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Responses of open-pollinated and hybrid maize cultivars to N & P fertilization during recovery from drought stress

By: Kraokaw, S | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico, DF (Mexico) | 7, Proceedings of the Asian Regional Maize Workshop Los Baños (Philippines) 23-27 Feb 1998.
Contributor(s): Chinchet, A [coaut.] | Vasal, S.K.|Gonzalez Ceniceros, F.|XiongMing, F [eds.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Los Baños, Laguna (Philippines) PCARRD : 2000Description: p. 381-384.Subject(s): Agricultural economics | Crops | Drug plants | Fertilizers | Fields | Maize | Pollination | Seed production | Thailand | CIMMYT | Hybrids AGROVOC | Plant breeding AGROVOCSummary: A glasshouse study was conducted in 1993 to measure the response of applying 90 kg/ha of nitrogen (N), or phosphorus (P) at the start of recovery from drought stress in the open pollinated varieties Suwan 1 and Nakhon Sawan I, and the Pioneer hybrid 3264, which were subjected to limited water supply from 15 to 29 days after emergence (DAB). In a separate field study conducted in 1996, the cultivars Nakhon Sawan 1 and Pioneer 3012 were subjected to drought by limiting and withholding water supply from 7 to 35 DAB. At the start of the recovery period, 90 kg/ha of N, P, or a combination of both nutrients were applied to measure the drought recovery response after fertilization with these nutrients. Drought resulted in a reduction in growth, dry mass (DM) production and N concentrations in parts of plants grown in pots (at 29 DAB), as well as a reduction in P concentrations of above ground parts of maize plants in field trial (at 35 DAB) .Nitrogen and P fertilization resulted in an increase in N and P concentrations in plant parts at 53 DAB, and in water use efficiency and growth of maize plants in pots during a recovery period. Application of N + P fertilizers could restore growth and grain yields of maize crops which had experienced drought stresses in the field.Collection: CIMMYT Publications Collection
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A glasshouse study was conducted in 1993 to measure the response of applying 90 kg/ha of nitrogen (N), or phosphorus (P) at the start of recovery from drought stress in the open pollinated varieties Suwan 1 and Nakhon Sawan I, and the Pioneer hybrid 3264, which were subjected to limited water supply from 15 to 29 days after emergence (DAB). In a separate field study conducted in 1996, the cultivars Nakhon Sawan 1 and Pioneer 3012 were subjected to drought by limiting and withholding water supply from 7 to 35 DAB. At the start of the recovery period, 90 kg/ha of N, P, or a combination of both nutrients were applied to measure the drought recovery response after fertilization with these nutrients. Drought resulted in a reduction in growth, dry mass (DM) production and N concentrations in parts of plants grown in pots (at 29 DAB), as well as a reduction in P concentrations of above ground parts of maize plants in field trial (at 35 DAB) .Nitrogen and P fertilization resulted in an increase in N and P concentrations in plant parts at 53 DAB, and in water use efficiency and growth of maize plants in pots during a recovery period. Application of N + P fertilizers could restore growth and grain yields of maize crops which had experienced drought stresses in the field.

English

0208|AGRIS 0201|AL-Maize Program|R01PROCE

Juan Carlos Mendieta

CIMMYT Publications Collection

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