) 休眠覚せいがすすんだ種子の発芽には光の効果が顕著で, 給水後24時間程度経過後曝光処理すると, より有効である。(5) 休眠覚せい種子を曝光する場合, 照度40~40,000luxの範囲では, 曝光時間が短時間であると高照度の方が発芽が良好であるが, 一定時間以上になると照度間の差異は少なくなる。(6) 休眠覚せい種子でも曝光後の温度が発芽最低温度以下の場合は処理日数に比例して光の効果が消去され, 発芽が低下する。結局, メヒシバ種子の発芽における光の役割は, 休眠覚せいの促進作用としては決定的なものでははなく, 休眠覚せいのすすんだ種子の発芽には有効に作用する。間作条件におけるメヒシバ発生の要因を解析するには, 土中埋没種子の発芽性, 麦から溶出してくる物質の影響などを, 麦間作の環境条件の検討とともに行なう必要があるが,これらについては次の機会に報告したい。

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Claims 9

Observationobservedoriginal resultmeasured

Claim · model-written summary

Dry-stored seeds initially required about 50 days to germinate even with adequate light, temperature and water.

Taxon
Digitaria adscendensDigitaria adscendenst0
Outcome
発芽までに50日程度e0
Value
50日程度e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Digitaria adscendens
Digitaria adscendens · TaxonForest & Kim Starr · CC BY 3.0 · Wikimedia Commons ↗

Verbatim

e0

“室内乾燥貯蔵種子では, 光, 温度, 水分条件が十分であつても採種直後では発芽までに50日程度を要する”

✓ located verbatim in the source · abstract, characters 29–80 · show in text ↑
t0

“Digitaria adscendens”

✓ located verbatim in the source · title, characters 22–42 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Longer storage shortened time to germination and accelerated germination rate.

Taxon
Digitaria adscendensDigitaria adscendenst0
Treatment
貯蔵日数e0
Outcome
発芽までの日数e0
Direction
短かくなりe0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Digitaria adscendens
Digitaria adscendens · TaxonForest & Kim Starr · CC BY 3.0 · Wikimedia Commons ↗

Verbatim

e0

“貯蔵日数が経過するにしたがい発芽までの日数が短かくなり, 発芽速度は早まる。”

✓ located verbatim in the source · abstract, characters 83–121 · show in text ↑
t0

“Digitaria adscendens”

✓ located verbatim in the source · title, characters 22–42 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Germination rate accelerated with longer storage.

Taxon
Digitaria adscendensDigitaria adscendenst0
Treatment
貯蔵日数e0
Outcome
発芽速度e0
Direction
早まるe0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Digitaria adscendens
Digitaria adscendens · TaxonForest & Kim Starr · CC BY 3.0 · Wikimedia Commons ↗

Verbatim

e0

“貯蔵日数が経過するにしたがい発芽までの日数が短かくなり, 発芽速度は早まる。”

✓ located verbatim in the source · abstract, characters 83–121 · show in text ↑
t0

“Digitaria adscendens”

✓ located verbatim in the source · title, characters 22–42 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Low light tended to delay dormancy release.

Taxon
Digitaria adscendensDigitaria adscendenst0
Treatment
低照度e0
Outcome
休眠覚せいe0
Direction
遅延e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Digitaria adscendens
Digitaria adscendens · TaxonForest & Kim Starr · CC BY 3.0 · Wikimedia Commons ↗

Verbatim

e0

“低照度では休眠覚せいが遅延する傾向がある。”

✓ located verbatim in the source · abstract, characters 125–146 · show in text ↑
t0

“Digitaria adscendens”

✓ located verbatim in the source · title, characters 22–42 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

High temperature promoted dormancy release after about five days of treatment.

Taxon
Digitaria adscendensDigitaria adscendenst0
Treatment
高温処理e0
Outcome
休眠覚せい効果e0
Direction
高くe0
Value
5日程度e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Digitaria adscendens
Digitaria adscendens · TaxonForest & Kim Starr · CC BY 3.0 · Wikimedia Commons ↗

Verbatim

e0

“高温処理は休眠覚せい効果が高く, 処理日数5日程度から覚せい効果がみられる。”

✓ located verbatim in the source · abstract, characters 150–188 · show in text ↑
t0

“Digitaria adscendens”

✓ located verbatim in the source · title, characters 22–42 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Light exposure after about 24 hours of water supply was more effective for germination of dormancy-released seeds.

Taxon
Digitaria adscendensDigitaria adscendenst0
Treatment
給水後24時間程度経過後曝光処理e0
Outcome
種子の発芽e0
Direction
より有効e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Digitaria adscendens
Digitaria adscendens · TaxonForest & Kim Starr · CC BY 3.0 · Wikimedia Commons ↗

Verbatim

e0

“休眠覚せいがすすんだ種子の発芽には光の効果が顕著で, 給水後24時間程度経過後曝光処理すると, より有効である。”

✓ located verbatim in the source · abstract, characters 192–248 · show in text ↑
t0

“Digitaria adscendens”

✓ located verbatim in the source · title, characters 22–42 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

For short exposures, higher light intensity improved germination of dormancy-released seeds.

Taxon
Digitaria adscendensDigitaria adscendenst0
Treatment
高照度e0
Outcome
発芽e0
Direction
良好e0
Qualifier
曝光時間が短時間e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Digitaria adscendens
Digitaria adscendens · TaxonForest & Kim Starr · CC BY 3.0 · Wikimedia Commons ↗

Verbatim

e0

“照度40~40,000luxの範囲では, 曝光時間が短時間であると高照度の方が発芽が良好であるが, 一定時間以上になると照度間の差異は少なくなる。”

✓ located verbatim in the source · abstract, characters 268–341 · show in text ↑
t0

“Digitaria adscendens”

✓ located verbatim in the source · title, characters 22–42 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

After longer exposure, germination differed little across light intensities.

Taxon
Digitaria adscendensDigitaria adscendenst0
Outcome
照度間の差異e0
Direction
少なくなるe0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Digitaria adscendens
Digitaria adscendens · TaxonForest & Kim Starr · CC BY 3.0 · Wikimedia Commons ↗

Verbatim

e0

“一定時間以上になると照度間の差異は少なくなる。”

✓ located verbatim in the source · abstract, characters 318–341 · show in text ↑
t0

“Digitaria adscendens”

✓ located verbatim in the source · title, characters 22–42 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Below-minimum temperature after light exposure progressively erased the light effect and reduced germination.

Taxon
Digitaria adscendensDigitaria adscendenst0
Treatment
発芽最低温度以下e0
Outcome
発芽e0
Direction
低下するe0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Digitaria adscendens
Digitaria adscendens · TaxonForest & Kim Starr · CC BY 3.0 · Wikimedia Commons ↗

Verbatim

e0

“曝光後の温度が発芽最低温度以下の場合は処理日数に比例して光の効果が消去され, 発芽が低下する。”

✓ located verbatim in the source · abstract, characters 354–401 · show in text ↑
t0

“Digitaria adscendens”

✓ located verbatim in the source · title, characters 22–42 · show in text ↑