Erwerbs-Obstbau ( IF 1.3 ) Pub Date : 2022-04-27 , DOI: 10.1007/s10341-022-00679-6 Salahaddin Maslahati Fard , Hamid Hassanpour
Excessive use of chemical fertilizers in agricultural production, especially in hydroponic cultivation, wastes fertilizer and water and thus increases production costs. Therefore, reducing the amount of nutrient solution in greenhouse production systems is essential. This study aimed to evaluate the effect of glutamic acid on strawberries under deficit fertigation conditions. In the present study, different concentrations of glutamic acid (0, 200 mg/l, and 300 mg/l) were sprayed on strawberry cv. Albion under deficit fertigation conditions (100 ml, 140 ml, and 180 ml) based on a completely randomized design with four replications to evaluate the yield and phytochemical characteristics of fruits. The obtained results showed that glutamic acid increased the yield at all levels of fertigation. The highest yield (550.5 g) was recorded in the plants that received 180 ml of nutrient solution with glutamic acid (300 mg/l). Most of the parameters measured in response to the normal fertigation (180 ml) decreased, and glutamic acid ameliorated these adverse effects. The highest amounts of total flavonoids (139.45 mg quercetin per 100 g FW), antioxidant capacity (94.68%), and catalase enzyme activity (4.32 units g/min) were recorded in plants treated with severe deficit fertigation (100 ml). Also, the highest amount of total anthocyanin (38.58 mg cyanidin-3-glucoside per 100 g FW) and ascorbate peroxidase enzyme activity (13.68 µmol per min/v g FW) was observed with mild deficit fertigation treatment (140 ml). In conclusion, the results showed that increasing the fruit quality and yield of strawberries grown in hydroponic conditions is possible with deficit fertigation and glutamic acid treatments.
中文翻译:
谷氨酸提高缺水施肥条件下草莓(Fragaria × ananassa)的产量和植物化学性质
农业生产,特别是水耕栽培中过量使用化肥,浪费了化肥和水,增加了生产成本。因此,减少温室生产系统中的营养液用量至关重要。本研究旨在评估缺乏施肥条件下谷氨酸对草莓的影响。在本研究中,将不同浓度的谷氨酸(0、200 mg/l 和 300 mg/l)喷洒在草莓品种上。Albion 在亏缺施肥条件下(100 毫升、140 毫升和 180 毫升)基于完全随机设计,具有四次重复,以评估水果的产量和植物化学特征。所得结果表明,谷氨酸在各个施肥水平下均提高了产量。最高产量(550. 在接受 180 ml 谷氨酸 (300 mg/l) 营养液的植物中记录到 5 g)。响应于正常施肥(180 ml)测量的大多数参数都降低了,谷氨酸改善了这些不利影响。在严重亏缺施肥(100 ml)处理的植物中,总黄酮含量最高(每 100 g FW 139.45 mg 槲皮素)、抗氧化能力(94.68%)和过氧化氢酶活性(4.32 单位 g/min)。此外,在轻度亏缺施肥处理(140 ml)下,总花青素(每 100 g FW 38.58 mg cyanidin-3-glucoside)和抗坏血酸过氧化物酶活性(13.68 µmol/min/vg FW)最高。综上所述,