Temperature: a major climatic determinant of cowpea production.

Cowpea planting season is crucial for high yield and should comprise the period of the year that warrants the best climatic conditions for cowpea cultivation. Thus, the objective of this study was to evaluate the influence of water availability and temperature on the performance of cowpea cultivars. A greenhouse experiment was conducted using a 4 × 2 × 5 factorial arrangement, with four replications. Factors included four levels of soil moisture (25, 50, 75, and 100% of water holding capacity), two growing seasons (mild and hot), and five cowpea cultivars (Carijó, Itaim, Pujante, Rouxinol, and Tapahium). The number of pods and seeds per plant, seed production, water use efficiency, shoot dry mass, root dry mass, and physiological parameters were evaluated. Seed production was higher during the mild season than during the hot season and increased linearly with increasing soil water availability. Photosynthetic activity and transpiration were higher during the hot season than during the mild season, with their reduction under a water availability of 25% regardless of the growing season. Total chlorophyll content decreased with excess water. Regardless of water availability, temperature was the most limiting climatic factor for cowpea performance. Cultivars Carijó, Itaim, and Tapahium exhibited a lower reduction in productive potential when grown in the hot season.

Bibliographic Details

Main Authors:	BARROS, J. R. A., GUIMARÃES, M. J. M., SIMOES, W. L., MELO, N. F. de, ANGELOTTI, F.
Other Authors:	JULIANE RAFAELE ALVES BARROS, Fundação de Amparo à Ciência e Tecnologia do Estado de Pernambuco; MIGUEL JULIO MACHADO GUIMARÃES, Instituto Federal de Educação, Ciência e Tecnologia do Maranhão; WELSON LIMA SIMOES, CPATSA; NATONIEL FRANKLIN DE MELO, CPATSA; FRANCISLENE ANGELOTTI, CPATSA.
Format:	Artigo de periódico biblioteca
Language:	Ingles English
Published:	2022-09-22
Subjects:	Déficit hídrico, Estresse térmico, Rendimento de sementes, Troca gasosa, Feijão-caupi., Feijão, Vigna Unguiculata, Semente., Soil water deficit, Thermal stress, Seed yield, Gas exchange, Vigna unguiculata subsp. unguiculata,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1146736
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