Kraokaw, S.

Responses of open-pollinated and hybrid maize cultivars to N & P fertilization during recovery from drought stress - Los Baños, Laguna (Philippines) PCARRD : 2000 - p. 381-384 - Printed

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


Agricultural economics
Crops
Drug plants
Fertilizers
Fields
Maize
Pollination
Seed production
Thailand
Hybrids
Plant breeding

CIMMYT
baner

International Maize and Wheat Improvement Center (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
If you have any question, please contact us at CIMMYT-Knowledge-Center@cgiar.org

Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org