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Effect of potassium fertilizer on tea yield and quality: A meta-analysis

文献类型: 外文期刊

作者: Xi, Shiqi 1 ; Chu, Hongyu 1 ; Zhou, Zijun 2 ; Li, Ting 1 ; Zhang, Shirong 3 ; Xu, Xiaoxun 3 ; Pu, Yulin 1 ; Wang, Guiyin 3 ; Jia, Yongxia 1 ; Liu, Xiaojing 1 ;

作者机构: 1.Sichuan Agr Univ, Coll Resources, Chengdu 611130, Peoples R China

2.Sichuan Acad Agr Sci, Soil & Fertilizer Inst, Chengdu 610066, Peoples R China

3.Sichuan Agr Univ, Coll Environm Sci, Chengdu 611130, Peoples R China

4.Sichuan Acad Agr Sci, Soil & Fertilizer Inst, Shizishan Rd 4, Chengdu 610066, Peoples R China

5.Sichuan Agr Univ, Coll Resources, Huimin Rd 211, Wenjiang 611130, Peoples R China

关键词: Potassium fertilizer; tea yield; tea quality; soil-available potassium; tea types

期刊名称:EUROPEAN JOURNAL OF AGRONOMY ( 影响因子:5.2; 五年影响因子:5.9 )

ISSN: 1161-0301

年卷期: 2023 年 144 卷

页码:

收录情况: SCI

摘要: The global tea (Camellia sinensis L.) output has been in decline despite the continued increases in global tea consumption amount and cultivation area. Application of potassium (K) fertilizer is a common way to enhance tea yield and quality, given the widespread deficiency of soil-available K in tea plantations. However, the specific effects of K fertilizer application upon tea yield and quality and its differential effects among varied K fertilizer application amount, soil-available K amount and tea types remain unknown. In this study, 518 pairwise com-parisons between tea productivity after non-application and application of K fertilizers were obtained through a literature review, and then analyzed. The results showed that K application had a significant positive effect on tea yield and overall quality, enhancing the amount of tea yield, the content of amino acid, tea polyphenol, water extract, and catechin by 7.83 %, 7.84 %, 26.79 %, 1.57 % and 6.47 %, respectively. Furthermore, a K application rate of 90-120 kg ha-1 maximized the tea yield and quality. However, K application showed varied effects on tea yield and quality in soils with different available K levels. In terms of tea types, the yield and quality of black and green tea were enhanced under K application. The results of a mixed-effects model indicated that the main factors affecting tea quality were the amount of K fertilizer applied and the soil-available K content, whereas the variation in tea yield results mainly from the tea types. Therefore, to develop high-quality tea plantations and address the contradiction between low tea yield and high tea consumption, efforts should be made to enhance the soil-available K content by optimizing the amount of K applied on tea plantations.

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