Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → Pays-Bas → 2015 → Exploring options for improving water and nitrogen use efficiency in crop production systems

Wageningen University (2015)

Exploring options for improving water and nitrogen use efficiency in crop production systems

Qin, Wei

Titre : Exploring options for improving water and nitrogen use efficiency in crop production systems

Auteur : Qin, Wei

Université de soutenance : Wageningen University

Grade : Doctor 2015

Présentation
The main objective of this thesis research was ‘to increase the understanding of interactions between water and N use in crop production’. The specific objectives were (i) to analyse water and N use and their interactions in crop yields and in water and N use efficiencies (WUE and NUE), and (ii) to explore options for increasing crop yields and water and N use efficiencies simultaneously. In this thesis, I combined the use of literature review and meta-analysis, long-term field experiments and soil-crop modelling to quantify relationships between water and N use and their interactions in crop yields, WUE and NUE, and to explore options for improving the productivity and sustainability of two important and contrasting crop systems (i.e., annual cereal and perennial orange systems).

In arid and semi-arid regions, such as the Loess Plateau, I found that the water loss via soil evaporation was large as much as 60 to 70% of total rainfall and thereby significantly limited wheat yields. Soil mulching can effectively reduce soil evaporation thereby increasing crop yields by up to 60%. In sub-humid regions, the productivity and sustainability of rainfed wheat-soybean rotation systems can be constrained by soil fertility and other factors besides water and nutrient management.

Mots Clés : Agrarische productiesystemen, Agricultural production systems, Bodemkunde (algemeen), Crop production, Fertigatie, Fertigation, Gewasproductie, Mulchen, Mulching, Nitrogen, Nutriëntengebruiksefficiëntie, Nutrient use efficiency, Plant Production Systems, Plantaardige productiesystemen, Soil Science (General), Stikstof, Water use efficiency, Watergebruiksrendement

Lien vers le résumé de la thèse (DART)

Lien vers la version intégrale de la thèse

Page publiée le 5 septembre 2016, mise à jour le 14 décembre 2021