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Rational application of combined fertilizers improved tea growth and quality components
Ali Raza1,2, Liu Li1,2, Lin Luo1,2
1CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, P. R. China.
Combining organic and chemical fertilizers significantly boosts tea plant growth and quality. The 75% organic fertilizer/25% chemical fertilizer (75OF/25CF) and 100% organic fertilizer (100OF/0CF) treatments showed the best results for tea yield and quality.
Area of Science:
- Agricultural Science
- Agronomy
- Plant Science
Background:
- Excessive chemical fertilizer use degrades tea quality.
- Organic and chemical fertilizers (OF and CF) were combined to assess their impact on tea growth and quality.
Purpose of the Study:
- To investigate the effects of combined organic and chemical fertilizers on tea plant growth and quality.
- To determine optimal fertilization strategies for high-yield, high-quality tea production.
Main Methods:
- A pot experiment with six treatments: control, 100% CF, and four combinations of OF and CF (25%/75%, 50%/50%, 75%/25%, 100%/0%).
- Measurements included plant biomass, net photosynthetic rate, chloroplast structure, and key quality components (polyphenols, flavonoids, sugars, catechins, caffeine, amino acids, chlorophyll).
Main Results:
- All fertilization treatments improved tea growth and quality compared to the control.
- The 75OF/25CF and 50OF/50CF treatments yielded higher plant shoot biomass.
- The 75OF/25CF and 100OF/0CF treatments enhanced chloroplast structure, photosynthetic rate, and key quality compounds (TAAs, polyphenols, catechins, caffeine).
- Principal Component Analysis confirmed that 75OF/25CF and 100OF/0CF treatments improved tea quality over sole chemical fertilizer application.
Conclusions:
- Rational combinations of organic and chemical fertilizers, particularly 75OF/25CF and 100OF/0CF, significantly enhance both tea growth and quality.
- Organic fertilization strategies hold high potential for improving tea yield and producing superior quality tea leaves.
