不同钾浓度对茶树幼苗矿质养分吸收的影响

doi:10.15933/j.cnki.1004-3268.2021.05.005

河南农业科学 ›› 2021, Vol. 50 ›› Issue (5): 32-40.DOI: 10.15933/j.cnki.1004-3268.2021.05.005

不同钾浓度对茶树幼苗矿质养分吸收的影响

崔莹莹¹，周波²，陈义勇²，刘嘉裕²，戴军¹

（1.华南农业大学资源环境学院，广东广州 510642；2.广东省农业科学院茶叶研究所，广东广州 510640）

收稿日期:2020-11-10 出版日期:2021-05-15 发布日期:2021-05-15
作者简介:崔莹莹（1994-），女，广东龙川人，在读硕士研究生，研究方向：耕地质量与农产品安全。E-mail:838998458@qq.com
基金资助:
国家重点研发计划重点专项（2016YFD0200900，2016YFD0201301，2016YFD0800300）；广东省重点领域研发计划项目（2019B020214003）

Effect of Potassium Concentration on Mineral Nutrient Absorption of Tea Tree Seedlings

CUI Yingying¹,ZHOU Bo²,CHEN Yiyong²,LIU Jiayu²,DAI Jun¹

(1.College of Natural Resources and Environment,South China Agricultural University,Guangzhou 510642,China;2.Tea Research Institute,Guangdong Academy of Agricultural Sciences,Guangzhou 510640,China)

Received:2020-11-10 Published:2021-05-15 Online:2021-05-15

摘要/Abstract

摘要： 了解不同钾浓度水培下茶树幼苗对矿质元素的吸收规律，为茶叶生产中养分管理提供理论支撑。采用室内水培的方式，以茶树品种鸿雁12号的一年龄扦插苗为试验材料，通过单因素方差分析、主成分分析等综合评价不同质量浓度K⁺（0、5、10、20、40 mg/L）水培下茶树幼苗各部位对矿质养分吸收和运移的规律。结果表明，随水培营养液中K⁺质量浓度升高，茶苗根部N、Mg、Ca、Zn含量总体呈上升趋势，K、Na含量总体呈先下降后增加趋势，0~20 mg/L K⁺处理茶苗根部Cu含量显著下降；0 mg/L K⁺水培处理显著促进茶苗根部Fe吸收，40 mg/L K⁺水培下茶苗根部明显偏向N、K、Ca和Zn吸收。随水培营养液中K+质量浓度升高，茶苗茎部Cu、Zn含量增加，K、Na、Fe、Mg含量先升高后降低，0~20 mg/L K⁺处理显著抑制茶苗茎部P吸收。水培营养液中K⁺质量浓度升高显著促进茶苗叶片N、Mn、Cu和Zn吸收；茶苗叶片K、Na含量随水培营养液中K⁺质量浓度升高呈先上升后下降趋势，在10 mg/L K⁺处理达到最高；20~40 mg/L K⁺处理茶苗叶片P、Ca和Mg含量的变化不明显，0~10 mg/L K⁺处理显著抑制茶苗叶片Fe吸收。可见，不同质量浓度K⁺水培下，茶树幼苗各部位对矿质养分的吸收存在显著差异，20~40 mg/L K⁺水培处理促进茶树幼苗根部N、Ca、Mg、Zn的吸收，抑制P、Fe、Cu、Mn的吸收；水培营养液中K⁺质量浓度升高可促进茶树幼苗茎部Cu、Zn的累积，抑制茎部N、P、Mg的累积，促进茶树幼苗叶片N、Mn、Cu、Zn的累积，但高质量浓度K⁺水培处理抑制茶树幼苗叶片K、Na、P的累积。设置试验条件下，10 mg/L K⁺水培处理较为适宜，鲜叶K含量最高且多数矿质养分含量高。

关键词: 茶树, 水培, 钾, 矿质养分, 鸿雁12号

Abstract: In order to provide theoretical basis for nutrient management in tea production,the absorption of mineral elements by tea seedlings under different potassium concentrations was comprehensively analyzed. Using the method of indoor hydroponic culture,1-year-old cuttings of tea plant variety Hongyan No.12 were used as the experimental material.One-way ANOVA and principal component analysis were used to comprehensively evaluate the mineral nutrient absorption and migration of different parts of tea plant seedlings under different mass concentration of K⁺(0,5,10,20,40 mg/ L).The results showed that with the increase of K⁺concentration in hydroponic nutrient solution,the contents of N,Mg,Ca and Zn in the root of tea seedlings were generally increased,while the contents of K and Na were firstly decreased and then increased.The Cu content in the root of tea seedlings treated with 0—20 mg/ L K⁺significantly decreased.0 mg/L K⁺hydroponic treatment significantly promoted the absorption of Fe in the root of tea seedlings,and 40 mg/L K⁺hydroponic treatment significantly favored the absorption of N,K,Ca and Zn in the root of tea seedlings.With the increase of K⁺concentration in hydroponic nutrient solution, the contents of Cu and Zn in the stem of tea seedlings increased,while the contents of K,Na,Fe and Mg increased first and then decreased. The P absorption in the stem of tea seedlings was significantly inhibited by 0—20 mg/L K⁺treatment.The increase of K⁺concentration in hydroponic nutrient solution significantly promoted the absorption of N,Mn,Cu and Zn in tea leaves.The contents of K and Na in leaves of tea seedlings increased first and then decreased with the increase of K⁺concentration in hydroponic nutrient solution,and reached the highest under 10 mg/L K⁺treatment.The contents of P,Ca and Mg in tea leaves did not change significantly after 20—40 mg/L K+ treatment,but Fe absorption in
tea leaves was significantly inhibited by 0—10 mg/L K⁺ treatment.In conclusion, the absorption of mineral nutrients in different parts of tea tree seedlings is significantly different under different concentration of K+ hydroponic treatment.20—40 mg/L K⁺hydroponic treatment can promote the absorption of N,Ca,Mg and Zn in the root of tea tree seedlings,but inhibit the absorption of P,Fe,Cu and Mn.The increase of K⁺concentration in hydroponic nutrient solution can promote the accumulation of Cu and Zn in the stem of tea tree seedlings,inhibit the accumulation of N,P and Mg in the stem,and promote the accumulation of N,Mn,Cu and Zn in leaves of tea tree seedlings. However,high K⁺concentration hydroponic treatment can inhibit the accumulation of K,Na and P in leaves of tea tree seedlings.Under the condition of this experiment,fresh leaves treated with 10 mg/L K⁺ hydroponics have the highest K content and more mineral nutrients.

Key words: Tea plant, Hydroponics, Potassium, Mineral nutrient, Hongyan No.12

中图分类号:

S571.1

崔莹莹, 周波, 陈义勇, 刘嘉裕, 戴军. 不同钾浓度对茶树幼苗矿质养分吸收的影响[J]. 河南农业科学, 2021, 50(5): 32-40.

CUI Yingying, ZHOU Bo, CHEN Yiyong, LIU Jiayu, DAI Jun. Effect of Potassium Concentration on Mineral Nutrient Absorption of Tea Tree Seedlings[J]. Journal of Henan Agricultural Sciences, 2021, 50(5): 32-40.

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不同钾浓度对茶树幼苗矿质养分吸收的影响

Effect of Potassium Concentration on Mineral Nutrient Absorption of Tea Tree Seedlings

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