OneCeylon
All questions

Hill country tea soil acidification: dolomite lime application rates and aluminum toxicity?

Seen by 1,190 travellers
Jump to the accepted answer
N
Nils Soils•890 rep

How do high-grown tea plantations manage soil pH between 4.5 and 5.2 to optimize Camellia sinensis aluminum uptake without triggering root necrosis?

21

5 Answers from travellers

✓Accepted Answer

Camellia sinensis is an aluminum-accumulating plant that thrives in acidic soils, with optimal root growth between pH 4.5 and 5.0. However, decades of ammonium sulfate applications and monsoonal leaching can drive soil pH below 4.0. In hyper-acidic soils, soluble aluminum ions (Al3+) reach toxic concentrations, inhibiting root-cell mitosis and stunting bush flush. Estates broadcast agricultural dolomite (magnesium calcium carbonate) at calibrated rates (500kg to 1 ton per hectare) after bush pruning to neutralize excess acidity and replenish vital magnesium for chlorophyll synthesis.

37
D
Dr Senaka Soil•1820 rep

Over-liming soil past pH 5.5 is disastrous for tea; higher pH immobilizes trace micronutrients like iron, manganese, and zinc, causing bush chlorosis.

21
N
Nils Soils•890 rep

Planting deep-rooting vetiver grass along contour terrace cuts captures potassium and calcium before monsoonal rains wash nutrients down slopes.

17
J
Jules Plant•915 rep

Balanced soil magnesium levels directly influence the concentration of theanine amino acids in finished tea, enhancing mouthfeel and sweetness in the cup.

14
I
Ian Flavors•880 rep

Soil core samples must be taken at 15cm and 30cm depths across each field block every four years to map localized pH variance.

12
M
Marta Stones•910 rep

You must be logged in to post an answer.

Log In to Answer

Related questions

Browse all questions