Effects of Combined Application of Alginate Oligosaccharides, Potassium Fertilizer and Water Management on the Yield and Quality of Citrus Fruits
【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 oligosa...
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Guangdong Academy of Agricultural Sciences
2025-03-01
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| Series: | Guangdong nongye kexue |
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| Online Access: | http://gdnykx.cnjournals.org/gdnykx/ch/reader/view_abstract.aspx?file_no=202503008 |
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| author | Sijie SONG Xiaoqi LIU Shoujun XU Songpo DUAN Xin OUYANG Jianlie SHEN Jiangang YU Hong SHEN |
| author_facet | Sijie SONG Xiaoqi LIU Shoujun XU Songpo DUAN Xin OUYANG Jianlie SHEN Jiangang YU Hong SHEN |
| author_sort | Sijie SONG |
| collection | DOAJ |
| description | 【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. |
| format | Article |
| id | doaj-art-3de39283ca1c4ec4b35262f7dbeba80e |
| institution | DOAJ |
| issn | 1004-874X |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Guangdong Academy of Agricultural Sciences |
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| series | Guangdong nongye kexue |
| spelling | doaj-art-3de39283ca1c4ec4b35262f7dbeba80e2025-08-20T03:05:45ZengGuangdong Academy of Agricultural SciencesGuangdong nongye kexue1004-874X2025-03-01523758810.16768/j.issn.1004-874X.2025.03.008202503008Effects of Combined Application of Alginate Oligosaccharides, Potassium Fertilizer and Water Management on the Yield and Quality of Citrus FruitsSijie SONG0Xiaoqi LIU1Shoujun XU2Songpo DUAN3Xin OUYANG4Jianlie SHEN5Jiangang YU6Hong SHEN7College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, ChinaCollege of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, ChinaGuangdong Agricultural Environment and Cultivated Land Quality Protection Center/Guangdong Agricultural and Rural Investment Project Center, Guangzhou 510000, ChinaCollege of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, ChinaCollege of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, ChinaGuangzhou SGY Agricultural and Technology Co., Ltd., Guangzhou 510730, ChinaCollege of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, ChinaCollege of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China【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.http://gdnykx.cnjournals.org/gdnykx/ch/reader/view_abstract.aspx?file_no=202503008citrusalginate oligosaccharidespotassium fertilizersoil moisturefruit qualityyield |
| spellingShingle | Sijie SONG Xiaoqi LIU Shoujun XU Songpo DUAN Xin OUYANG Jianlie SHEN Jiangang YU Hong SHEN Effects of Combined Application of Alginate Oligosaccharides, Potassium Fertilizer and Water Management on the Yield and Quality of Citrus Fruits Guangdong nongye kexue citrus alginate oligosaccharides potassium fertilizer soil moisture fruit quality yield |
| title | Effects of Combined Application of Alginate Oligosaccharides, Potassium Fertilizer and Water Management on the Yield and Quality of Citrus Fruits |
| title_full | Effects of Combined Application of Alginate Oligosaccharides, Potassium Fertilizer and Water Management on the Yield and Quality of Citrus Fruits |
| title_fullStr | Effects of Combined Application of Alginate Oligosaccharides, Potassium Fertilizer and Water Management on the Yield and Quality of Citrus Fruits |
| title_full_unstemmed | Effects of Combined Application of Alginate Oligosaccharides, Potassium Fertilizer and Water Management on the Yield and Quality of Citrus Fruits |
| title_short | Effects of Combined Application of Alginate Oligosaccharides, Potassium Fertilizer and Water Management on the Yield and Quality of Citrus Fruits |
| title_sort | effects of combined application of alginate oligosaccharides potassium fertilizer and water management on the yield and quality of citrus fruits |
| topic | citrus alginate oligosaccharides potassium fertilizer soil moisture fruit quality yield |
| url | http://gdnykx.cnjournals.org/gdnykx/ch/reader/view_abstract.aspx?file_no=202503008 |
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