PDF(Pubmed)
Abstract：
Climate change poses major challenges for agriculture in arid and semi-arid regions, with drought conditions severely affecting water-intensive crops such as tomatoes. This study evaluates the efficacy of organic amendments, derived from horse manure, and arbuscular mycorrhizal fungi (AMF) on enhancing tomato (Solanum lycopersicum L.) fruit quality and soil health under semi-arid field conditions. The experimental design included two irrigation regimes (well-watered and drought stress) and two levels of vermicompost application (C1 5 t ha-1 and C2 10 t ha-1), applied individually or in combination with AMF. The results indicate that drought stress reduced tomato fruit growth and yield, while osmoprotectant accumulation, antioxidant enzyme activity, and bioactive compound levels increased, and the 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity of tomato fruit also increased. Notably, the biostimulants application, especially (C1+AMF), counteracted the adverse effects of drought, compared to the control, by significantly enhancing fruit yields (60%), as well as increasing ascorbic acid levels (59%) and free amino acids content (90%). These treatments also improved the activity of bioactive compounds and nutrient uptake in the fruit. Furthermore, biostimulant application positively affected the physicochemical properties of soil. The results obtained confirm that the application of biostimulants can be suitable for improving crop sustainability and adaptability under conditions of water stress in semi-arid field regions.
摘要：
气候变化对干旱和半干旱地区的农业构成重大挑战,干旱条件严重影响了西红柿等水密集型作物。这项研究评估了有机改良剂的功效，来源于马粪,和丛枝菌根真菌（AMF）在半干旱田间条件下提高番茄（SolanumlycopersicumL.）果实品质和土壤健康。实验设计包括两个灌溉制度（充分浇水和干旱胁迫）和两个水平的蠕虫肥料施用（C15tha-1和C210tha-1），单独应用或与AMF组合应用。结果表明,干旱胁迫降低了番茄果实的生长和产量,而渗透保护剂积累，抗氧化酶活性，生物活性化合物水平增加，番茄果实的2,2-二苯基-1-苦基肼基自由基清除活性也增加。值得注意的是,生物刺激剂的应用，尤其是（C1+AMF），抵消了干旱的不利影响，与对照相比，通过显著提高水果产量(60%)，以及增加抗坏血酸水平（59％）和游离氨基酸含量（90％）。这些处理还改善了果实中生物活性化合物的活性和营养吸收。此外，生物刺激剂的施用对土壤理化性质有积极影响。所获得的结果证实，生物刺激剂的应用可以适用于改善半干旱田间地区水分胁迫条件下的作物可持续性和适应性。
