文章基本信息

标题：Suivi de l’état hydrique du sol et de la température du couvert de maïs au Sénégal
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作者：Benoît Sarr ; Omar Diouf ; Macoumba Diouf 等
期刊名称：Science et changements planétaires / Sécheresse
印刷版ISSN：1147-7806
电子版ISSN：1777-5922
出版年度：1999
卷号：10
期号：2
页码：129-135
出版社：John Libbey Eurotext
摘要：Authors Benoît Sarr , Omar Diouf , Macoumba Diouf , Harold Roy-Macauley , Sylvain Ndjendole CERAAS/CORAF/ISRA, BP 3320, Thiès Escale, Sénégal, ICRA, BP 122, Bangui, République centrafricaine. Page(s) : 129-35 Published in: 1999 In Senegal, maize ( Zea mays L.) is cultivated in different agroclimatic zones. Under rainfed conditions, south of the 600-700 mm isohyet, maize cultivation is limited by water deficit periods during the rainy season. Under irrigated conditions, maize is mainly grown in the Senegal River valley. In this context, assessment of the response of maize to drought and water resources management are essential for optimizing maize production. In the present study, water stress was applied at different maize phenological stages under field conditions. The study was aimed at comparing different indicators of soil and crop water stress level that could be used as tools for scheduling irrigation, and at determining stages in the maize growth cycle when water deficit is most crucial. The results highlighted that a 40-50% decrease in ASW, corresponding to a 75% TSAT, induced a rapid increase in CWSI. Grain yields of > 4 t/ha were obtained when the CWSI level at flowering was < 0.27. By integrating these parameters, a CWSI of 0.27 was calculated as the threshold level for early irrigation scheduling concerning the Synthetic-C maize variety.