Matías Javier, Cruz Verónica, Reguera María
Agrarian Research Institute "La Orden-Valdesequera" of Extremadura (CICYTEX), 06187 Badajoz, Spain.
Department of Biology, Universidad Autónoma de Madrid, c/Darwin 2, Campus de Cantoblanco, 28049 Madrid, Spain.
Plants (Basel). 2021 May 11;10(5):955. doi: 10.3390/plants10050955.
Quinoa ( Willd.) is receiving increasing attention globally due to the high nutritional value of its seeds, and the ability of this crop to cope with stress. In the current climate change scenario, valorization of crop byproducts is required to support a climate-smart agriculture. Furthermore, research works characterizing and evaluating quinoa stems and their putative uses are scarce. In this work, straw yield and composition, and the relative feed value of five quinoa varieties, were analyzed in two consecutive years (2017-2018) under field conditions in Southwestern Europe. High temperatures were recorded during the 2017 growing season resulting in significantly decreased straw yield and improved feed value, associated with compositional changes under elevated temperatures. Crude protein, ash, phosphorus, and calcium contents were higher under high temperatures, whereas fiber contents decreased. The relative feed value was also higher in 2017 and differed among varieties. Differences among varieties were also found in straw yield, and contents of phosphorus, potassium, and calcium. Overall, the results presented here support a sustainable quinoa productive system by encouraging straw valorization and shedding light on the mechanisms underlying heat-stress responses in this crop.
藜麦（Chenopodium quinoa Willd.）因其种子的高营养价值以及该作物应对胁迫的能力而在全球受到越来越多的关注。在当前气候变化的背景下，需要对作物副产品进行增值利用以支持气候智能型农业。此外，对藜麦茎秆及其潜在用途进行表征和评估的研究工作很少。在这项研究中，于欧洲西南部的田间条件下，连续两年（2017 - 2018年）分析了五个藜麦品种的秸秆产量、成分以及相对饲料价值。2017年生长季节记录到高温，导致秸秆产量显著下降但饲料价值提高，这与高温下的成分变化有关。高温下粗蛋白、灰分、磷和钙含量较高，而纤维含量降低。2017年相对饲料价值也较高，且品种间存在差异。在秸秆产量以及磷、钾和钙含量方面也发现了品种间差异。总体而言，本文呈现的结果通过鼓励秸秆增值利用并揭示该作物热应激反应的潜在机制，支持了可持续的藜麦生产系统。
