Hannachi Sami, Signore Angelo, Mechi Lassaad
Department of Biology, College of Science, University of Hail, P.O. Box 2440, Ha'il 81451, Saudi Arabia.
Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium.
Plants (Basel). 2023 Mar 21;12(6):1399. doi: 10.3390/plants12061399.
To investigate the impact of biochar on eggplant growth, physiology, and yield parameters under separate and associated drought and salt stress, a pot experiment was carried out. An eggplant variety ('Bonica F1') was exposed to one NaCl concentration (S1 = 300 mM), three irrigation regimes (FI: full irrigation; DI: deficit irrigation; ARD: alternate root-zone drying irrigation), and one dose of biochar (B1 = 6% by weight). Our findings demonstrated that associated drought and salt stress had a greater negative impact on 'Bonica F1' performance in comparison to single drought or salt stress. Whereas, adding biochar to the soil improved the ability of 'Bonica F1' to alleviate the single and associated effects of salt and drought stress. Moreover, in comparison to DI under salinity, biochar addition in ARD significantly increased plant height, aerial biomass, fruit number per plant, and mean fresh weight per fruit by 18.4%, 39.7%, 37.5%, and 36.3%, respectively. Furthermore, under limited and saline irrigation, photosynthetic rate (A), transpiration rate (E), and stomatal conductance (g) declined. In addition, the interaction between ARD and biochar effectively restored the equilibrium between the plant chemical signal (ABA) and hydraulic signal (leaf water potential). As a result, mainly under salt stress, with ARD treatment, intrinsic water use efficiency (WUE) and yield traits were much higher than those in DI. Overall, biochar in combination with ARD could be an efficient approach for preserving crop productivity.
为了研究生物炭对单独及联合干旱和盐胁迫下茄子生长、生理及产量参数的影响，进行了一项盆栽试验。将一个茄子品种（‘博尼卡F1’）暴露于一种NaCl浓度（S1 = 300 mM）、三种灌溉方式（FI：充分灌溉；DI：亏缺灌溉；ARD：交替根区干燥灌溉）和一种生物炭剂量（B1 = 6%重量比）下。我们的研究结果表明，与单一干旱或盐胁迫相比，联合干旱和盐胁迫对‘博尼卡F1’的表现具有更大的负面影响。然而，向土壤中添加生物炭提高了‘博尼卡F1’缓解盐和干旱胁迫单一及联合影响的能力。此外，与盐度下的DI相比，在ARD中添加生物炭显著提高了株高、地上部生物量、单株果实数和单果平均鲜重，分别提高了18.4%、39.7%、37.5%和36.3%。此外，在有限和盐分灌溉条件下，光合速率（A）、蒸腾速率（E）和气孔导度（g）下降。此外，ARD与生物炭之间的相互作用有效地恢复了植物化学信号（ABA）和水力信号（叶片水势）之间的平衡。结果，主要在盐胁迫下，采用ARD处理时，内在水分利用效率（WUE）和产量性状远高于DI处理。总体而言，生物炭与ARD结合可能是一种维持作物生产力的有效方法。
