ZENG Tingting,TANG Bei,WANG Jialun,et al.Effects of Tea Planting Years on the Soil Acidification Characteristics of ‘Qianmei 601’ Tea Gardens[J].Northern Horticulture,2025,(24):89-95.[doi:10.11937/bfyy.20250569]
植茶年限对‘黔湄601’茶园土壤酸化特征的影响
- Title:
- Effects of Tea Planting Years on the Soil Acidification Characteristics of ‘Qianmei 601’ Tea Gardens
- 文章编号:
- 1001-0009(2025)24-0089-07
- Keywords:
- tea planting years; ‘Qianmei 601’; acidity of soil; acid neutralization capacity; alkali neutralization capacity
- 分类号:
- S 156.3;S 571.1
- 文献标志码:
- A
- 摘要:
- 以贵州省湄潭县不同种植年限‘黔湄601’茶园土壤为试材,采用土壤酸度相关指标分析及酸碱缓冲培养方法,利用二次多项式模型拟合酸、碱滴定曲线,以pH 4.0和pH 6.0 为参比计算土壤酸中和容量(ANCpH4.0)和碱中和容量(ANCpH6.0),研究了不同植茶年限下土壤酸度及酸、碱中和容量变化特征,以期为不同种植年限茶园土壤酸度改良提供参考依据。结果表明:随着植茶年限的增加,土壤pH不断降低,植茶30年以上茶园土壤0~20、20~40、40~60 cm土层pH较新植茶园(<10年)分别降低0.82、0.91、1.21个单位,阳离子交换量呈先降低后增加趋势,其中,交换性钾、交换性钙及交换性镁含量随植茶年限的增加而降低,交换性钠含量随植茶年限的增加而增加。ANCpH4.0随着植茶年限的增加从12.5 mmol·kg-1降低至4.5 mmol·kg-1,植茶30年后土壤ANCpH6.0是植茶<10、10~20、20~30年的2倍。综上可知,植茶年限加速了‘黔湄601’茶园土壤酸化,在茶园土壤酸度阻控和治理管理中,需充分考虑植茶年限和ANCpH 6.0等指标。
- Abstract:
- Taking soil samples from ‘Qianmei 601’ tea plantations with different planting years in Meitan county,Guizhou Province as the test material,the soil acidity-related indicators and acid-base buffer incubation methods were used.The acid and base titration curves were fitted by using a quadratic polynomial model.The soil acid neutralizing capacity (ANCpH4.0) and base neutralizing capacity (ANCpH6.0) were calculated with reference to pH 4.0 and pH 6.0,respectively.The research investigated the variation characteristics of soil acidity indicators and acid-base neutralizing capacities under different tea cultivation durations,in order to provide reference for improving soil acidity in tea plantations with varying planting years.The results showed that with the increase in planting years,the soil pH continuously decreased.In tea gardens with over 30 years of planting,the pH of the 0-20 cm,20-40 cm,and 40-60 cm soil layers decreased by 0.82,0.91,and 1.21 units,respectively,compared with newly planted tea gardens (<10 years).The cation exchange capacity initially decreased and then increased.Specifically,the contents of exchangeable potassium,calcium,and magnesium decreased with increasing planting year,while the content of exchangeable sodium increased.ANCpH4.0 decreased from 12.5 mmol·kg-1 to 4.5 mmol·kg-1 with increasing planting year.After 30 years of planting,ANCpH6.0 was twice that of the <10,10-20,20-30 years planting years.In summary,the planting year accelerated the acidification of the soil in ‘Qianmei 601’ tea gardens.In the management of soil acidity control and remediation in tea gardens,it was necessary to fully consider factors such as tea plant age and ANCpH6.0.
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备注/Memo
第一作者简介:曾廷廷(1991-),女,硕士,助理研究员,现主要从事茶树栽培等研究工作。E-mail:zengtingting007@163.com.责任作者:张小琴(1986-),女,硕士,副研究员,现主要从事茶树栽培等研究工作。E-mail:bandnab@163.com.基金项目:贵州省农业科学院青年科技基金资助项目([2021]28号,[2021]30号,[2022]06号);贵州省科学技术厅资助项目 (黔科合支撑([2023]一般086号);国家现代农业产业技术体系资助项目(CARS-19);贵州省茶叶产业技术体系资助项目(GZCYCYJSTX-03)。收稿日期:2025-02-24