Journal article

Publication year: 2021

Journal: Field Crops Research

Volume number: 264

ISSN: 0378-4290

eISSN: 1872-6852

DOI Link: https://doi.org/10.1016/j.fcr.2021.108083

Publisher: Elsevier

Abstract: 
Designing cropping systems with low yield variability (or high yield stability) is becoming increasingly important because of the ongoing climatic and agronomic challenges. The trends in yield variability under various agronomic managements can be evaluated by conducting long-term experiments. By using a novel statistical analysis method, we estimated the long-term yield variability trends for winter wheat and spring barley grown in the Askov Long-term Experiment (Denmark) with different rates of mineral fertilizers (1/2, 1, and 11/2 NPK) and animal manure (1/2, 1, and 11/2 AM). Yield data from 1932 to 2019 were analyzed using a mixed model approach with restricted maximum likelihood (REML)-based parameter estimates. Across all nutrient treatments, winter wheat showed lower temporal yield variability than spring barley in the first decade. However, particularly, since 2006, the wheat yield variability trend increased mainly under treatments with higher NPK rates (1 and 11/2). Spring barley also showed an increasing trend in yield variability; however, compared to wheat, this trend was less pronounced. Therefore, wheat yields were less stable than barley yields during the last decade. Wheat and barley yields fluctuated more under higher NPK rates (1 and 11/2) than under a reduced rate (1/2 NPK). In general, animal manure provided more stable yields than NPK for wheat as well as for barley. The long-term trends in yield variability of cropping systems with winter wheat and spring barley were affected by the choice of crop, nutrient source and application rate, and increasing climatic variability.

Harvard Citation style: Macholdt, J., Hadasch, S., Piepho, H., Reckling, M., Taghizadeh-Toosi, A. and Christensen, B. (2021) Yield variability trends of winter wheat and spring barley grown during 1932-2019 in the Askov Long-term Experiment, Field Crops Research, 264, Article 108083. https://doi.org/10.1016/j.fcr.2021.108083

APA Citation style: Macholdt, J., Hadasch, S., Piepho, H., Reckling, M., Taghizadeh-Toosi, A., & Christensen, B. (2021). Yield variability trends of winter wheat and spring barley grown during 1932-2019 in the Askov Long-term Experiment. Field Crops Research. 264, Article 108083. https://doi.org/10.1016/j.fcr.2021.108083