TEA PLANT GUIDE OF FIELD MANAGEMENT & FERTILIZATION
Oct 19, 2016

TEA PLANTS

Tea plants originated in southwestern China, where it leaves was used as a medicinal drink.Two principal varieties are used: Camellia sinensis var. sinensis, which is used for most Chinese, Formosan and Japanese teas, and C. s. var. assamica, used in Pu-erh and most Indian teas (but not Darjeeling).

Tea is an aromatic beverage commonly prepared by pouring hot or boiling water over cured leaves of the Camellia sinensis, an evergreen shrub native to Asia. After water, it is the most widely consumed drink in the world.

A tea plant will grow into a tree of up to 16 m (52 ft) if left undisturbed, but cultivated plants are generally pruned to waist height for ease of plucking. Also, the short plants bear more new shoots which provide new and tender leaves and increase the quality of the tea.

Harvesting of the leaves for tea should not be undertaken until the third year on. For making tea, typically the young bud and outer three young leaves are used. Only the top 1 to 2 inches of the mature plant are picked. These buds and leaves are called 'flushes'. A plant will grow a new flush every seven to 15 days during the growing season. Leaves that are slow in development tend to produce better-flavoured teas. 


FERTILIZATION

Nitrogen - Nitrogen is the main element that form amino acids and proteins in the tea. Nitrogen is involved in every process of phylogeny and individual growth of tea plants. It is not only an important base material for a tea plant normal growing, but also an important material basis for tea yield and quality.

Phosphate - The uptake of phosphorus by tea plant is lower than nitrogen and potassium. The phosphorus in tea plant is mainly in organic form. Phosphorus also improve the quality of tea in aroma and taste and the relationship is not so close for bottom.

Potassium - Potassium is an important nutrient in tea plants, which is essential for tea plant growing. Potassium can increase the content of tea polyphenols and water extract.

Other Nutrients - Mn, Fe, Cu, Mg, S, Rare Earchs also effected the yield and quality of tea.

Fertilization quantity of tea plants should according to the plant ages, gorwing situations, picking quantity and frequency and soil conditions. General appolication is use less in yuang age and lower flush quantity and frequency, and should use more in prime period, multi-leaf picking and the soil is barren.

And tea is  bogey-chlorine plants, it is essential to use chloride-free fertilizers or caution to use chloride-based compound fertilizers, which contribute to increased yield and quality.

Suggested fertilizers

NPK 17-17-17 Sulphur-based compound granular fertilizer

     Application period:  After harvest.

     Fertilization method:  Base-dressing with organic fertilizer


NPK 26-5-5 Sulphur-based compound granular fertilizer

     Application period:  7 days before every leaf budding (flush) or after every picking season.

     Fertilization method:  Site (top)-dressing.


NPK 25-5-5+5S Sulphur-based compound granular fertilizer

     Application period:  7 days before leaf budding (flushor after every picking season.

     Fertilization method:   Site (top)-dressing.


NPK 25-5-5+3.95S+2.6MgO Sulphur-based compound granular fertilizer

     Application period:  7 days before leaf budding (flush) or after every picking season.

     Fertilization method:   Site (top)-dressing.


NPK 22-6-12+5S Sulphur-based compound granular fertilizer

     Application period:  7 days before leaf budding (flush) or after every picking season.

     Fertilization method:   Site (top)-dressing.


NPK 22-21-17 Sulphur-based water soluble fertilizer

     Application period:  During leaf budding (flush)  at eventide.

     Fertilization method:  Foliar nutrition.