Razmjooei Zahra, Etemadi Mohammad, Eshghi Saeid, Ramezanian Asghar, Mirazimi Abarghuei Faezeh, Alizargar Javad
Department of Horticultural Science, School of Agriculture, Shiraz University, Shiraz 71441-65186, Iran.
Research Center for Healthcare Industry Innovation, National Taipei University of Nursing and Health Sciences, Taipei 112, Taiwan.
Plants (Basel). 2022 Feb 1;11(3):406. doi: 10.3390/plants11030406.
Vegetables can be treated with biofertilizers as an alternative to chemical fertilizers because of their low toxicity. We investigated the effects of foliar spraying of under different levels of nitrogen (100, 150 and 200 mg/L in nutrient solution) on the growth, nutritional value, nitrate accumulation and antioxidant enzyme activities of hydroponically grown lettuce. The experiment was laid out in a completely randomized design with four replicates in a factorial combination. Plants treated with and 200 mg/L nitrogen had greater leaf area and photosynthetic pigments than plants treated with 200 mg/L nitrogen without spraying with . Increasing nitrogen levels increased leaf number, fresh and dry weights, leaf area and nitrate accumulation in lettuce plants. Peroxidase (POD) activity increased by 95.4% at a nitrogen level of 200 mg/L compared to a nitrogen level of 100 mg/L. Ascorbate peroxidase (APX) activity and leaf phosphorous (P) and potassium (K) concentrations were the highest in plants treated with a nitrogen source of 100 mg/L without foliar application of . As nitrogen levels increased in all treatments, nitrate reductase (NR) activity decreased and reached a minimum at the 200 mg/L nitrogen level. In general, foliar application of sp. can be used to promote plant growth and reduce nitrate accumulation in lettuce.
由于生物肥料毒性低，蔬菜可用其替代化学肥料。我们研究了在不同氮水平（营养液中为100、150和200毫克/升）下叶面喷施[未提及具体物质]对水培生菜生长、营养价值、硝酸盐积累和抗氧化酶活性的影响。实验采用完全随机设计，以析因组合方式进行四次重复。与未喷施[未提及具体物质]且氮水平为200毫克/升的植株相比，喷施[未提及具体物质]且氮水平为200毫克/升的植株叶面积和光合色素含量更高。增加氮水平会使生菜植株的叶片数、鲜重和干重、叶面积以及硝酸盐积累量增加。与氮水平为100毫克/升相比，氮水平为200毫克/升时过氧化物酶（POD）活性提高了95.4%。在未进行叶面喷施且氮源为100毫克/升处理的植株中，抗坏血酸过氧化物酶（APX）活性以及叶片磷（P）和钾（K）浓度最高。在所有处理中，随着氮水平增加，硝酸还原酶（NR）活性降低，在氮水平为200毫克/升时降至最低。总体而言，叶面喷施[未提及具体物质]菌株可用于促进生菜生长并减少其硝酸盐积累。
