Department of Botany, University of Agriculture, Faisalabad, 38040, Pakistan.
National Agricultural Research Centre, Islamabad, 45500, Pakistan.
Plant Physiol Biochem. 2022 Jul 1;182:1-10. doi: 10.1016/j.plaphy.2022.04.012. Epub 2022 Apr 18.
Modern agriculture is primarily concerned with enhanced productivity of field crops linked with maximum resources use efficiency to feed the increasing population of the world. Exogenous application of biostimulants is considered a sustainable and ecofriendly approach to improve the growth and productivity of agronomic and horticultural field crops. The present study was carried out to explore the comparative growth enhancing potential of plant biostimulants (moringa leaf extract at 3% and sorghum water extract at 3%) and synthetic growth promoters (ascorbic acid at 500 μM and hydrogen peroxide at 100 μM) on growth, productivity and quality of quinoa crop (cultivar UAF-Q7) because it has gained significant popularity among agricultural scientists and farmers throughout the world due to its high nutritional profile. A field experiment was carried out at the Research Area of Directorate of Farms, University of Agriculture, Faisalabad, Pakistan during quinoa cultivation season of 2016-2017 and repeated during next year (2017-2018). All the foliar treatments enhanced the physiological, biochemical, quality, growth and yield attributes of quinoa as compared to control group. However, maximum improvement was observed in chlorophyll a and b contents, photosynthesis and respiration rates, and water use efficiency by moringa leaf extract (MLE) application. MLE application was also found more responsive regarding the improvement in activities of peroxidase, catalase, superoxide dismutase, phenolics and glycine betaine as compared to other treatments. Mineral elements i.e. K, Ca and N in root as well as in shoot were found the highest in response to MLE application. Similarly, growth (plant fresh and dry biomass, plant length and grain yield) and grain quality parameters (protein, K and Ca) were also significantly enhanced. Application of MLE was found to be a viable approach to improve the growth and quality of produce as compared to synthetic compounds.
现代农业主要关注提高大田作物的生产力，同时最大限度地提高资源利用效率，以满足世界不断增长的人口的需求。外源施用生物刺激素被认为是一种可持续和环保的方法，可提高农业和园艺大田作物的生长和生产力。本研究旨在探索植物生物刺激素（3%辣木叶提取物和 3%高粱水提取物）和合成生长促进剂（500 μM 抗坏血酸和 100 μM 过氧化氢）对藜麦作物（品种 UAF-Q7）生长、生产力和品质的比较促进作用，因为由于其高营养价值，它在世界各地的农业科学家和农民中获得了很高的知名度。本研究于 2016-2017 年在巴基斯坦费萨拉巴德农业大学农场总局的研究区进行了田间试验，并于次年（2017-2018 年）重复进行。与对照组相比，所有叶面处理都提高了藜麦的生理、生化、品质、生长和产量特性。然而，与其他处理相比，辣木叶提取物（MLE）的应用使叶绿素 a 和 b 含量、光合作用和呼吸速率以及水分利用效率得到了最大的提高。与其他处理相比，MLE 处理在提高过氧化物酶、过氧化氢酶、超氧化物歧化酶、酚类和甘氨酸甜菜碱的活性方面也更为敏感。根和茎中 K、Ca 和 N 等矿物质元素的含量也最高，这与 MLE 的应用有关。同样，生长（植物鲜重和干重、植物长度和籽粒产量）和籽粒品质参数（蛋白质、K 和 Ca）也得到了显著提高。与合成化合物相比，MLE 的应用被认为是提高作物生长和品质的可行方法。
