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Stability analysis for grain yield of winter wheat in a long-term field experiment

机译：长期田间实验中冬小麦籽粒产量的稳定性分析

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摘要

The current study is based on a long-term field experiment that was conducted at the Rauischholzhausen field station of the University of Giessen (Germany). It includes six different crop rotation systems (CRSs), three mineral nitrogen (N) fertilization treatments and the varying annual weather conditions (AWCs) over 25 years (1993-2017). To ensure new insight into wheat cropping systems that have high yield stability, the dataset was assessed using different methods of stability analysis, including eco-valence, biplot and risk analysis. The results show that the factors which influence grain yield variation in winter wheat can be ranked in the following order: (1) N fertilization; (2) AWC; and (3) CRS. Compared to winter rye as the preceding cereal crop, field bean as the preceding legume crop had a clearly positive effect on the grain yield stability of winter wheat. Furthermore, the higher N fertilization level led to more stable grain yields of winter wheat for all investigated CRSs. Overall, in this study, crop rotation and N fertilization had a high impact on the yield stability of winter wheat. These are important factors to consider in agronomic management decisions under the increasingly difficult environmental conditions caused by climate change.
机译：目前的研究是基于长期野外实验，该实验是在Giessen大学的Rauischholzhausen站进行的。它包括六种不同的作物旋转系统（CRS），三种矿物氮（N）施肥治疗以及25年（1993-2017）的不同年度天气条件（AWC）。为了确保新的洞察较高的屈服稳定性的小麦种植系统，使用不同的稳定性分析方法评估数据集，包括生态价，双针和风险分析。结果表明，影响冬小麦籽粒产量变化的因素可以按以下顺序排列：（1）施肥; （2）AWC; （3）CRS。与冬季黑麦相比，作为前面的谷物作物，田豆作为前面的豆科作物对冬小麦的粮食产量稳定性显着积极影响。此外，较高的抗施肥水平导致所有调查的CRS的冬小麦的颗粒产量更稳定。总体而言，在本研究中，作物旋转和氮肥对冬小麦的产量稳定性产生了很高的影响。这些是在气候变化越来越困难的环境条件下在农艺管理决策中考虑的重要因素。

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