Investigating the Combined Effect of Tillage, Nitrogen Fertilization and Cover Crops on Nitrogen Use Efficiency in Winter Wheat

Agronomy

Bertrand Hirel¹  David Roger²  Hazzar Habbib²  Jérôme Lacoux²  Frédéric Dubois²  Julien Verzeaux²  Thierry Tétu²  Peter Lea³ 

[1] Adaptation des Plantes à leur Environnement, Unité Mixte de Recherche 1318, Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, Centre de Versailles-Grignon, R.D. 10, CEDEX F-78026 Versailles, France;Ecologie et Dynamique des Systèmes Anthropisés (EDYSAN, FRE 3498 CNRS UPJV), Laboratoire d’Agroécologie, Ecophysiologie et Biologie intégrative, Université de Picardie Jules Verne, 33 rue St Leu, CEDEX 80039 Amiens, France;Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK;

关键词: nitrogen use efficiency;    tillage system;    cover crops;    nitrogen application;    grain yield;    winter wheat;   

DOI  :  10.3390/agronomy7040066

来源: DOAJ

【 摘 要 】

A field study was conducted in northern France over two consecutive years to evaluate the combined effect of conventional tillage (CT) vs no till (NT) with or without cover crops (cc) and nitrogen (N) fertilization on various agronomic traits related to N use efficiency in winter wheat. Five years after conversion of CT to NT, significant increases in N use efficiency, N utilization efficiency, N agronomic efficiency, N partial factor productivity, N apparent recovery fraction and N remobilization were observed under three N fertilization regimes (0, 161, 215 kg ha−1). It was also observed that grain yield and grain N content were similar under CT and NT. The N nutrition index was higher under NT at the three rates of N fertilization. Moreover, N use efficiency related traits were increased in the presence of cc both under NT and CT. Thus, agronomic practices based on continuous NT in the presence of cc, appear to be promising strategies to increase N use efficiency in wheat, while reducing both the use and the loss of N-based fertilizers.

【 授权许可】

Unknown