广东农业科学2025，Vol.52Issue(3)：75-88,14.DOI:10.16768/j.issn.1004-874X.2025.03.008
海藻寡糖与钾肥及控水耦合技术对柑橘果实产量和品质的影响
Effects of Combined Application of Alginate Oligosaccharides,Potassium Fertilizer and Water Management on the Yield and Quality of Citrus Fruits
摘要
Abstract
[Objective]The South China region is abundant in water and heat resources but frequently suffers from seasonal droughts and numerous pests and diseases,which significantly impact the yield and quality of citrus fruits.This study investigated the effects of combined applications of alginate oligosaccharides(AOS),potassium fertilizer(K),and water management on the main citrus varieties cultivated in South China,aiming to provide technical support for high-quality citrus production.[Method]Two independent experiments were conducted over two years using'Jinqiushatangju','Seedless orah',and'Hongjiang orange'as experimental materials.During the fruit expansion and maturation periods,the impacts of root application of AOS and K on citrus yield and quality were examined across four treatment groups:conventional fertilization(CK),root application of K,root application of AOS,and mixed root application of AOS and K(AOS+K).Additionally,the effects of combining AOS+K with water management on fruit yield and quality were studied,with four treatment groups:conventional fertilization(CK),AOS+K with 70%-80%water management(AOS+K+W80),AOS+K with 60%-70%water management(AOS+K+W70),and AOS+K with 50%-60%water management(AOS+K+W60).[Result]Compared to conventional fertilization,AOS+K treatment significantly increased the soluble sugar content and per-plant yield of the three citrus varieties by 4.57%to 7.52%and 9.54%to 13.13%,respectively.All indicators were better than those of the single application of AOS or K to the root,indicating a significant synergistic effect between AOS and K.Among the coupling techniques,AOS+K+W70 treatment improved fruit skin color and increased fruit diameter,particularly benefiting'Jinqiushatangju'and'Seedless Orah',with respective increases in per-plant yield of 13.69%and 10.65%.This treatment also significantly increased the soluble sugar and vitamin C content of the three citrus fruits,with increase rates ranging from 9.30%to 12.38%and 6.70%to 14.66%,respectively.Electronic nose analysis of volatile substances showed that AOS+K+W70 treatment maximized the relative content of nitrogen oxides,hydrogen sulfide,ethanol,aromatic components,and organic sulfides in citrus,promoting fruit ripening.Moreover,this coupling technique significantly enhanced the economic benefits of citrus cultivation.[Conclusion]The combined application of AOS and K through root irrigation with the management of soil moisture content at 60%-70%,is the most effective technique for increasing yield and improving quality in the three citrus varieties.关键词
柑橘/海藻寡糖/钾肥/土壤水分/果实品质/产量Key words
citrus/alginate oligosaccharides/potassium fertilizer/soil moisture/fruit quality/yield分类
农业科技引用本文复制引用
宋思捷,刘晓奇,徐守俊,段松坡,欧阳歆,沈坚列,喻建刚,沈宏..海藻寡糖与钾肥及控水耦合技术对柑橘果实产量和品质的影响[J].广东农业科学,2025,52(3):75-88,14.基金项目
广州市重点研发计划项目(202206010064) （202206010064）
广东省科技特派员项目(2023E04J0191) （2023E04J0191）
中央耕地建设与利用"化肥减量增效田间试验"项目(4200F24072) （4200F24072）
