Effect of tillage and burial depth and density of seed on viability and seedling emergence of weedy rice
Weedy rice (Oryza sativa f. spontanea) is one of the three worst paddy weeds in most rice growing areas. The unexpected heavy infestation is derived from a persistence of soil seed bank of weedy rice, which the shattered seeds chiefly feed back to. Information on soil seed bank dynamics is imperativ...
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| Format: | Article |
| Language: | English |
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Elsevier
2019-08-01
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| Series: | Journal of Integrative Agriculture |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095311919625839 |
| _version_ | 1819108138640474112 |
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| author | Zheng ZHANG Ping-lei GAO Wei-min DAI Xiao-ling SONG Feng HU Sheng QIANG |
| author_facet | Zheng ZHANG Ping-lei GAO Wei-min DAI Xiao-ling SONG Feng HU Sheng QIANG |
| author_sort | Zheng ZHANG |
| collection | DOAJ |
| description | Weedy rice (Oryza sativa f. spontanea) is one of the three worst paddy weeds in most rice growing areas. The unexpected heavy infestation is derived from a persistence of soil seed bank of weedy rice, which the shattered seeds chiefly feed back to. Information on soil seed bank dynamics is imperative to predict the infestation of weeds. In the present paper, the effect of rotary tillage on weedy rice seed bank structure was studied first, and a burial experiment of marked seeds was conducted to observe the overwintering survival, seed viability and seedling emergence of weedy rice. The results showed that the proportion of weedy rice seeds in deeper soil increased but seedling emergence decreased with increasing plowing depth. The viability of weedy rice seeds decreased as the burial duration time extended but more slowly in deeper soil layers. Additionally, there was no significant effect of burial density on seed viability. Moreover, the logistic model fitted well (R2≥0.95, P≤0.01) with the depressive trends of seed viability with increasing burial time under all burial depths and densities which can provide us further information about seed survival. In field experiments, number of seedling emergence significantly decreased as seed burial depth increased, conversely, proportion of seedling emergence increased as seed burial density decreased. This study has important implications for determining strategies for weedy rice management by exhausting its seed bank through the alteration of tillage practices. |
| first_indexed | 2024-12-22T03:05:10Z |
| format | Article |
| id | doaj.art-492d3cea0fac4fc6a9e0532fd466785d |
| institution | Directory Open Access Journal |
| issn | 2095-3119 |
| language | English |
| last_indexed | 2024-12-22T03:05:10Z |
| publishDate | 2019-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Integrative Agriculture |
| spelling | doaj.art-492d3cea0fac4fc6a9e0532fd466785d2022-12-21T18:41:04ZengElsevierJournal of Integrative Agriculture2095-31192019-08-0118819141923Effect of tillage and burial depth and density of seed on viability and seedling emergence of weedy riceZheng ZHANG0Ping-lei GAO1Wei-min DAI2Xiao-ling SONG3Feng HU4Sheng QIANG5Weed Research Laboratory, Nanjing Agricultural University, Nanjing 210095, P.R.China; ZHANG Zheng, Tel: +86-25-84395117Weed Research Laboratory, Nanjing Agricultural University, Nanjing 210095, P.R.ChinaWeed Research Laboratory, Nanjing Agricultural University, Nanjing 210095, P.R.ChinaWeed Research Laboratory, Nanjing Agricultural University, Nanjing 210095, P.R.ChinaCollege of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, P.R.ChinaWeed Research Laboratory, Nanjing Agricultural University, Nanjing 210095, P.R.China; Correspondence QIANG Sheng, Tel/Fax: +86-25-84395117Weedy rice (Oryza sativa f. spontanea) is one of the three worst paddy weeds in most rice growing areas. The unexpected heavy infestation is derived from a persistence of soil seed bank of weedy rice, which the shattered seeds chiefly feed back to. Information on soil seed bank dynamics is imperative to predict the infestation of weeds. In the present paper, the effect of rotary tillage on weedy rice seed bank structure was studied first, and a burial experiment of marked seeds was conducted to observe the overwintering survival, seed viability and seedling emergence of weedy rice. The results showed that the proportion of weedy rice seeds in deeper soil increased but seedling emergence decreased with increasing plowing depth. The viability of weedy rice seeds decreased as the burial duration time extended but more slowly in deeper soil layers. Additionally, there was no significant effect of burial density on seed viability. Moreover, the logistic model fitted well (R2≥0.95, P≤0.01) with the depressive trends of seed viability with increasing burial time under all burial depths and densities which can provide us further information about seed survival. In field experiments, number of seedling emergence significantly decreased as seed burial depth increased, conversely, proportion of seedling emergence increased as seed burial density decreased. This study has important implications for determining strategies for weedy rice management by exhausting its seed bank through the alteration of tillage practices.http://www.sciencedirect.com/science/article/pii/S2095311919625839seed burial depthseed burial densitygerminationwintering survivalseed vertical distribution |
| spellingShingle | Zheng ZHANG Ping-lei GAO Wei-min DAI Xiao-ling SONG Feng HU Sheng QIANG Effect of tillage and burial depth and density of seed on viability and seedling emergence of weedy rice Journal of Integrative Agriculture seed burial depth seed burial density germination wintering survival seed vertical distribution |
| title | Effect of tillage and burial depth and density of seed on viability and seedling emergence of weedy rice |
| title_full | Effect of tillage and burial depth and density of seed on viability and seedling emergence of weedy rice |
| title_fullStr | Effect of tillage and burial depth and density of seed on viability and seedling emergence of weedy rice |
| title_full_unstemmed | Effect of tillage and burial depth and density of seed on viability and seedling emergence of weedy rice |
| title_short | Effect of tillage and burial depth and density of seed on viability and seedling emergence of weedy rice |
| title_sort | effect of tillage and burial depth and density of seed on viability and seedling emergence of weedy rice |
| topic | seed burial depth seed burial density germination wintering survival seed vertical distribution |
| url | http://www.sciencedirect.com/science/article/pii/S2095311919625839 |
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