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Ratooning as a management strategy for lodged or drought‐damaged rice crops

Rice (Oryza sativa L.) plants have the ability to develop ratoon tillers if the terminal growing point is lost, such as when the panicle has been aborted, matured, or harvested. We examined postharvest and midseason ratooning as management strategies for damaged rice crops, both in irrigated and rai...

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Autores principales: Torres, Rolando O., Natividad, Mignon A., Quintana, Marinell R., Henry, Amelia
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7282670/
https://www.ncbi.nlm.nih.gov/pubmed/32536700
http://dx.doi.org/10.1002/csc2.20007
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author Torres, Rolando O.
Natividad, Mignon A.
Quintana, Marinell R.
Henry, Amelia
author_facet Torres, Rolando O.
Natividad, Mignon A.
Quintana, Marinell R.
Henry, Amelia
author_sort Torres, Rolando O.
collection PubMed
description Rice (Oryza sativa L.) plants have the ability to develop ratoon tillers if the terminal growing point is lost, such as when the panicle has been aborted, matured, or harvested. We examined postharvest and midseason ratooning as management strategies for damaged rice crops, both in irrigated and rainfed conditions. Genotypic variation was observed in terms of postharvest ratoon tillering, midseason ratoon crop growth after lodging, and midseason ratoon crop growth after drought stress. The genotypic variation in postharvest ratoon tillering was related to stem carbohydrate levels at the time of main crop harvest and was affected by soil moisture levels at the time of main crop harvest. Drought‐tolerant varieties did not consistently show improved ratoon crop growth. After lodging, cutting stems at a height of 30 cm produced the highest numbers of ratoon tillers, and the contribution of the ratoon crop to the total harvestable grain yield was highest when the ratoon crop was initiated at earlier growth stages. The highest ratoon grain yields recovered from lodged crops ranged up to 3.58 t ha(−1). Total grain yield after drought was improved by trimming the leaves and panicles only in certain conditions and did not appear to be correlated with stem carbohydrate levels. These results suggest that management strategies may be recommended to farmers that exploit the ratooning ability of rice for improved recovery after midseason crop damage.
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spelling pubmed-72826702020-06-11 Ratooning as a management strategy for lodged or drought‐damaged rice crops Torres, Rolando O. Natividad, Mignon A. Quintana, Marinell R. Henry, Amelia Crop Sci ORIGINAL RESEARCH ARTICLES Rice (Oryza sativa L.) plants have the ability to develop ratoon tillers if the terminal growing point is lost, such as when the panicle has been aborted, matured, or harvested. We examined postharvest and midseason ratooning as management strategies for damaged rice crops, both in irrigated and rainfed conditions. Genotypic variation was observed in terms of postharvest ratoon tillering, midseason ratoon crop growth after lodging, and midseason ratoon crop growth after drought stress. The genotypic variation in postharvest ratoon tillering was related to stem carbohydrate levels at the time of main crop harvest and was affected by soil moisture levels at the time of main crop harvest. Drought‐tolerant varieties did not consistently show improved ratoon crop growth. After lodging, cutting stems at a height of 30 cm produced the highest numbers of ratoon tillers, and the contribution of the ratoon crop to the total harvestable grain yield was highest when the ratoon crop was initiated at earlier growth stages. The highest ratoon grain yields recovered from lodged crops ranged up to 3.58 t ha(−1). Total grain yield after drought was improved by trimming the leaves and panicles only in certain conditions and did not appear to be correlated with stem carbohydrate levels. These results suggest that management strategies may be recommended to farmers that exploit the ratooning ability of rice for improved recovery after midseason crop damage. John Wiley and Sons Inc. 2020-01-29 2020 /pmc/articles/PMC7282670/ /pubmed/32536700 http://dx.doi.org/10.1002/csc2.20007 Text en © 2019 The Authors. Crop Science published by Wiley Periodicals, Inc. on behalf of Crop Science Society of America This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle ORIGINAL RESEARCH ARTICLES
Torres, Rolando O.
Natividad, Mignon A.
Quintana, Marinell R.
Henry, Amelia
Ratooning as a management strategy for lodged or drought‐damaged rice crops
title Ratooning as a management strategy for lodged or drought‐damaged rice crops
title_full Ratooning as a management strategy for lodged or drought‐damaged rice crops
title_fullStr Ratooning as a management strategy for lodged or drought‐damaged rice crops
title_full_unstemmed Ratooning as a management strategy for lodged or drought‐damaged rice crops
title_short Ratooning as a management strategy for lodged or drought‐damaged rice crops
title_sort ratooning as a management strategy for lodged or drought‐damaged rice crops
topic ORIGINAL RESEARCH ARTICLES
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7282670/
https://www.ncbi.nlm.nih.gov/pubmed/32536700
http://dx.doi.org/10.1002/csc2.20007
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