The Prolonged Application of Organic Fertilizers Increases the Quality and Yield of Tea Crops
The substitution of chemical nitrogen (N) with organic fertilizers in tea plantations has been widely recognized as a strategy to maintain tea yield and improve soil quality, ensuring the sustainability of tea production systems. However, the effects of long-term organic-fertilizer substitution on t...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-04-01
|
| Series: | Plants |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2223-7747/14/9/1317 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850136464893935616 |
|---|---|
| author | Cuiting Dai Fen Xiang Hongyan Liu Lingyun Zhou Wei Li |
| author_facet | Cuiting Dai Fen Xiang Hongyan Liu Lingyun Zhou Wei Li |
| author_sort | Cuiting Dai |
| collection | DOAJ |
| description | The substitution of chemical nitrogen (N) with organic fertilizers in tea plantations has been widely recognized as a strategy to maintain tea yield and improve soil quality, ensuring the sustainability of tea production systems. However, the effects of long-term organic-fertilizer substitution on tea yield and quality, soil properties, and bacterial communities have yet to be fully investigated, and the underlying mechanisms affecting tea yield and quality remain unclear. We conducted a six-year-long field experiment in a tea plantation to investigate the relationships among soil properties, bacterial communities, and the yield and quality of tea. Four treatments were compared: no fertilizer (NF), conventional fertilization (CF), 50% chemical N fertilizer substituted with a microbial organic fertilizer (MF), and 50% chemical N fertilizer substituted with a special organic fertilizer for tea (OF). The results showed that the substitution of organic fertilizers increased the spring tea yield by 6.4%~8.5% and the amino acid content of tea by up to 7.8%, while reducing tea polyphenol levels by 1.2–4.4% compared to CF. The soil quality improved significantly, with total phosphorus rising by 20.0% (MF) and 22.9% (OF), and soil organic matter increasing notably in the MF treatment group. The soil quality index (SQI) improved by 38.6% in the OF treatment group compared to the CF treatment group. Organic treatments reshaped bacterial communities, with the OF boosting <i>Acidobacteriota</i> (36.4%) and <i>Planctomycetota</i> (444.4%), and the MF enriching <i>Actinobacteria</i> and <i>Gemmatimonadetes</i>. Bacterial diversity (Shannon and Chao1 indices) correlated positively with the soil organic matter, total nitrogen, and pH. Changes in microbial communities were driven by pH, soil organic matter, and nitrogen levels. The partial least squares path model analysis confirmed that fertilization indirectly influenced tea yield (67% variance explained) and quality (79% variance explained) via soil properties and bacterial communities. These findings highlight the potential of organic-fertilizer substitution to promote sustainable tea production. |
| format | Article |
| id | doaj-art-2782e8126bdf45f0be6024363c406774 |
| institution | OA Journals |
| issn | 2223-7747 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj-art-2782e8126bdf45f0be6024363c4067742025-08-20T02:31:08ZengMDPI AGPlants2223-77472025-04-01149131710.3390/plants14091317The Prolonged Application of Organic Fertilizers Increases the Quality and Yield of Tea CropsCuiting Dai0Fen Xiang1Hongyan Liu2Lingyun Zhou3Wei Li4Hunan Tea Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, ChinaHunan Tea Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, ChinaHunan Tea Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, ChinaHunan Tea Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, ChinaHunan Tea Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, ChinaThe substitution of chemical nitrogen (N) with organic fertilizers in tea plantations has been widely recognized as a strategy to maintain tea yield and improve soil quality, ensuring the sustainability of tea production systems. However, the effects of long-term organic-fertilizer substitution on tea yield and quality, soil properties, and bacterial communities have yet to be fully investigated, and the underlying mechanisms affecting tea yield and quality remain unclear. We conducted a six-year-long field experiment in a tea plantation to investigate the relationships among soil properties, bacterial communities, and the yield and quality of tea. Four treatments were compared: no fertilizer (NF), conventional fertilization (CF), 50% chemical N fertilizer substituted with a microbial organic fertilizer (MF), and 50% chemical N fertilizer substituted with a special organic fertilizer for tea (OF). The results showed that the substitution of organic fertilizers increased the spring tea yield by 6.4%~8.5% and the amino acid content of tea by up to 7.8%, while reducing tea polyphenol levels by 1.2–4.4% compared to CF. The soil quality improved significantly, with total phosphorus rising by 20.0% (MF) and 22.9% (OF), and soil organic matter increasing notably in the MF treatment group. The soil quality index (SQI) improved by 38.6% in the OF treatment group compared to the CF treatment group. Organic treatments reshaped bacterial communities, with the OF boosting <i>Acidobacteriota</i> (36.4%) and <i>Planctomycetota</i> (444.4%), and the MF enriching <i>Actinobacteria</i> and <i>Gemmatimonadetes</i>. Bacterial diversity (Shannon and Chao1 indices) correlated positively with the soil organic matter, total nitrogen, and pH. Changes in microbial communities were driven by pH, soil organic matter, and nitrogen levels. The partial least squares path model analysis confirmed that fertilization indirectly influenced tea yield (67% variance explained) and quality (79% variance explained) via soil properties and bacterial communities. These findings highlight the potential of organic-fertilizer substitution to promote sustainable tea production.https://www.mdpi.com/2223-7747/14/9/1317organic fertilizersoil qualitysoil bacterial communitytea yieldtea quality |
| spellingShingle | Cuiting Dai Fen Xiang Hongyan Liu Lingyun Zhou Wei Li The Prolonged Application of Organic Fertilizers Increases the Quality and Yield of Tea Crops Plants organic fertilizer soil quality soil bacterial community tea yield tea quality |
| title | The Prolonged Application of Organic Fertilizers Increases the Quality and Yield of Tea Crops |
| title_full | The Prolonged Application of Organic Fertilizers Increases the Quality and Yield of Tea Crops |
| title_fullStr | The Prolonged Application of Organic Fertilizers Increases the Quality and Yield of Tea Crops |
| title_full_unstemmed | The Prolonged Application of Organic Fertilizers Increases the Quality and Yield of Tea Crops |
| title_short | The Prolonged Application of Organic Fertilizers Increases the Quality and Yield of Tea Crops |
| title_sort | prolonged application of organic fertilizers increases the quality and yield of tea crops |
| topic | organic fertilizer soil quality soil bacterial community tea yield tea quality |
| url | https://www.mdpi.com/2223-7747/14/9/1317 |
| work_keys_str_mv | AT cuitingdai theprolongedapplicationoforganicfertilizersincreasesthequalityandyieldofteacrops AT fenxiang theprolongedapplicationoforganicfertilizersincreasesthequalityandyieldofteacrops AT hongyanliu theprolongedapplicationoforganicfertilizersincreasesthequalityandyieldofteacrops AT lingyunzhou theprolongedapplicationoforganicfertilizersincreasesthequalityandyieldofteacrops AT weili theprolongedapplicationoforganicfertilizersincreasesthequalityandyieldofteacrops AT cuitingdai prolongedapplicationoforganicfertilizersincreasesthequalityandyieldofteacrops AT fenxiang prolongedapplicationoforganicfertilizersincreasesthequalityandyieldofteacrops AT hongyanliu prolongedapplicationoforganicfertilizersincreasesthequalityandyieldofteacrops AT lingyunzhou prolongedapplicationoforganicfertilizersincreasesthequalityandyieldofteacrops AT weili prolongedapplicationoforganicfertilizersincreasesthequalityandyieldofteacrops |