The Combined Use of Soil Conditioner and Foliar Sulfur Spray Successfully Prevents Dark Pericarp Disease Induced by Manganese Toxicity in Litchi
文献类型： 外文期刊
作者： Liu, Huilin 1 ; Bai, Cuihua 1 ; Guo, Yongjun 2 ; Yang, Zhuo 1 ; Luo, Xinping 4 ; Liu, Silin 1 ; Huang, Yinghui 1 ; Yao, Lixian 1 ;
作者机构： 1.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Peoples R China
2.Foshan Zhibao Ecol Technol Co Ltd, Foshan 528000, Peoples R China
3.Guangdong Prov Key Lab Agr & Rural Pollut Abatemen, Guangzhou 510642, Peoples R China
4.Yunnan Acad Agr Sci, Inst Trop & Subtrop Cash Crops, Baoshan 678099, Peoples R China
关键词： litchi; Mn stress; soil pH; phenolic compound; antioxidant enzyme
期刊名称：AGRONOMY-BASEL （ 影响因子：3.7； 五年影响因子：4.0 ）
ISSN：
年卷期： 2024 年 14 卷 3 期
页码：
收录情况： SCI
摘要： Manganese toxicity is a major obstacle to agriculture in acid soils. Dark pericarp disease (DPD) is a newly spread physiological disorder induced by excess Mn in litchi, leading to undesirable fruit appearance and substantial economic loss. In this work, broadcast of alkaline soil conditioner in winter, followed by foliar sprays of ascorbic acid and sulfur solution at fruit development, was adopted to examine the effect of these combinations on DPD alleviation in a litchi orchard, with DPD morbidities of 70 similar to 85% in recent ten years. The combination of soil conditioner broadcast and foliar water spray was used as the control. At harvest, DPD incidence was significantly decreased by sulfur spray (3.3 +/- 1.0%) and slightly reduced by ascorbic acid spray (10.7 +/- 8.0%) compared to the control (12.9 +/- 7.6%). Soil pH and available Mn were significantly increased and reduced by the soil conditioner broadcast. Sulfur spray significantly inhibited Mn uptake but enhanced the accumulation of Mg, Ca, sugars and cyanidin-3-rutinoside in the pericarp, leading to improved fruit pigmentation. Antioxidase activities were regulated to resist Mn stress by sulfur spray. The spray of ascorbic acid could not mitigate DPD as expected, probably due to the dose used. Conclusively, this study provides a practicable approach to mitigate Mn phytoavailability in acid soils.
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