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Accueil du site → Doctorat → Allemagne → 2008 → Reducing irrigation water supply to accomplish the goal of designing sustainable cropping systems in the North China Plain

University of Hohenheim (2008)

Reducing irrigation water supply to accomplish the goal of designing sustainable cropping systems in the North China Plain

Binder, Jochen

Titre : Reducing irrigation water supply to accomplish the goal of designing sustainable cropping systems in the North China Plain

Auteur : Binder, Jochen

Université de soutenance : University of Hohenheim

Résumé
The research program was conducted in one of the most important economic and agricultural regions in China, the North China Plain (NCP). The NCP is one of the major maize (Zea mays L.) and wheat (Triticum aestivum L.) growing areas. A literature review indicated that over the last two decades yields for wheat and maize increased by more than 20%, which had mainly been achieved by augmenting the amount of irrigation water and fertilizer. Besides the positive effects on yield an increasing amount of these input factors leads to many environmental problems. Field experiments were carried out to compare different cropping systems. Currently, the double cropping of winter wheat and summer maize is the common cultivation system in the NCP. It consists of growing two crops mostly winter wheat and summer maize in one year. The winter wheat production depends on a supplemental irrigation, because rainfall is concentrated in the summer months during the maize growing season. An alternative to the intensive double cropping system could be the single cultivation of spring maize. Relative less irrigation water is required for spring maize production, because the rainy season coincides with the main part of the maize growing season. Due to the longer growing season spring maize normally realises higher yields in comparison to summer maize. However, the total yield of a double copping system of wheat and maize is higher. The evaluated system three harvests in two years (winter wheat and summer maize in the first year followed by spring maize in the second year) forms a balance between the double cropping system and the single cropping of spring maize.

Grade : Doktor der Agrarwissenschaften (Dr. sc. agr. / Ph. D. in Agricultural Sciences) 2008

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Page publiée le 11 mars 2009, mise à jour le 12 mai 2019